A detection method using UHPLC-MS/MS was established for the determination of 53 prohibited veterinary drug residues in goat horns, including 16 tranquilizers, 14 β-agonists, chloramphenicol, 4 fluoroquinolones, 7 nitroimidazoles, 3 quinoxalines, and 8 other compounds. Samples were extracted using salting-out assisted liquid-liquid extraction (SALLE). A Zorbax Eclipse Plus C18 column (1.8 μm, 3.0 mm × 150 mm, Agilent) was used with 0.1% formic acid solution-acetonitrile as the mobile phase for gradient elution. Detection was performed in positive and negative electrospray ionization modes using multiple reaction monitoring (MRM). All 53 analytes showed good linearity within their respective concentration ranges, with correlation coefficients above 0.99. The average recoveries at three spiked levels ranged from 70.4% to 118.7%, with relative standard deviations (RSDs) ranging from 0.69% to 12.07%. The limits of detection (LODs) ranged from 0.1 to 50 μg·kg-1, and the limits of quantitation (LOQs) ranged from 0.2 to 100 μg·kg-1. This method has been applied to the determination of real samples.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |