Table 3 Performance parameters of the method to quantify selected alkaloids
Alkaloids | Correlation coefficient (R2) | Sensitivity (slope)a | LOD (µg/L) | LOQ (µg/L) | Recovery % ± SEb | ME % | ||||
|---|---|---|---|---|---|---|---|---|---|---|
Soil | Waterc | Soil | Water | |||||||
Sandy soil | Sandy loam soil | Glass fibre | ||||||||
Angustifoline | 0.989 | y = 148x | 0.09 | 0.20 | 89 ± 6 | 79  ±  9 | 96 ± 7 | 92 ± 4 | 11 | 7 |
Cytisine | 0.997 | y = 74x | 1.20 | 3.44 | 92 ± 8 | 84 ± 9 | 96 ± 5 | 90 ± 5 | 11 | 8 |
Gramine | 0.990 | y = 33x | 0.02 | 0.38 | 90 ± 11 | 81 ± 9 | 95 ± 6 | 94 ± 7 | 10 | 12 |
Hydroxylupanine | 0.993 | y = 58x | 0.25 | 0.64 | 87 ± 7 | 72 ± 7 | 92 ± 5 | 90 ± 5 | 14 | 13 |
Lupanine | 0.986 | y = 69x | 0.03 | 0.11 | 88 ± 5 | 80 ± 8 | 96 ± 5 | 95±5 | 8 | 5 |
Lupinine | 0.983 | y = 97x | 0.17 | 0.61 | 87 ± 9 | 72 ± 8 | 93 ± 6 | 89 ± 6 | 19 | 14 |
Matrine | 0.992 | y = 451x | 2.11 | 4.22 | 90 ± 6 | 87 ± 8 | 93 ± 5 | 95 ± 7 | 12 | 7 |
Sparteine | 0.982 | y = 75x | 0.21 | 0.73 | 85 ± 10 | 77 ± 8 | 94 ± 8 | 92 ± 6 | 14 | 12 |