BCO-DMO | ERDDAP - bcodmo_dataset_805226

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	Location: \n Arctic Ocean: P-1-94-AR P21, 84o5' N, 174o58' W \n California margin: W-2-98-NC TF1, 41o5' N, 125o1' W \n Equatorial Pacific: TT013-06MC, 12o00' S, 134o56' W\n \nMethodology:\n \nPrior to the extraction, we freeze-dried, ground and sieved sediment samples\nto less than 125 \\u03bcm (Ruttenberg 1992). For a given sample, we weighed\nfour sample replicates (2 g) and placed each in 250 mL HDPE bottles. Sodium\ndithionite (F.W. 147.12 g/mol; 7.4 g) was added to each sample split, followed\nby 200 mL of citrate-bicarbonate solution (pH 7.6). This step produces\neffervescence, so the solution should be added slowly to the sample. We shook\nsamples for 8 h and then centrifuged them at 3,700 rpm for 15 min. We filtered\nthe supernatants with a 0.4 \\u03bcm polycarbonate filter. We took 20 mL\naliquots from the filtrate for each sample split for MRP and total P analyses,\nand kept them refrigerated until analysis within 24 h. We added 200 mL of\nultrapure water to the solid residue for each sample split as a wash step\nafter the above reductive step, shook samples for 2 h, and then centrifuged\nthem at 3,700 rpm for 15 min. We filtered the supernatants with 0.4 \\u03bcm\npolycarbonate filters and set aside 20 mL of filtrate from each sample split\nfor MRP and total P analyses. We then extracted the solid sample residues in\n200 mL of sodium acetate buffer (pH 4.0) for 6 h. At the end of this\nextraction step, we centrifuged the bottles at 3,700 rpm for 15 min, filtered\nthe supernatants with 0.4 \\u03bcm polycarbonate filters and took a 20 mL\naliquot of filtrate from each sample split for MRP and total P analyses. We\nadded 200 mL of ultrapure water to the solid residue for each sample split as\na wash step, shook samples for 2 h, and then centrifuged them at 3,700 rpm for\n15 min. We filtered the supernatants with 0.4 \\u03bcm polycarbonate filters\nand set aside 20 mL of filtrate from each sample split for MRP and total P\nanalyses. We repeated the water rinse step, and collected aliquots for MRP and\ntotal P analyses as in the previous steps. The concentrations of TP were\ndetermined as described below.\n \nSolid sediment sample residues following the pretreatment described above were\ntransferred to two 50 mL centrifuge tubes (2 sample replicates combined per\ntube). We added 20 mL of 0.25 M NaOH + 0.05 M Na2EDTA solution to each tube,\nvortexed until all sediment was resuspended and then shook samples for 6 h at\nroom temperature (Cade-Menun et al. 2005). We used a solid to solution ratio\nof 1:5 for this step to minimize the amount of freeze-dried material that will\nneed to be dissolved for the 31P NMR experiments. Large amounts of salts from\nthe NaOH-EDTA concentrated in NMR samples lead to higher viscosity and\nincrease line broadening on NMR spectra (Cade-Menun and Liu 2013). We chose an\nextraction time of 6 h to improve total P recovery while limiting the\ndegradation of natural P compounds in the sample. At the end of the\nextraction, samples were centrifuged at 3,700 rpm for 15 min and supernatants\ndecanted into 50 mL centrifuge tubes. We collected a 500 \\u03bcL aliquot from\neach sample, which we diluted with 4.5 mL of ultrapure water. These were\nrefrigerated until analysis for total P content on the ICP-OES. The sample\nresidues and supernatants were frozen on a slant to maximize the exposed\nsurface area during the lyophilization step; this was done immediately after\nthe removal of the 500 \\u03bcL aliquot. Once completely frozen, the uncapped\ntubes containing supernatants and residues were freeze-dried over the course\nof 48 h. Each tube was covered with parafilm with small holes from a tack to\nminimize contamination. Freeze-dried supernatants from identical sample splits\nwere combined and dissolved in 500 \\u03bcL each of ultrapure water, D2O, NaOH-\nEDTA and 10 M NaOH prior to 31P NMR analysis. The D2O is required as signal\nlock in the spectrometer (Cade-Menun and Liu 2013). Sample pH was maintained\nat a pH > 12 to optimize peak separation (Cade-Menun 2005; Cade-Menun and Liu\n2013). Sample pH was assessed with a glass electrode, and verified with pH\npaper to account for the alkaline error caused by the high salt content of our\nsamples (Covington 1985).\n \nFreeze-dried sample residues were ashed in crucibles at 550oC for 2 h and then\nextracted in 25 mL of 0.5 M sulfuric acid for 16 h (Olsen and Sommers 1982;\nCade-Menun and Lavkulich 1997). We centrifuged samples at 3,700 rpm for 15\nmin, filtered supernatants with 0.4 \\u03bcm polycarbonate filters, and\nmeasured P content on an ICP-OES.