Table 7.
Measured results for Mn and Se in reference materials from Institut national de santé publique Quebec, and Health Research Inc.
| Reference material ID |
Analyte | Target value ( ± 1 SD) |
Observed mean conc. ( ± 1 SD) |
% Bias | N |
|---|---|---|---|---|---|
| QMEQAS08B-05a | Mn (μg L−1) | 9.3 ± 0.62 | 9.17 ± 0.55 | −1.4% | 15 |
| BE11-03b | 13.2 ± 1.6 | 13.3 ± 0.9 | 0.4% | 8 | |
| QMEQAS08B-08a | 17.7 ± 1.2 | 16.3 ± 0.8 | −7.8% | 15 | |
| QMEQAS10B-03a | 21.6 ± 1.4 | 20.7 ± 1.0 | −4.3% | 15 | |
| QMEQAS10B-06a | 41.2 ± 3.4 | 41.7 ± 2.7 | 1.3% | 8 | |
| BE10-12b | 54.1 ± 4.8 | 54.1 ± 2.9 | −0.1% | 8 | |
| QMEQAS08B-08a | Se (μg L−1) | 165 ± 11 | 157 ± 9 | −5.0% | 15 |
| QMEQAS10B-06a | 239 ± 19 | 248 ± 11 | 3.7% | 8 | |
| QMEQAS08B-05a | 260 ± 17 | 242 ± 12 | −6.8% | 15 | |
| BE10-14b | 367 ± 28 | 372 ± 14 | 1.3% | 8 | |
| BE11-03b | 421 ± 43 | 416 ± 17 | −1.3% | 8 | |
| QMEQAS10B-03a | 627 ± 42 | 606 ± 28 | −3.4% | 15 |
a
Sample from CTQ (Quebec, Canada).
b
Sample from the Wadsworth Center (Albany, NY).