SOFIA - OFR-00-327 - Table 2 (print version)

U.S. Department of the Interior
U.S. Geological Survey
OFR-00-327

Regional Geochemistry of Metals in Organic-Rich Sediments, Sawgrass and Surface Water, from Taylor Slough, Florida

Table 2. Analytical methods and the approximate lower limits of determination for the concentration of elements in plants, organic-rich sediments, and water.

Element ICP-AES ICP-MS Element ICP-AES ICP-MS

Plant* Sediment** Water Plant* Sediment** Water

Al 0.01% 0.005% NA Ho 8ppm 4ppm 0.1ppb

Ca 0.01% 0.005% NA La 4ppm 2ppm 0.1ppb

Fe 0.01% 0.005% NA Li 4ppm 2ppm 2ppb

Mg 0.01% 0.005% NA Mn 8ppm 4ppm 0.5ppb

Na 0.01% 0.005% NA Mo 4ppm 2ppm 0.1ppb

P 0.01% 0.005% NA Nb 8ppm 4ppm 0.2ppb

Ti 0.01% 0.005% NA Nd 8ppm 9ppm 0.2ppb

K 0.10% 0.005% NA Ni 4ppm 3ppm 0.5ppb

Ag 4 ppm 2 ppm 4 ppb Pb 8ppm 4ppm 0.3ppb

As 20 ppm 10 ppm 1 ppb Sc 4ppm 2ppm 0.8ppb

Au 20 ppm 8 ppm 0.1 ppb Si NA NA NA

B NA NA NA Sn 20ppm 5ppm 0.2ppb

Ba 2ppm 1ppm 0.5ppb Sr 4ppm 2ppm 1.0ppb

Be 2ppm 1ppm 0.1ppb Ta 80ppm 40ppm 0.1ppb

Bi 20ppm 10ppm 0.7ppb Th 8ppm 6ppm 1ppb

Cd 4ppm 2ppm 0.2ppm U 200ppm 100ppm 0.1ppb

Ce 8ppm 5ppm 0.1ppb V 4ppm 2ppm 0.5ppb

Co 2ppm 2ppm 0.1ppb W NA NA 0.1ppb

Cr 2ppm 2ppm 0.5ppb Y 4ppm 2ppm 0.8ppb

Cu 2ppm 2ppm 2.0ppb Yb 2ppm 1ppm 0.7ppb

Eu 4ppm 2ppm 0.1ppb Zn 4ppm 2ppm 4.0ppb

Ga 8ppm 4ppm 0.3ppb Zr NA NA 0.1ppb

Ge NA NA 0.3ppb

Table 2. Analytical methods and the approximate lower limits of determination for the concentration of elements in plants, organic-rich sediments, and water.
Element	ICP-AES	ICP-MS		Element	ICP-AES	ICP-MS
Plant*	Sediment**	Water	Plant*	Sediment**	Water
Al	0.01%	0.005%	NA	Ho	8ppm	4ppm	0.1ppb
Ca	0.01%	0.005%	NA	La	4ppm	2ppm	0.1ppb
Fe	0.01%	0.005%	NA	Li	4ppm	2ppm	2ppb
Mg	0.01%	0.005%	NA	Mn	8ppm	4ppm	0.5ppb
Na	0.01%	0.005%	NA	Mo	4ppm	2ppm	0.1ppb
P	0.01%	0.005%	NA	Nb	8ppm	4ppm	0.2ppb
Ti	0.01%	0.005%	NA	Nd	8ppm	9ppm	0.2ppb
K	0.10%	0.005%	NA	Ni	4ppm	3ppm	0.5ppb
Ag	4 ppm	2 ppm	4 ppb	Pb	8ppm	4ppm	0.3ppb
As	20 ppm	10 ppm	1 ppb	Sc	4ppm	2ppm	0.8ppb
Au	20 ppm	8 ppm	0.1 ppb	Si	NA	NA	NA
B	NA	NA	NA	Sn	20ppm	5ppm	0.2ppb
Ba	2ppm	1ppm	0.5ppb	Sr	4ppm	2ppm	1.0ppb
Be	2ppm	1ppm	0.1ppb	Ta	80ppm	40ppm	0.1ppb
Bi	20ppm	10ppm	0.7ppb	Th	8ppm	6ppm	1ppb
Cd	4ppm	2ppm	0.2ppm	U	200ppm	100ppm	0.1ppb
Ce	8ppm	5ppm	0.1ppb	V	4ppm	2ppm	0.5ppb
Co	2ppm	2ppm	0.1ppb	W	NA	NA	0.1ppb
Cr	2ppm	2ppm	0.5ppb	Y	4ppm	2ppm	0.8ppb
Cu	2ppm	2ppm	2.0ppb	Yb	2ppm	1ppm	0.7ppb
Eu	4ppm	2ppm	0.1ppb	Zn	4ppm	2ppm	4.0ppb
Ga	8ppm	4ppm	0.3ppb	Zr	NA	NA	0.1ppb
Ge	NA	NA	0.3ppb

Element Cold Vapor AA

Plant** Sediment** Water

Hg 20ppb 20ppb 0.2ppb

* concentrations are on an ash weight basis; ** concentrations are on a dry weight basis
NA = not applicable (either not determined or data obtained was not used in this study)
% = percent; ppb = parts per billion (µg/L or µg/kg); ppm = parts per million (mg/L or µg/g)

Element	Cold Vapor AA
Plant**	Sediment**	Water
Hg	20ppb	20ppb	0.2ppb

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Last updated: 17 March, 2005 @ 02:19 PM (KP)