Table 1:

Quality assurance and quality control data for element analysis.

Element	LODa	PQLb	Calibration Blankc n=5	Duplicate (RPD) (%) n=1	LCS Recovery (%) n=1	Spike Recovery (%) n=1	SRMd Recovery (%) DORM-3/DOLT-4 n=1
Aluminum (Al)	2.3	18.0	NDe	3.6	95.1	98.3	87.3
Antimony (Sb)	0.05	0.18	ND	BDL	103.4	109.9	N/A
Arsenic (As)	0.09	0.18	ND	BDL	97.9	107.6	99.8
Barium (Ba)	0.09	0.18	ND	5.9	98.1	104.9	N/A
Beryllium (Be)	0.02	0.19	ND	BDL	108.3	105.6	N/A
Cadmium (Cd)	0.02	0.18	ND	BDL	94.4	101.3	102.5
Chromium (Cr)	0.18	0.46	ND	8.9	107.8	94.7	116.7
Cobalt (Co)	0.02	0.18	ND	BDL	97.1	98.8	N/A
Copper (Cu)	0.05	0.18	ND	13.8	93.7	97.4	86.6
Gold (Au)	0.09	0.18	ND	BDL	95.9	96.8	N/A
Iron (Fe)	2.30	18.0	ND	1.5	92.0	95.6	92.5
Lead (Pb)	0.05	0.18	ND	4.2	93.3	97.3	107.9
Lithium (Li)	0.05	0.18	ND	BDL	106.2	106.1	N/A
Magnesium (Mg)	2.30	18.0	ND	9.6	96.4	97.4	N/A
Manganese (Mn)	0.02	0.18	ND	18.7	104.6	106.0	80.9
Mercury (Hg)	0.02	0.02	ND	99.4	96.7	105.1	98.8
Molybdenum (Mo)	0.02	0.18	ND	BDL	105.4	108.5	N/A
Nickel (Ni)	0.05	0.18	ND	19.6	95.2	95.8	88.3
Selenium (Se)	0.05	0.18	ND	1.9	101.4	104.4	103.2
Silver (Ag)	0.02	0.18	ND	BDL	107.2	110.7	92.9
Strontium (Sr)	0.02	0.18	ND	1.5	104.0	112.4	N/A
Tin (Sn)	0.05	0.18	ND	13.6	110.0	115.0	N/A
Titanium (Ti)	0.05	0.18	ND	17.9	112.1	110.3	N/A
Uranium (U)	0.02	0.18	ND	BDL	103.1	105.9	N/A
Zinc (Zn)	0.18	0.92	ND	13.9	97.2	107.7	98.2

^aLOD = limit of detection (ppm, mean)

^bPQL = project quantitation limit (ppm, mean)

^cCalibration blank: ppm, mean

^dSRM = standard reference material

^eND = not detected