PMID- 33717613 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210316 IS - 2214-0883 (Electronic) IS - 2095-1779 (Print) IS - 2214-0883 (Linking) VI - 11 IP - 1 DP - 2021 Feb TI - Development of an analytical method for multi-residue quantification of 18 anthelmintics in various animal-based food products using liquid chromatography-tandem mass spectrometry. PG - 68-76 LID - 10.1016/j.jpha.2020.03.008 [doi] AB - In this study, we developed a simple screening procedure for the determination of 18 anthelmintics (including benzimidazoles, macrocyclic lactones, salicylanilides, substituted phenols, tetrahydropyrimidines, and imidazothiazoles) in five animal-derived food matrices (chicken muscle, pork, beef, milk, and egg) using liquid chromatography-tandem mass spectrometry. Analytes were extracted using acetonitrile/1% acetic acid (milk and egg) and acetonitrile/1% acetic acid with 0.5 mL of distilled water (chicken muscle, pork, and beef), and purified using saturated n-hexane/acetonitrile. A reversed-phase analytical column and a mobile phase consisting of (A) 10 mM ammonium formate in distilled water and (B) methanol were used to achieve optimal chromatographic separation. Matrix-matched standard calibration curves (R (2) >/=0.9752) were obtained for concentration equivalent to x1/2, x1, x2, x3, x4, and x5 fold the maximum residue limit (MRL) stipulated by the Korean Ministry of Food and Drug Safety. Recoveries of 61.2-118.4%, with relative standard deviations (RSDs) of