PMID- 32290944 OWN - NLM STAT- MEDLINE DCOM- 20200826 LR - 20200826 IS - 1000-8020 (Print) IS - 1000-8020 (Linking) VI - 49 IP - 2 DP - 2020 Mar TI - [Determination of thiram, propineb and metiram in mushroom by gas chromatography-mass spectrometry]. PG - 267-271 LID - 10.19813/j.cnki.weishengyanjiu.2020.02.017 [doi] AB - OBJECTIVE: To establish a method for determination of thiram, propineb and metiram in mushroom samples by gas chromatography-mass spectrometry(GC-MS). METHODS: Insoluble heavy metal salts were converted into water-soluble sodium salts by alkaline buffer with strong chelating agents. Dithiocarbamates can be converted into different methyl ester compounds with ion pair methylation. The GC separation was performed on a DB-5 MS capillary column(30 mx0. 25 mm, 0. 25 mum). The pesticides were detected by GC-MS with selective ion monitoring(SIM) and quantified by external standard of working curve method. Methodsological verification was carried out based on optimized sample pretreatment and GC-MS condition. RESULTS: The concentrations of dithiocarbamates exhibited a good linear relationship with GC-MS within a certain range. The limits of detection of thiram, propineb and metiram were 0. 01, 0. 05 and 0. 05 mg/kg, respectively. Furthermore, the average recoveries were from 76. 98% to 93. 52%, and the maximum relative standard deviation was 11. 54%(n=6). CONCLUSION: This method is simple, sensitive, accurate and reliable. All the indices meet the requirements of pesticide residue detection. FAU - Zhang, Jing AU - Zhang J AD - Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China. FAU - Tan, Ying AU - Tan Y AD - Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China. FAU - Feng, Liang AU - Feng L AD - Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China. FAU - Ni, Zhunan AU - Ni Z AD - Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China. FAU - Wang, Junlin AU - Wang J AD - Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China. FAU - Cai, Zengxuan AU - Cai Z AD - Zhejiang Center for Disease Control and Prevention, Hangzhou 310051, China. LA - chi PT - Journal Article PL - China TA - Wei Sheng Yan Jiu JT - Wei sheng yan jiu = Journal of hygiene research JID - 9426367 RN - 0 (Pesticide Residues) RN - 003VPM353K (propineb) RN - 0D771IS0FH (Thiram) RN - 9006-42-2 (polymarcine) RN - 99Z2744345 (Ditiocarb) RN - X1FSB1OZPT (Zineb) SB - IM MH - *Agaricales MH - Ditiocarb MH - Gas Chromatography-Mass Spectrometry MH - Pesticide Residues/*analysis MH - Thiram MH - Zineb/analogs & derivatives OTO - NOTNLM OT - gas chromatography-mass spectrometry OT - metiram OT - mushroom OT - propineb OT - thiram EDAT- 2020/04/16 06:00 MHDA- 2020/08/28 06:00 CRDT- 2020/04/16 06:00 PHST- 2020/04/16 06:00 [entrez] PHST- 2020/04/16 06:00 [pubmed] PHST- 2020/08/28 06:00 [medline] AID - 10.19813/j.cnki.weishengyanjiu.2020.02.017 [doi] PST - ppublish SO - Wei Sheng Yan Jiu. 2020 Mar;49(2):267-271. doi: 10.19813/j.cnki.weishengyanjiu.2020.02.017.