\n \nTotal P concentrations in sediment extracts were measured using inductively\ncoupled plasma optical emission spectroscopy (ICP-OES). Standards were\nprepared with the same solutions as those used for the extraction procedure in\norder to minimize matrix effects on P measurements. Sediment extracts and\nstandards (0 \\u03bcM, 3.2 \\u03bcM, 32 \\u03bcM and 320 \\u03bcM) were diluted to\nlower salt content to prevent salt buildup on the nebulizer (1:20 dilution for\nstep 1, 1:10 for steps 2 \\u2013 4). Concentration data from both wavelengths\n(213 nm and 214 nm) were averaged to obtain extract concentrations for each\nsample. The detection limit for P on this instrument for both wavelengths is\n0.4 \\u03bcM. The MRP concentrations were measured on a QuikChem 8000 automated\nion analyzer. Standards were prepared with the same solutions used for the\nextraction step to minimize matrix effects on P measurements. Sediment\nextracts and standards (0 \\u2013 30 \\u03bcM PO4) were diluted ten-fold to\nprevent matrix interference with color development. The detection limit for P\non this instrument is 0.2 \\u03bcM. We derived MUP concentrations by\nsubtracting MRP from total P concentrations.
attribute	NC_GLOBAL	awards_0_award_nid	String	554980
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0939564
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward?AWD_ID=0939564
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	TP sediments with pretreatment \n PI: A. Paytan \n Data Version 1: 2020-06-23
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	dataset_current_state	String	Final and no updates
attribute	NC_GLOBAL	date_created	String	2020-03-02T22:10:22Z
attribute	NC_GLOBAL	date_modified	String	2020-07-02T21:01:27Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.805226.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/805226
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	FIA
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	805235
attribute	NC_GLOBAL	instruments_0_description	String	An instrument that performs flow injection analysis. Flow injection analysis (FIA) is an approach to chemical analysis that is accomplished by injecting a plug of sample into a flowing carrier stream. FIA is an automated method in which a sample is injected into a continuous flow of a carrier solution that mixes with other continuously flowing solutions before reaching a detector. Precision is dramatically increased when FIA is used instead of manual injections and as a result very specific FIA systems have been developed for a wide array of analytical techniques.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB36/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Flow Injection Analyzer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	657
attribute	NC_GLOBAL	instruments_0_supplied_name	String	QuikChem 8000 automated ion analyzer
attribute	NC_GLOBAL	keywords	String	analyte, Analyte_Name, bco, bco-dmo, biological, calib, chemical, conc, Conc_Calib, corr, data, dataset, dilution, dmo, erddap, extract, int, Int_Corr, management, name, oceanography, office, preliminary, rsd, RSD_Corr_Int, sample, Sample_ID, step
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/805226/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/805226
attribute	NC_GLOBAL	param_mapping	String	{'805226': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/805226/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of California-Santa Cruz
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UC Santa Cruz
attribute	NC_GLOBAL	people_0_person_name	String	Adina Paytan
attribute	NC_GLOBAL	people_0_person_nid	String	50821
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	University of California-Santa Cruz
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	UC Santa Cruz
attribute	NC_GLOBAL	people_1_person_name	String	Dr Delphine Defforey
attribute	NC_GLOBAL	people_1_person_nid	String	664058
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Amber D. York
attribute	NC_GLOBAL	people_2_person_nid	String	643627
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	project	String	Marine Sediment Analysis 31P NMR
attribute	NC_GLOBAL	projects_0_acronym	String	Marine Sediment Analysis 31P NMR
