Environmental Health

Table 1 Certified mean values (mg kg-1) for Montana I (SRM 2710a) soil reference material and the mean values we found for selected elements from this sample following aqua regia digestion.

From: Risk of human exposure to arsenic and other toxic elements from geophagy: trace element analysis of baked clay using inductively coupled plasma mass spectrometry

Element	As	Cd	Fe	Mn	Pb	Zn
Certified value	1540 ± 100	12.3 ± 0.3	43200 ± 800	2140 ± 60	5520 ± 30	4180 ± 150
Found value	1430 ± 90	11.3 ± 0.7	34500 ± 320	1610 ± 70	5580 ± 240	3760 ± 80
% Recovery	93	90	80	75	101	80
Detection limit^a	0.1	0.002	3.9	0.1	0.3	1.3

^a Detection limits were calculated as 3 × standard deviation (3 × Std. Dev.) of blank values.

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ISSN: 1476-069X

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