1E3 - Aqua Regia - ICP

0.5 g of sample is digested with aqua regia for 2 hours at 95 ° C. Sample is cooled then diluted with deionized water. The samples are then analyzed using a Varian ICP for the 35 element suite. QC for the digestion is 15% for each batch, 2 method reagent blanks, 6 in-house controls, 8 sample duplicates and 5 certified reference materials. An additional 20% QC is performed as part of the instrumental analysis to ensure quality in the areas of instrumental drift.

Code 1E3 Elements and Detection Limits (ppm)

Element	Detection Limit	Upper Limit	Element	Detection Limit	Upper Limit	Element	Detection Limit	Upper Limit
Ag	0.2	100	Ga*	10	-	Sb*	2	-
Al*	0.01%	-	Hg	1	-	Sc*	1	-
As*	2	10,000	K*	0.01%	-	Sr*	1	-
B*	10	-	La*	10	-	Te*	1	500
Ba*	10	-	Mg*	0.01%	-	Ti*	0.01%	-
Be*	0.5	-	Mn*	5	100,000	Tl*	2	-
Bi	2	-	Mo*	1	10,000	U	10	-
Ca*	0.01%	-	Na*	0.001%	-	V*	1	-
Cd	0.5	2,000	Ni*	1	10,000	W*	10	-
Co*	1	10,000	P*	0.001%	-	Y*	1	-
Cr*	1	-	Pb	2	5,000	Zn*	2	10,000
Cu	1	10,000	S	0.01%	20%	Zr*	1	10,000
Fe*	0.01%	-

Notes:

* Element may only be partially extracted.

Assays are recommended for values which exceed the upper limits.