Table 1 Recoveries of QL-MI (n = 20)
Original sample conc. (mg/L) | Added conc. (mg/L) | Recovered conc. (mg/L) | Recovery (%) | ||
|---|---|---|---|---|---|
one-step format | two-step format | one-step format | two-step format | ||
0.91(0.01)a | 0.89(0.05) | 0.87(0.04) | 98.92(1.34) | 96.73(1.27) | |
6.32(0.07) | 5.01(0.09) | 5.21(0.07) | 4.89(0.06) | 104.21 (2.11) | 97.81(2.48) |
20.31(0.15) | 20.82(0.18) | 20.03(0.13) | 102.62(2.14) | 98.72(3.06) | |
150.01 (2.25) | 154.23 (4.12)b | 146.64(2.13)b | 102.82(3.21) | 97.81(2.76) | |