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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.