WANG Meng-ru,YIN Yao,NING Xiao-pan,et al.Determination of Ethoxyquinoline and Ethoxyquinoline Dimer in Aquatic Products by High Performance Liquid Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2023,42(03):344-350.
WANG Meng-ru,YIN Yao,NING Xiao-pan,et al.Determination of Ethoxyquinoline and Ethoxyquinoline Dimer in Aquatic Products by High Performance Liquid Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2023,42(03):344-350. DOI: 10.19969/j.fxcsxb.22103101.
Determination of Ethoxyquinoline and Ethoxyquinoline Dimer in Aquatic Products by High Performance Liquid Chromatography-Tandem Mass Spectrometry
建立了检测鱼、虾、泥鳅和螃蟹等水产品中乙氧基喹啉和乙氧基喹啉二聚体残留的高效液相色谱-串联质谱(HPLC-MS/MS)方法。在样品制备时加入适量维生素C,以乙腈作为提取溶剂,正己烷进行液液萃取。上清液经Oasis PRiME HLB固相萃取柱净化后旋蒸至近干,乙腈定容后采用Agela Phenomenex Kinetex C,18,色谱柱(100 mm × 4.6 mm × 2.6 μm)分离,在电喷雾电离源正离子模式下采用选择反应监测(SRM)模式进行检测,外标法定量。乙氧基喹啉和乙氧基喹啉二聚体在1 ~ 100 μg/L质量浓度范围内线性关系良好,相关系数(,r,2,)均大于0.994,检出限(LOD)均为0.5 μg/kg,定量下限(LOQ)均为1.5 μg/kg。两种目标物质在1.5、5、10、100 μg/kg 4个加标浓度下的平均回收率为75.8% ~ 103%,相对标准偏差(RSD)为0.58% ~ 9.6%。该方法灵敏度高,准确度和精密度好,适用于鱼、虾、泥鳅和螃蟹等水产品中乙氧基喹啉及乙氧基喹啉二聚体的检测。
Abstract
An analytical method was developed for the simultaneous determination of ethoxyquinoline and ethoxyquinoline dimer residues in aquatic products such as fishes,shrimps,loaches and crabs by high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS).An appropriate amount of vitamin C was added in the sample preparation.Acetonitrile was used as the extraction solvent,and hexane was used for liquid-liquid extraction.The supernatant was cleaned up on an Oasis PRiME HLB solid-phase extraction column and spun to near dryness,acetonitrile was used to fix the volume.Then the sample was separated on an Agela Phenomenex Kinetex C,18, column(100 mm ×4.6 mm × 2.6 μm),and subsequently detected with electrospray ionization source in positive ionization mode under selected reaction monitoring(SRM) mode,and quantified by external standard method. There were good linear relationships for both ethoxyquinoline and ethoxyquinoline dimer in concentration range of 1-100 μg/L,with their correlation coefficients(,r,2,) greater than 0.994. The limits of detection(LODs) and limits of quantitation(LOQs) of the method were 0.5 μg/kg and 1.5 μg/kg,respectively. The average recoveries for two target substances at four spiked levels of 1.5,5,10 and 100 μg/kg ranged from 75.8% to 103%,with relative standard deviations(RSDs) of 0.58%-9.6%. The developed method is sensitive,accurate and precise,and it could be applied to the determination of ethoxyquinoline and ethoxyquinoline dimer in aquatic products such as fishes,shrimps,loaches and crabs.
关键词
高效液相色谱-串联质谱水产品乙氧基喹啉乙氧基喹啉二聚体固相萃取
Keywords
high performance liquid chromatography-tandem mass spectrometryaquatic productsethoxyquinolineethoxyquinoline dimersolid-phase extraction
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