attribute	NC_GLOBAL	projects_0_description	String	We developed and tested a new approach to prepare marine sediment samples for solution 31P nuclear magnetic resonance spectroscopy (31P NMR). This approach addresses the effects of sample pretreatment on sedimentary P composition and increases the signal of low abundance P species in 31P NMR spectra by removing up the majority inorganic P from sediment samples while causing minimal alteration of the chemical structure of organic P compounds. The method was tested on natural marine sediment samples from different localities (Equatorial Pacific, California Margin and Arctic Ocean) with high inorganic P content, and allowed for the detection of low abundance P forms in samples for which only an orthophosphate signal could be resolved with an NaOH-EDTA extraction alone. This new approach will allow the use of 31P NMR on samples for which low organic P concentrations previously hindered the use of this tool, and will help answer longstanding question regarding the fate of organic P in marine sediments. We developed and tested a new approach to prepare marine sediment samples for solution 31P nuclear magnetic resonance spectroscopy (31P NMR). This approach addresses the effects of sample pretreatment on sedimentary P composition and increases the signal of low abundance P species in 31P NMR spectra by removing up the majority inorganic P from sediment samples while causing minimal alteration of the chemical structure of organic P compounds. The method was tested on natural marine sediment samples from different localities (Equatorial Pacific, California Margin and Arctic Ocean) with high inorganic P content, and allowed for the detection of low abundance P forms in samples for which only an orthophosphate signal could be resolved with an NaOH-EDTA extraction alone. This new approach will allow the use of 31P NMR on samples for which low organic P concentrations previously hindered the use of this tool, and will help answer longstanding question regarding the fate of organic P in marine sediments. \nNSF C-DEBI Award #156246 to Dr. Adina Paytan\nNSF C-DEBI Award #157598 to Dr. Delphine Defforey
attribute	NC_GLOBAL	projects_0_geolocation	String	Equatorial Pacific, California Margin, Arctic Ocean
attribute	NC_GLOBAL	projects_0_name	String	A new marine sediment sample preparation scheme for solution 31P NMR analysis
attribute	NC_GLOBAL	projects_0_project_nid	String	664054
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Total phosphorus concentrations in nuclear magnetic resonance (NMR) sediment pretreatment extracts from samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998.
attribute	NC_GLOBAL	title	String	Total phosphorus concentrations in NMR sediment pretreatment extracts from samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.5
variable	Extract		String
attribute	Extract	bcodmo_name	String	sample_descrip
attribute	Extract	description	String	Extract solution
attribute	Extract	long_name	String	Extract
attribute	Extract	units	String	unitless
variable	Step		String
attribute	Step	bcodmo_name	String	sample_descrip
attribute	Step	description	String	Step in the sequential extraction scheme (1-4)
attribute	Step	long_name	String	Step
attribute	Step	units	String	unitless
variable	Dilution		String
attribute	Dilution	bcodmo_name	String	sample_descrip
attribute	Dilution	description	String	Sample dilution
attribute	Dilution	long_name	String	Dilution
attribute	Dilution	units	String	unitless
variable	Sample_ID		String
attribute	Sample_ID	bcodmo_name	String	sample
attribute	Sample_ID	description	String	Sample ID, unique sample identifier
attribute	Sample_ID	long_name	String	Sample ID
attribute	Sample_ID	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	Sample_ID	units	String	unitless
variable	Analyte_Name		String
attribute	Analyte_Name	bcodmo_name	String	sample_descrip
attribute	Analyte_Name	description	String	Element analyzed
attribute	Analyte_Name	long_name	String	Analyte Name
attribute	Analyte_Name	units	String	unitless
variable	Int_Corr		String
attribute	Int_Corr	bcodmo_name	String	unknown
attribute	Int_Corr	description	String	Intensity (corrected)
attribute	Int_Corr	long_name	String	Int Corr
attribute	Int_Corr	units	String	unitless
variable	RSD_Corr_Int		double
attribute	RSD_Corr_Int	_FillValue	double	NaN
attribute	RSD_Corr_Int	actual_range	double	-0.001279317841, 1840331.376
attribute	RSD_Corr_Int	bcodmo_name	String	unknown
attribute	RSD_Corr_Int	description	String	Relative standard deviation (RSD) of corrected intensity
attribute	RSD_Corr_Int	long_name	String	RSD Corr Int
attribute	RSD_Corr_Int	units	String	unitless
variable	Conc_Calib		double
attribute	Conc_Calib	_FillValue	double	NaN
attribute	Conc_Calib	actual_range	double	-0.03697121872, 192.5176767
attribute	Conc_Calib	bcodmo_name	String	P
attribute	Conc_Calib	description	String	Calibrated concentration of total phosphorous
attribute	Conc_Calib	long_name	String	Conc Calib
attribute	Conc_Calib	units	String	parts per million (ppm)

