PMID- 11393726 OWN - NLM STAT- MEDLINE DCOM- 20011004 LR - 20190901 IS - 1387-2273 (Print) IS - 1387-2273 (Linking) VI - 755 IP - 1-2 DP - 2001 May 5 TI - Multi-residue analysis of avermectins in swine liver by immunoaffinity extraction and liquid chromatography-mass spectrometry. PG - 361-6 AB - A multi-residue LC-MS method was developed to determine avermectin residues in swine liver. Abamectin and ivermectin (22,23-dihydroabamectin) were extracted, and cleaned up by immunoaffinty columns with immobilized anti-avermectin polyclonal antibodies. The cleaned samples were separated by high-performance liquid chromatography (HPLC) with a C8 column and determined by negative-ion atmospheric pressure chemical ionization (APCI) mass spectrometry (MS) using selective ion monitoring (SIM) of [M-H]-. Recoveries of abamectin and ivermectin from fortified samples at 5-100 microg kg(-1) levels ranged from 74 to 94% and from 65 to 87%, respectively. The limits of detection were 5 microg of abamectin or ivermectin in 1 kg sample. FAU - Wu, Z AU - Wu Z AD - College of Chemistry and Molecular Engineering, Peking University, Beijing, China. FAU - Li, J AU - Li J FAU - Zhu, L AU - Zhu L FAU - Luo, H AU - Luo H FAU - Xu, X AU - Xu X LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - J Chromatogr B Biomed Sci Appl JT - Journal of chromatography. B, Biomedical sciences and applications JID - 9714109 RN - 0 (Anthelmintics) RN - 0 (Antiprotozoal Agents) RN - 0 (Immunosorbents) RN - 70288-86-7 (Ivermectin) RN - 73989-17-0 (avermectin) SB - IM MH - Animals MH - Anthelmintics/*analysis/chemistry MH - Antiprotozoal Agents/*analysis/chemistry MH - Chromatography, Affinity MH - Chromatography, Liquid/methods MH - Immunosorbents MH - Ivermectin/analogs & derivatives/*analysis/chemistry MH - Liver/*chemistry/metabolism MH - Mass Spectrometry MH - Molecular Structure MH - Sensitivity and Specificity MH - Swine EDAT- 2001/06/08 10:00 MHDA- 2001/10/05 10:01 CRDT- 2001/06/08 10:00 PHST- 2001/06/08 10:00 [pubmed] PHST- 2001/10/05 10:01 [medline] PHST- 2001/06/08 10:00 [entrez] AID - 10.1016/s0378-4347(01)00077-9 [doi] PST - ppublish SO - J Chromatogr B Biomed Sci Appl. 2001 May 5;755(1-2):361-6. doi: 10.1016/s0378-4347(01)00077-9.