Determination of Eprinomectin in Bovine Urine and Feces Using HPLC with Fluorescence Detection |
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Authors: | Haiyang Jiang Shuangyang Ding Fei Xu Sijun Zhao Jihong He Jinfeng Liu Xiaolin Hou Jianzhong Shen |
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Institution: | (1) Department of Pharmacology and Toxicology, College of Veterinary Medicine, China Agriculture University, Beijing, 100094, People’s Republic of China;(2) National Reference Laboratories for Veterinary Drug Residue, Haidian District, Beijing, 100094, People’s Republic of China |
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Abstract: | Eprinomectin is a novel and potent antiparasitic animal health drug. An analytical procedure for the determination of EPR
in bovine urine and feces has been developed. The urine sample was centrifuged and alkalized with ammonia following solid
phase extraction. The fecal sample was extracted with acetonitrile, defatted with hexane, cleaned-up using C18 cartridge.
All samples were analyzed by high performance liquid chromatography with fluorescence detection after derivatization with
N-methylimidazole. The limits of detection are 0.5 ng mL−1 and 0.5 ng g−1, respectively. Fortified at 2, 10, 50, and 100 ng mL−1(ng g−1), inter-assay recoveries of EPR in cattle urine and feces were in the range of 87.9–91.5% and 78.6–86.3%, with coefficients
of variation of 5.4–10.2% and 1.4–7.2%, respectively. Intra-assay mean recoveries of the analytes were 82.2–86.5% and 79.6–87.3%,
with coefficients of variation of 7.8–11.5% and 6.3–7.8%, respectively. The method was used to study the excretion of eprinomectin
in bovine urine and feces after subcutaneous administration at a dose of 0.5 mg kg−1. |
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Keywords: | Column liquid chromatography Solid phase extraction Bovine urine and feces Eprinomectin |
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