Row Type

Variable Name

Attribute Name

Data Type

Value

attribute

NC_GLOBAL

access_formats

String

.htmlTable,.csv,.json,.mat,.nc,.tsv

attribute

NC_GLOBAL

acquisition_description

String

Location: \n Arctic Ocean: P-1-94-AR P21, 84o5' N, 174o58' W \n California margin: W-2-98-NC TF1, 41o5' N, 125o1' W \n Equatorial Pacific: TT013-06MC, 12o00' S, 134o56' W\n \nMethodology:\n \nPrior to the extraction, we freeze-dried, ground and sieved sediment samples\nto less than 125 \\u03bcm (Ruttenberg 1992). For a given sample, we weighed\nfour sample replicates (2 g) and placed each in 250 mL HDPE bottles. Sodium\ndithionite (F.W. 147.12 g/mol; 7.4 g) was added to each sample split, followed\nby 200 mL of citrate-bicarbonate solution (pH 7.6). This step produces\neffervescence, so the solution should be added slowly to the sample. We shook\nsamples for 8 h and then centrifuged them at 3,700 rpm for 15 min. We filtered\nthe supernatants with a 0.4 \\u03bcm polycarbonate filter. We took 20 mL\naliquots from the filtrate for each sample split for MRP and total P analyses,\nand kept them refrigerated until analysis within 24 h. We added 200 mL of\nultrapure water to the solid residue for each sample split as a wash step\nafter the above reductive step, shook samples for 2 h, and then centrifuged\nthem at 3,700 rpm for 15 min. We filtered the supernatants with 0.4 \\u03bcm\npolycarbonate filters and set aside 20 mL of filtrate from each sample split\nfor MRP and total P analyses. We then extracted the solid sample residues in\n200 mL of sodium acetate buffer (pH 4.0) for 6 h. At the end of this\nextraction step, we centrifuged the bottles at 3,700 rpm for 15 min, filtered\nthe supernatants with 0.4 \\u03bcm polycarbonate filters and took a 20 mL\naliquot of filtrate from each sample split for MRP and total P analyses. We\nadded 200 mL of ultrapure water to the solid residue for each sample split as\na wash step, shook samples for 2 h, and then centrifuged them at 3,700 rpm for\n15 min. We filtered the supernatants with 0.4 \\u03bcm polycarbonate filters\nand set aside 20 mL of filtrate from each sample split for MRP and total P\nanalyses. We repeated the water rinse step, and collected aliquots for MRP and\ntotal P analyses as in the previous steps. The concentrations of TP were\ndetermined as described below.\n \nSolid sediment sample residues following the pretreatment described above were\ntransferred to two 50 mL centrifuge tubes (2 sample replicates combined per\ntube). We added 20 mL of 0.25 M NaOH + 0.05 M Na2EDTA solution to each tube,\nvortexed until all sediment was resuspended and then shook samples for 6 h at\nroom temperature (Cade-Menun et al. 2005). We used a solid to solution ratio\nof 1:5 for this step to minimize the amount of freeze-dried material that will\nneed to be dissolved for the 31P NMR experiments. Large amounts of salts from\nthe NaOH-EDTA concentrated in NMR samples lead to higher viscosity and\nincrease line broadening on NMR spectra (Cade-Menun and Liu 2013). We chose an\nextraction time of 6 h to improve total P recovery while limiting the\ndegradation of natural P compounds in the sample. At the end of the\nextraction, samples were centrifuged at 3,700 rpm for 15 min and supernatants\ndecanted into 50 mL centrifuge tubes. We collected a 500 \\u03bcL aliquot from\neach sample, which we diluted with 4.5 mL of ultrapure water. These were\nrefrigerated until analysis for total P content on the ICP-OES. The sample\nresidues and supernatants were frozen on a slant to maximize the exposed\nsurface area during the lyophilization step; this was done immediately after\nthe removal of the 500 \\u03bcL aliquot. Once completely frozen, the uncapped\ntubes containing supernatants and residues were freeze-dried over the course\nof 48 h. Each tube was covered with parafilm with small holes from a tack to\nminimize contamination. Freeze-dried supernatants from identical sample splits\nwere combined and dissolved in 500 \\u03bcL each of ultrapure water, D2O, NaOH-\nEDTA and 10 M NaOH prior to 31P NMR analysis. The D2O is required as signal\nlock in the spectrometer (Cade-Menun and Liu 2013). Sample pH was maintained\nat a pH > 12 to optimize peak separation (Cade-Menun 2005; Cade-Menun and Liu\n2013). Sample pH was assessed with a glass electrode, and verified with pH\npaper to account for the alkaline error caused by the high salt content of our\nsamples (Covington 1985).\n \nFreeze-dried sample residues were ashed in crucibles at 550oC for 2 h and then\nextracted in 25 mL of 0.5 M sulfuric acid for 16 h (Olsen and Sommers 1982;\nCade-Menun and Lavkulich 1997). We centrifuged samples at 3,700 rpm for 15\nmin, filtered supernatants with 0.4 \\u03bcm polycarbonate filters, and\nmeasured P content on an ICP-OES.\n \nTotal P concentrations in sediment extracts were measured using inductively\ncoupled plasma optical emission spectroscopy (ICP-OES). Standards were\nprepared with the same solutions as those used for the extraction procedure in\norder to minimize matrix effects on P measurements. Sediment extracts and\nstandards (0 \\u03bcM, 3.2 \\u03bcM, 32 \\u03bcM and 320 \\u03bcM) were diluted to\nlower salt content to prevent salt buildup on the nebulizer (1:20 dilution for\nstep 1, 1:10 for steps 2 \\u2013 4). Concentration data from both wavelengths\n(213 nm and 214 nm) were averaged to obtain extract concentrations for each\nsample. The detection limit for P on this instrument for both wavelengths is\n0.4 \\u03bcM. The MRP concentrations were measured on a QuikChem 8000 automated\nion analyzer. Standards were prepared with the same solutions used for the\nextraction step to minimize matrix effects on P measurements. Sediment\nextracts and standards (0 \\u2013 30 \\u03bcM PO4) were diluted ten-fold to\nprevent matrix interference with color development. The detection limit for P\non this instrument is 0.2 \\u03bcM. We derived MUP concentrations by\nsubtracting MRP from total P concentrations.

