Table 1.
Mean of the median nanoparticle sizes and their associated standard deviation, repeatability (sr), between-day variation (sd), and intermediate precision (sip). Contributions of the trueness uncertainty (ut), within-day (ur), and between-day (ud) uncertainty to the expanded uncertainty (U) on the measurement of the median size by TEM (Feret-min) and spICP-MS (ESD) under routine measurement conditions (1 replicate × 1 day for Feret-min and 3 replicates × 1 day for ESD).
| Routine Conditions | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample | Sample Code | Size Parameter | Mean of Median Size (nm) | Stdev (nm) | sr (%) | sd (%) | sip (%) | ut (%) | ur (%) | ud (%) | U (k = 2; %) |
| Aqueous dispersion of AgNP | NM-300K | Feret-min | 15.4 | 0.5 | 2.4 | 2.5 | 3.4 | 4.8 | 2.4 | 2.5 | 12 |
| ESD | 15.3 | 0.4 | 0.9 | 2.8 | 3.0 | 6.0 | 0.5 | 2.8 | 13 | ||
| E174 2-mm flakes | Ag-005 | ESD | 26.7 | 1.3 | 11 | 7.3 | 13 | 6.0 | 6.3 | 7.3 | 23 |
| E174 8-cm leaves | Ag-008 | ESD | 18.7 | 1.5 | 4.2 | 7.8 | 8.9 | 6.0 | 2.4 | 7.8 | 20 |
| Silver pearls containing E174 | Ag-P-002 | ESD | 19.4 | 0.7 | 5.5 | 1.5 | 5.7 | 6.0 | 3.2 | 1.5 | 14 |
| Silver-coated chocolates containing E174 | Ag-P-003 | ESD | 22.5 | 1.2 | 6.2 | 3.4 | 7.1 | 6.0 | 3.6 | 3.4 | 16 |