Table 2. Whole-method accuracy, determined for spiked concentrations ([Spike]), and relative standard deviation (RSD) outline the method performance in each matrix Limit of detection (LOD) and quantitation (LOQ) values for analytes in each matrix.
| Waste Water Influent | Waste Water Effluent | Willamette River Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analyte | Accuracy* (%) |
[Analyte] (ng/L) |
RSD† (%) |
LOD (ng/L) |
LOQ (ng/L) |
Analyte | Accuracy* (%) |
[Analyte] (ng/L) |
RSD† (%) |
LOD (ng/L) |
LOQ (ng/L) |
Analyte | Accuracy* (%) |
[Analyte] (ng/L) |
RSD† (%) |
LOD (ng/L) |
LOQ (ng/L) |
| Test | 108 ± 5.5 | 90 | 4.5 | 6.2 | 19 | Test | 101 ± 2.5 | 75 | 2.2 | 4.8 | 15 | Test | 99.2 ± 6.3 | 10 | 5.7 | 1.2 | 3.7 |
| Ando | 87.6 ± 6.2 | 60 | 6.3 | 6.2 | 19 | Ando | 101 ± 5.1 | 75 | 4.6 | 5.0 | 15 | Ando | 106 ± 3.4 | 15 | 2.9 | 1.5 | 4.5 |
| Bold | 98.4 ± 6.3 | 60 | 5.7 | 8.5 | 26 | Bold | 101 ± 3.8 | 75 | 3.4 | 6.2 | 19 | Bold | 108 ± 5.0 | 10 | 4.1 | 2.3 | 7.1 |
| 5-Andro | 78.6 ± 7.8 | 1600 | 8.8 | 120 | 360 | 5-Andro | 86 ± 3.5 | 2000 | 3.7 | 100 | 300 | 5-Andro | 95.7 ± 3.8 | 89 | 3.5 | 12 | 35 |
| Meta | 108 ± 8.9 | 200 | 7.3 | 18 | 54 | Meta | 104 ± 2.5 | 250 | 3.7 | 13 | 41 | Meta | 105 ± 6.3 | 22 | 3.3 | 3.8 | 12 |
| 6-Meta | 62.3 ± 3.9 | 1600 | 5.6 | 360 | 1100 | 6-Meta | 76.4 ± 8.4 | 2000 | 9.8 | 150 | 470 | 6-Meta | 80.7 ± 7.5 | 89 | 8.2 | 28 | 83 |
| Stan | 107 ± 7.6 | 200 | 6.4 | 11 | 33 | Stan | 107 ± 3.3 | 250 | 2.8 | 17 | 52 | Stan | 103 ± 4.6 | 22 | 4.0 | 3.2 | 9.8 |
| 16-Stan | 101 ± 5.7 | 200 | 5.1 | 19 | 58 | 16-Stan | 103 ± 4.2 | 250 | 3.6 | 17 | 76 | 16-Stan | 104 ± 4.2 | 22 | 3.6 | 3.3 | 10 |
| Tren | 96.6 ± 5.2 | 200 | 5.6 | 28 | 85 | Tren | 96.3 ± 6.9 | 250 | 6.3 | 19 | 57 | Tren | 93.9 ± 5.1 | 22 | 4.8 | 3.7 | 11 |
| Epi Tren | 93.9 ± 2.2 | 200 | 2.1 | 31 | 95 | Epi Tren | 100 ± 5.0 | 250 | 4.5 | 20 | 62 | Epi Tren | 98.2 ± 7.0 | 22 | 6.4 | 4.4 | 13 |
| Mete | 94.3 ± 8.5 | 200 | 8.1 | 22 | 67 | Mete | 96.3 ± 6.0 | 250 | 5.6 | 20 | 60 | Mete | 105 ± 8.4 | 22 | 7.1 | 4.3 | 13 |
| CH3-Test | 102 ±2.9 | 200 | 2.5 | 13 | 40 | CH3-Test | 102 ± 4.3 | 250 | 3.7 | 7.9 | 24 | CH3-Test | 99.5 ± 4.8 | 22 | 4.3 | 1.8 | 5.3 |
| Nand | 104 ± 8.3 | 200 | 7.2 | 23 | 68 | Nand | 96.8 ± 3.7 | 250 | 3.4 | 19 | 57 | Nand | 101 ± 2.7 | 22 | 2.4 | 3.2 | 9.8 |
| THG | 102 ± 9.9 | 200 | 8.7 | 8.1 | 24 | THG | 97.6 ± 7.0 | 250 | 6.4 | 8.0 | 24 | THG | 105 ± 2.3 | 22 | 1.9 | 1.8 | 5.6 |
| Ox | 103 ± 1.4 | 750 | 1.2 | 100 | 310 | Ox | 102 ± 4.8 | 1000 | 4.2 | 82 | 250 | Ox | 107 ± 8.1 | 89 | 6.8 | 19 | 58 |
| Epi-Ox | 84.8 ± 7.2 | 1600 | 7.6 | 210 | 620 | Epi-Ox | 93.4 ± 9.6 | 2000 | 9.2 | 120 | 360 | Epi-Ox | 103 ± 6.8 | 89 | 5.9 | 18 | 54 |
*
Accuracy is calculated as the average (n = 4, ± 95% CI) percent calculated internal standard calibration concentration over the spiked concentration ([Spike]).
†
Relative standard deviation was calculated from concentration values used to determine accuracy (n = 4).