attribute

NC_GLOBAL

awards_0_award_nid

String

554980

attribute

NC_GLOBAL

awards_0_award_number

String

OCE-0939564

attribute

NC_GLOBAL

awards_0_data_url

String

http://www.nsf.gov/awardsearch/showAward?AWD_ID=0939564 (external link)

attribute

NC_GLOBAL

awards_0_funder_name

String

NSF Division of Ocean Sciences

attribute

NC_GLOBAL

awards_0_funding_acronym

String

NSF OCE

attribute

NC_GLOBAL

awards_0_funding_source_nid

String

355

attribute

NC_GLOBAL

awards_0_program_manager

String

David L. Garrison

attribute

NC_GLOBAL

awards_0_program_manager_nid

String

50534

attribute

NC_GLOBAL

cdm_data_type

String

Other

attribute

NC_GLOBAL

comment

String

TP sediments with pretreatment \n PI: A. Paytan \n Data Version 1: 2020-06-23

attribute

NC_GLOBAL

Conventions

String

COARDS, CF-1.6, ACDD-1.3

attribute

NC_GLOBAL

creator_email

String

info at bco-dmo.org

attribute

NC_GLOBAL

creator_name

String

BCO-DMO

attribute

NC_GLOBAL

creator_type

String

institution

attribute

NC_GLOBAL

creator_url

String

https://www.bco-dmo.org/ (external link)

attribute

NC_GLOBAL

data_source

String

extract_data_as_tsv version 2.3 19 Dec 2019

attribute

NC_GLOBAL

dataset_current_state

String

Final and no updates

attribute

NC_GLOBAL

date_created

String

2020-03-02T22:10:22Z

attribute

NC_GLOBAL

date_modified

String

2020-07-02T21:01:27Z

attribute

NC_GLOBAL

defaultDataQuery

String

&time<now

attribute

NC_GLOBAL

doi

String

10.26008/1912/bco-dmo.805226.1

attribute

NC_GLOBAL

infoUrl

String

https://www.bco-dmo.org/dataset/805226 (external link)

attribute

NC_GLOBAL

institution

String

BCO-DMO

attribute

NC_GLOBAL

instruments_0_acronym

String

FIA

attribute

NC_GLOBAL

instruments_0_dataset_instrument_nid

String

805235

attribute

NC_GLOBAL

instruments_0_description

String

An instrument that performs flow injection analysis. Flow injection analysis (FIA) is an approach to chemical analysis that is accomplished by injecting a plug of sample into a flowing carrier stream. FIA is an automated method in which a sample is injected into a continuous flow of a carrier solution that mixes with other continuously flowing solutions before reaching a detector. Precision is dramatically increased when FIA is used instead of manual injections and as a result very specific FIA systems have been developed for a wide array of analytical techniques.

