Considered parameters | ||||
---|---|---|---|---|
Stage | Time (s) | Intensity (μA) | Comp (10 mV) | Conductometric detector |
1 | 50 | 80 | 0 | |
2 | 70 | 120 | 50 | |
3 | 20 | 90 | 0 | X |
4 | 250 | 50 | 50 | |
5 | 325 | 120 | 0 | X |
Analyte | Linearity determination coefficient above 0.9987 |
Coefficient of variation n = 6, the samples were analyzed twice |
Limit of detection calculated from the limit of identification and coefficients of the calibration curve |
Limit of quantification LOQ = 3.3 x LOD |
Recovery the sample was enriched with 4 ml of a solution containing 2 μg fil-1 of the examined ion, n = 6 |
---|---|---|---|---|---|
( |
3.1–50.4 | 3.0–4.2 | 2.2 | 7.3 | 91 ± 5 |
( |
2.8–49.6 | 3.2–4.5 | 2.1 | 6.9 | 92 ± 3 |
( |
2.9–51.3 | 2.8–4.1 | 2.3 | 7.6 | 92 ± 4 |
Type of extraction column | Mean recovery values and SD (%) | ||
---|---|---|---|
(72) | (73) | (79) | |
RP Si–C18 | 85.3 ± 4.2 | 84.7 ± 3.9 | 85.1 ± 3.5 |
RP Si–C8 | 82.2 ± 4.3 | 82.9 ± 4.9 | 83.7 ± 4.6 |
RP Si–FP | 89.3 ± 3.9 | 91.3 ± 3.6 | 93.9 ± 4.1 |
Parameters of the method | |
---|---|
UV filter (nm) | 200 |
High Voltage Limit (kV) | 12 |
Sample rate (smp s−1) | 50 |
Polarity | + cations |