Table 6 Percent recovery of reference material by digestion (Expected values)
From: Evaluation of heavy metals content in dietary supplements in Lebanon
|  | As (μg/g) | Cd (μg/g) | Cr (μg/g) | Hg (μg/) | Pb (μ/g) |
|---|---|---|---|---|---|
Tomato leave Certified (NIST 1573a) | 0.112 ± 0.004 | 1.52 ± 0.04 | 1.99 ± 0.06 | 0.034 ± 0.004 | - |
Measurement | 0.111 ± 0.008 | 1.55 ± 0.06 | 1.95 ± 0.05 | 0.033 ± 0.006 | - |
% Recovery | 99 | 101 | 98 | 97 | - |
Soil Certified (NIST 2586) | 8.7 ± 1.5 | 2.71 ± 0.54 | 301 ± 45 | 0.367 ± 0.038 | 432 ± 17 |
Measurement | 7.9 ± 2.1 | 2.49 ± 0.47 | 268 ± 27 | 0.342 ± 0.027 | 411 ± 24 |
% Recovery | 91 | 92 | 89 | 93 | 95 |