attribute

NC_GLOBAL

instruments_0_instrument_external_identifier

String

https://vocab.nerc.ac.uk/collection/L05/current/LAB36/ (external link)

attribute

NC_GLOBAL

instruments_0_instrument_name

String

Flow Injection Analyzer

attribute

NC_GLOBAL

instruments_0_instrument_nid

String

657

attribute

NC_GLOBAL

instruments_0_supplied_name

String

QuikChem 8000 automated ion analyzer

attribute

NC_GLOBAL

keywords

String

analyte, Analyte_Name, bco, bco-dmo, biological, calib, chemical, conc, Conc_Calib, corr, data, dataset, dilution, dmo, erddap, extract, int, Int_Corr, management, name, oceanography, office, preliminary, rsd, RSD_Corr_Int, sample, Sample_ID, step

attribute

NC_GLOBAL

license

String

https://www.bco-dmo.org/dataset/805226/license (external link)

attribute

NC_GLOBAL

metadata_source

String

https://www.bco-dmo.org/api/dataset/805226 (external link)

attribute

NC_GLOBAL

param_mapping

String

{'805226': {}}

attribute

NC_GLOBAL

parameter_source

String

https://www.bco-dmo.org/mapserver/dataset/805226/parameters (external link)

attribute

NC_GLOBAL

people_0_affiliation

String

University of California-Santa Cruz

attribute

NC_GLOBAL

people_0_affiliation_acronym

String

UC Santa Cruz

attribute

NC_GLOBAL

people_0_person_name

String

Adina Paytan

attribute

NC_GLOBAL

people_0_person_nid

String

50821

attribute

NC_GLOBAL

people_0_role

String

Principal Investigator

attribute

NC_GLOBAL

people_0_role_type

String

originator

attribute

NC_GLOBAL

people_1_affiliation

String

University of California-Santa Cruz

attribute

NC_GLOBAL

people_1_affiliation_acronym

String

UC Santa Cruz

attribute

NC_GLOBAL

people_1_person_name

String

Dr Delphine Defforey

attribute

NC_GLOBAL

people_1_person_nid

String

664058

attribute

NC_GLOBAL

people_1_role

String

Co-Principal Investigator

attribute

NC_GLOBAL

people_1_role_type

String

originator

attribute

NC_GLOBAL

people_2_affiliation

String

Woods Hole Oceanographic Institution

attribute

NC_GLOBAL

people_2_affiliation_acronym

String

WHOI BCO-DMO

attribute

NC_GLOBAL

people_2_person_name

String

Amber D. York

attribute

NC_GLOBAL

people_2_person_nid

String

643627

attribute

NC_GLOBAL

people_2_role

String

BCO-DMO Data Manager

attribute

NC_GLOBAL

people_2_role_type

String

attribute

NC_GLOBAL

project

String

Marine Sediment Analysis 31P NMR

attribute

NC_GLOBAL

projects_0_acronym

String

Marine Sediment Analysis 31P NMR

attribute

NC_GLOBAL

projects_0_description

String

We developed and tested a new approach to prepare marine sediment samples for solution 31P nuclear magnetic resonance spectroscopy (31P NMR). This approach addresses the effects of sample pretreatment on sedimentary P composition and increases the signal of low abundance P species in 31P NMR spectra by removing up the majority inorganic P from sediment samples while causing minimal alteration of the chemical structure of organic P compounds. The method was tested on natural marine sediment samples from different localities (Equatorial Pacific, California Margin and Arctic Ocean) with high inorganic P content, and allowed for the detection of low abundance P forms in samples for which only an orthophosphate signal could be resolved with an NaOH-EDTA extraction alone. This new approach will allow the use of 31P NMR on samples for which low organic P concentrations previously hindered the use of this tool, and will help answer longstanding question regarding the fate of organic P in marine sediments. We developed and tested a new approach to prepare marine sediment samples for solution 31P nuclear magnetic resonance spectroscopy (31P NMR). This approach addresses the effects of sample pretreatment on sedimentary P composition and increases the signal of low abundance P species in 31P NMR spectra by removing up the majority inorganic P from sediment samples while causing minimal alteration of the chemical structure of organic P compounds. The method was tested on natural marine sediment samples from different localities (Equatorial Pacific, California Margin and Arctic Ocean) with high inorganic P content, and allowed for the detection of low abundance P forms in samples for which only an orthophosphate signal could be resolved with an NaOH-EDTA extraction alone. This new approach will allow the use of 31P NMR on samples for which low organic P concentrations previously hindered the use of this tool, and will help answer longstanding question regarding the fate of organic P in marine sediments. \nNSF C-DEBI Award #156246 to Dr. Adina Paytan\nNSF C-DEBI Award #157598 to Dr. Delphine Defforey

