Table 3.
Consensus values for Mn in NIST SRM 955c – Level 1 as determined by (a) all labs: CDC, CTQ, and NYS, and (b) all-methods.
| (a) All labs
| |||
|---|---|---|---|
| Lab | Mean [Mn] (μg L−1) | U (μg L−1) | n (days) |
| CDC DRCII | 16.6 | 0.3 | 13 |
| CTQ DRCII/NexION | 16.4 | 0.7 | 8 |
| NYS DRCII | 16.0 | 0.4 | 5 |
|
| |||
| NYS DRCII (Standard additions) | 16.2 | 1.2 | 1 |
|
| |||
| All-lab consensus value: | 16.3 | 0.8 | |
| (b) All methods
| |||
|---|---|---|---|
| Method | Mean [Mn] (μg L−1) | U (μg L−1) | n (days) |
| NYS SF-ICP-MS (Dig+Aqueous calibration) | 16.7 | 0.5 | 4 |
| NYS GFAAS (Dig+Aqueous calibration) | 16.0 | 0.5 | 16 |
|
| |||
| All lab DRC-ICP-MS | 16.3 | 0.8 | 24 |
| All-method consensus value: | 16.3 | 0.9 | |