PMID- 36575033 OWN - NLM STAT- MEDLINE DCOM- 20221229 LR - 20230103 IS - 0015-6426 (Print) IS - 0015-6426 (Linking) VI - 63 IP - 6 DP - 2022 TI - [Determination of Chlorothalonil Metabolite I in Livestock Products by LC-MS/MS]. PG - 195-201 LID - 10.3358/shokueishi.63.195 [doi] AB - An analytical method based on LC-MS/MS was developed for the determination of chlorothalonil metabolite I in livestock products. Chlorothalonil metabolite I in livestock products was extracted with acetone. The crude extracts were defatted by acetonitrile and n-hexane partitioning. Cleanup was carried out using a combination of ethylene diamine-N-propyl silylation silica gel (PSA) and silica gel (SI) mini columns with acidic condition. The sample solution was subjected to LC-MS/MS using an external solvent calibration curve. The average recovery (n=5) of chlorothalonil metabolite I from five types of livestock products (cattle muscle, cattle fat, cattle liver, milk and egg) spike at the maximum residue limits (MRLs) or at a uniform limit of 0.01 mg/kg was 97.1-102.9%, with a relative standard deviation of 1.4-6.8%. The limit of quantitation of the developed method was calculated to be 0.01 mg/kg. FAU - Kobayashi, Maki AU - Kobayashi M AD - Tokyo Metropolitan Institute of Public Health. FAU - Sakai, Naoko AU - Sakai N AD - Tokyo Metropolitan Institute of Public Health. FAU - Ohmachi, Yuki AU - Ohmachi Y AD - Tokyo Metropolitan Institute of Public Health. FAU - Morita, Yuka AU - Morita Y AD - Tokyo Metropolitan Institute of Public Health. FAU - Nemoto, Satoru AU - Nemoto S FAU - Ohtsuka, Kenji AU - Ohtsuka K AD - Tokyo Metropolitan Institute of Public Health. LA - jpn PT - English Abstract PT - Journal Article PL - Japan TA - Shokuhin Eiseigaku Zasshi JT - Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan JID - 0142214 RN - J718M71A7A (tetrachloroisophthalonitrile) RN - 60650-90-0 (Silica Gel) SB - IM MH - Animals MH - Cattle MH - *Livestock MH - *Tandem Mass Spectrometry MH - Chromatography, Liquid MH - Silica Gel OTO - NOTNLM OT - 2,5,6-Trichloro-4-hydroxyisophthalonitrile OT - LC-MS/MS OT - chlorothalonil metabolite I OT - livestock products EDAT- 2022/12/28 06:00 MHDA- 2022/12/30 06:00 CRDT- 2022/12/27 20:53 PHST- 2022/12/27 20:53 [entrez] PHST- 2022/12/28 06:00 [pubmed] PHST- 2022/12/30 06:00 [medline] AID - 10.3358/shokueishi.63.195 [doi] PST - ppublish SO - Shokuhin Eiseigaku Zasshi. 2022;63(6):195-201. doi: 10.3358/shokueishi.63.195.