substance	Protein	TCHO	URA
unitless	unitless (percent)	unitless (percent)	unitless (percent)
NAEPS	32.4	32.1	10.5
AEPS	8.1	5.2	2.9
Frustule	3.2	17.7	19.5
EDTA	22.9	36.4	11.5
SDS	33.4	8.6	55.7