Table 9 Uncertainty components of Cr in plant aqueous extracts and mass fraction in plant dry mass
Symbol | Unit | Plant aqueous extracts | Plant dry mass | ||||
|---|---|---|---|---|---|---|---|
Value | Standard uncertainty | r i | Value | Standard uncertainty | r i | ||
C 1 | mg L−1 | 0.00 | 0.004 | 0.5 | 0.00 | 0.004 | 0.5 |
C 2 | mg L−1 | 0.05 | 0.004 | 0.5 | 0.05 | 0.004 | 0.5 |
C 3 | mg L−1 | 0.10 | 0.004 | 0.4 | 0.10 | 0.004 | 0.5 |
C 4 | mg L−1 | 0.20 | 0.004 | 0.4 | 0.20 | 0.004 | 0.4 |
C 5 | mg L−1 | 0.40 | 0.004 | 0.3 | 0.40 | 0.004 | 0.3 |
C 6 | mg L−1 | 0.60 | 0.004 | 0.3 | 0.60 | 0.004 | 0.3 |
C 7 | mg L−1 | 0.80 | 0.004 | 0.0 | 0.80 | 0.004 | 0 |
C 8 | mg L−1 | 1.00 | 0.004 | 0.1 | 1.00 | 0.004 | 0.1 |
A 1 | - | 20,190 | 3,028 | 0.4 | 20,190 | 3,028 | 0.4 |
A 2 | - | 55,030 | 1,045 | 0.0 | 55,030 | 1,045 | 0 |
A 3 | - | 95,540 | 840 | 0.0 | 95,540 | 840 | 0 |
A 4 | - | 181,800 | 1,181 | 0.0 | 181,800 | 1,181 | 0 |
A 5 | - | 355,180 | 1,882 | 0.0 | 355,180 | 1,882 | 0 |
A 6 | - | 529,800 | 3,284 | 0.2 | 529,800 | 3,284 | 0.2 |
A 7 | - | 703,882 | 3,097 | 0.1 | 703,882 | 3,097 | 0.1 |
A 8 | - | 880,011 | 5,104 | 0.1 | 880,011 | 5,104 | 0.1 |
A | - | 255,400 | 1,127 | 0.1 | 31,140 | 4,670 | 0.1 |
R | - | 1.00 | 0.015 | 20.4 | 1.00 | 0.027 | 35.8 |
F rep | - | 1.00 | 0.029 | 76.2 | 1.00 | 0.029 | 60.7 |
C m | g L−1 | - | - | - | 10 | 0.001 | 0.0 |
Result |  | 0.283 mg L−1 | 0.019 mg L−1 (6.7%, k = 2) |  | 2.53 mg kg−1 | 0.202 mg kg−1 (9.0%, k = 2) |  |