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Table 3 Determination of Arsenic in sikor samples.

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

Sample

Total As in sikor material

(mg kg-1)

Extracted As from sikor

(mg kg-1)

Extraction

Efficiencya (%)

As Species (mg kg-1)

Column

Recoveryb (%)

 

Mean

SD

Mean

SD

Mean

SD

AsIII

AsV

Mean

SD

S1

7.2

0.3

2.31

0.02

32

0.2

< LOD

1.91

83

6

S2

6.7

0.5

2.07

0.12

31

1.8

< LOD

1.57

76

1

S3

6.3

0.4

2.07

0.05

33

0.8

< LOD

1.12

54

10

S4

7.4

0.6

2.71

0.06

37

0.7

< LOD

1.21

45

5

S5

5.5

0.3

1.87

0.01

34

1.2

< LOD

1.03

55

10

S6

7.1

0.5

2.18

0.07

31

0.9

< LOD

1.64

75

4

S7

8.1

0.7

2.78

0.04

34

0.9

< LOD

1.87

67

5

S8

7.4

0.4

2.28

0.03

31

0.8

< LOD

1.88

82

3

  1. a Extraction efficiency based on percentage of As which is extracted from sikor samples relative to the total As present in the material. b Column recovery refers to As species recovered from the column as a percentage of the total As in the extract. < LOD = not detected or low limit of detection. SD: standard deviation. All the data presented were obtained for duplicate samples.