PMID- 34213170 OWN - NLM STAT- MEDLINE DCOM- 20210716 LR - 20210716 IS - 1872-2059 (Electronic) IS - 1000-8713 (Linking) VI - 38 IP - 2 DP - 2020 Feb 8 TI - [Determination of four protease inhibitors in chicken by ultra performance liquid chromatography-tandem mass spectrometry]. PG - 212-217 LID - 10.3724/SP.J.1123.2019.04047 [doi] AB - A method was developed for the determination of four protease inhibitors (saquinavir, ritonavir, nelfinavir and indinavir) in chicken using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The samples were extracted by shaking with 30% (v/v) acetonitrile aqueous solution (containing 1% (v/v) trichloroacetic acid), and purified by using mixed-mode cationic-exchanger (MCX) cartridges. The samples were separated on a Luna((R)) C8 column (150 mmx2 mm, 3 mum) using 0.2% (v/v) formic acid aqueous solution (containing 5 mmol/L ammonium acetate) and acetonitrile as the mobile phases with gradient elution. The determination was carried out by using an electrospray ion source in the positive and multiple-reaction monitoring (MRM) modes. The calibration curves showed good linearities in the range of 0.1-20.0 mug/L, and the correlation coefficients (r(2)) were greater than 0.99. The limits of quantification (LOQs, S/N=10) of the four protease inhibitors varied from 0.20 mug/kg to 0.90 mug/kg. At the spiked levels of 1.0, 2.0, and 10.0 mug/kg, the average recoveries of the four protease inhibitors were ranging from 69.0% to 106.0%. The intra-day and inter-day relative standard deviations (RSDs) were 2.2%-13.8% (n=6) and 3.6%-14.6% (n=3), respectively. The method is simple, efficient, sensitive and accurate, and it can be used to detect residues of saquinavir, ritonavir, nelfinavir and indinavir in chicken. FAU - Lu, Jiale AU - Lu J AD - Food Science College of Fujian Agriculture and Forestry University, Fuzhou 350002, China. FAU - Liu, Zhengcai AU - Liu Z AD - Technology center of Fuzhou Customs District, Fuzhou 350001, China. FAU - Yao, Minna AU - Yao M AD - Food Science College of Fujian Agriculture and Forestry University, Fuzhou 350002, China. FAU - Lin, Yuandi AU - Lin Y AD - Technology center of Fuzhou Customs District, Fuzhou 350001, China. LA - chi PT - Journal Article PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 0 (Protease Inhibitors) RN - 5W6YA9PKKH (Indinavir) RN - HO3OGH5D7I (Nelfinavir) RN - L3JE09KZ2F (Saquinavir) RN - O3J8G9O825 (Ritonavir) SB - IM MH - Animals MH - Chickens MH - Chromatography, High Pressure Liquid MH - *Food Analysis MH - Food Contamination/*analysis MH - Indinavir MH - Nelfinavir MH - Poultry Products/*analysis MH - Protease Inhibitors/*analysis MH - Ritonavir MH - Saquinavir MH - Tandem Mass Spectrometry OTO - NOTNLM OT - chicken OT - indinavir OT - nelfinavir OT - ritonavir OT - saquinavir OT - solid phase extraction (SPE) OT - ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) EDAT- 2020/02/08 00:00 MHDA- 2021/07/17 06:00 CRDT- 2021/07/02 09:12 PHST- 2021/07/02 09:12 [entrez] PHST- 2020/02/08 00:00 [pubmed] PHST- 2021/07/17 06:00 [medline] AID - 10.3724/SP.J.1123.2019.04047 [doi] PST - ppublish SO - Se Pu. 2020 Feb 8;38(2):212-217. doi: 10.3724/SP.J.1123.2019.04047.