Table 2.
Linear ranges, regression equations, correlation coefficients, recovery, limit of detection (LOD) and limit of quantitation (LOQ) (n = 6).
| Compounds | Regression equations a | Correlation coefficient (R2 b) | 1 μg/kg c | 2.5 μg/kg | 10 μg/kg | LOD d | LOQ e | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Recovery/% | RSD/% | Recovery/% | RSD/% | Recovery/% | RSD/% | (μg/kg) | (μg/kg) | |||
| IPMP | y = 19798x-s1324 | 0.9959 | 96.83 | 19.24 | 106.17 | 15.08 | 100.41 | 13.85 | 0.05 | 0.16 |
| IBMP | y = 49201x-16269 | 0.9932 | 103.78 | 11.55 | 103.63 | 6.04 | 92.01 | 12.95 | 0.02 | 0.08 |
| 2MIB | y = 18217x-3576 | 0.9982 | 105.13 | 19.11 | 103.52 | 5.36 | 106.28 | 6.09 | 0.14 | 0.46 |
| GSM | y = 27751x-2917 | 0.9956 | 104.13 | 12.41 | 100.51 | 7.47 | 97.34 | 14.07 | 0.06 | 0.21 |
| TCA | y = 11988x-2,495 | 0.9989 | 108.06 | 9.02 | 113.08 | 7.3 | 109.87 | 15.43 | 0.01 | 0.03 |
a Expressed as the mass ratio (m:m) of the earthy substance to the sample.
b The regression equation was calculated after deducting the background value of the matrix sample.
c Spiked concentration.
d Based on S/N = 3.
e Based on S/N = 10.