attribute

NC_GLOBAL

projects_0_geolocation

String

Equatorial Pacific, California Margin, Arctic Ocean

attribute

NC_GLOBAL

projects_0_name

String

A new marine sediment sample preparation scheme for solution 31P NMR analysis

attribute

NC_GLOBAL

projects_0_project_nid

String

664054

attribute

NC_GLOBAL

publisher_name

String

Biological and Chemical Oceanographic Data Management Office (BCO-DMO)

attribute

NC_GLOBAL

publisher_type

String

institution

attribute

NC_GLOBAL

sourceUrl

String

(local files)

attribute

NC_GLOBAL

standard_name_vocabulary

String

CF Standard Name Table v55

attribute

NC_GLOBAL

summary

String

Total phosphorus concentrations in nuclear magnetic resonance (NMR) sediment pretreatment extracts from samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998.

attribute

NC_GLOBAL

title

String

Total phosphorus concentrations in NMR sediment pretreatment extracts from samples collected during cruises in the Arctic Ocean, California Margin, and Equatorial Pacific from 1992-1998

attribute

NC_GLOBAL

version

String

attribute

NC_GLOBAL

xml_source

String

osprey2erddap.update_xml() v1.5

variable

Extract

String

attribute

Extract

bcodmo_name

String

sample_descrip

attribute

Extract

description

String

Extract solution

attribute

Extract

long_name

String

Extract

attribute

Extract

units

String

unitless

variable

Step

String

attribute

Step

bcodmo_name

String

sample_descrip

attribute

Step

description

String

Step in the sequential extraction scheme (1-4)

attribute

Step

long_name

String

Step

attribute

Step

units

String

unitless

variable

Dilution

String

attribute

Dilution

bcodmo_name

String

sample_descrip

attribute

Dilution

description

String

Sample dilution

attribute

Dilution

long_name

String

Dilution

attribute

Dilution

units

String

unitless

variable

Sample_ID

String

attribute

Sample_ID

bcodmo_name

String

sample

attribute

Sample_ID

description

String

Sample ID, unique sample identifier

attribute

Sample_ID

long_name

String

Sample ID

attribute

Sample_ID

nerc_identifier

String

https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)

attribute

Sample_ID

units

String

unitless

variable

Analyte_Name

String

attribute

Analyte_Name

bcodmo_name

String

sample_descrip

attribute

Analyte_Name

description

String

Element analyzed

attribute

Analyte_Name

long_name

String

Analyte Name

attribute

Analyte_Name

units

String

unitless

variable

Int_Corr

String

attribute

Int_Corr

bcodmo_name

String

unknown

attribute

Int_Corr

description

String

Intensity (corrected)

attribute

Int_Corr

long_name

String

Int Corr

attribute

Int_Corr

units

String

unitless

variable

RSD_Corr_Int

double

attribute

RSD_Corr_Int

_FillValue

double

NaN

attribute

RSD_Corr_Int

actual_range

double

-0.001279317841, 1840331.376

attribute

RSD_Corr_Int

bcodmo_name

String

unknown

attribute

RSD_Corr_Int

description

String

Relative standard deviation (RSD) of corrected intensity

attribute

RSD_Corr_Int

long_name

String

RSD Corr Int

attribute

RSD_Corr_Int

units

String

unitless

variable

Conc_Calib

double

attribute

Conc_Calib

_FillValue

double

NaN

attribute

Conc_Calib

actual_range

double

-0.03697121872, 192.5176767

attribute

Conc_Calib

bcodmo_name

String

attribute

Conc_Calib

description

String

Calibrated concentration of total phosphorous

attribute

Conc_Calib

long_name

String

Conc Calib

attribute

Conc_Calib

units

String

parts per million (ppm)

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