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 |