南宁海关技术中心,广西 南宁 530201
汪文龙,副主任技师,研究方向:食品安全检测与研究,E-mail:1224509828@qq.com
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秦富,汪文龙,司露露等.固相萃取/液相色谱-串联质谱法测定水果蔬菜中双胍辛胺的残留量[J].分析测试学报,2022,41(05):768-773.
QIN Fu,WANG Wen-long,SI Lu-lu,et al.Determination of Iminoctadine Residues in Fruits and Vegetables by Solid Phase Extraction and Liquid Chromatography- Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2022,41(05):768-773.
秦富,汪文龙,司露露等.固相萃取/液相色谱-串联质谱法测定水果蔬菜中双胍辛胺的残留量[J].分析测试学报,2022,41(05):768-773. DOI: 10.19969/j.fxcsxb.21071001.
QIN Fu,WANG Wen-long,SI Lu-lu,et al.Determination of Iminoctadine Residues in Fruits and Vegetables by Solid Phase Extraction and Liquid Chromatography- Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2022,41(05):768-773. DOI: 10.19969/j.fxcsxb.21071001.
建立了测定沃柑、菠萝蜜、苹果、葡萄、生菜、黄瓜、西红柿、芦笋等水果蔬菜中双胍辛胺残留量的固相萃取/液相色谱-串联质谱方法。试样用0.2%乙酸水提取,二氯甲烷萃取杂质,提取液经WCX固相萃取柱净化,10%甲酸乙腈洗脱,氮吹至近干后以0.2%甲酸水复溶。采用甲醇和0.2%甲酸水为流动相,经Eclipse Plus C,18,(2.1 mm × 100 mm,1.8 μm)分离,在电喷雾离子源正离子模式下采用双胍辛胺的双电荷加合母离子,m,/,z ,178.8及其子离子,m,/,z ,100.0和187.0进行多反应监测(MRM)扫描,基质加标曲线进行定量。结果表明,双胍辛胺在0.005~0.160 mg/kg范围内线性关系良好,相关系数,r ,≥ 0.995;0.010、0.020、0.050 mg/kg加标水平下的平均回收率为88.5%~109%,相对标准偏差(RSD,,n ,= 6)为2.1%~8.8%;方法检出限为0.005 mg/kg,定量下限为0.010 mg/kg。该方法快速、准确、灵敏,适用于水果蔬菜中双胍辛胺残留量的测定。
A solid phase extraction and liquid chromatography-tandem mass spectrometry was developed for the determination of iminoctadine residues in fruits and vegetables including citrus,jackfruit,apple,grape,lettuce,cucumber,tomato and asparagu.Samples were extracted with 0.2% acetic acid,and preliminarily purified with dichloromethane. The extract solution was purified using a WCX solid phase extraction column,and the target compound was eluted with 10% formic acid acetonitrile.The eluent was blown to near dryness with nitrogen,and then redissolved with 0.2% formic water.The compound was separated on a C,18, column with methanol and 0.2% formic acid water as mobile phases.The double charges additive ion ,m/z ,178.8 and its daughter ions ,m/z ,100.0 and 187.0 from iminoctadine were selected for the multi reaction monitoring(MRM) scanning under the positive ion mode of electrospray ion source(ESI,+,).The iminoctadine in the samples was quantified by the calibration curve of matrix addition standard.The correlation coefficients(,r,) were not less than 0.995,which indicated that the linear dependence of iminoctadine was good in the range of 0.005-0.160 mg/kg.The limits of detection(LOD) and quantitation(LOQ) for iminoctadine were 0.005 mg/kg and 0.010 mg/kg,respectively.The average recoveries at spiked levels of 0.010,0.020 and 0.050 mg/kg ranged from 88.5% to 109%,with the relative standard deviations(RSDs,,n ,= 6) of 2.1%-8.8%.With the advantages of rapidness,accuracy and sensitivity,this method is suitable for the determination of iminoctadine in fruits and vegetables.
双胍辛胺双胍三辛烷基苯磺酸盐沃柑固相萃取液相色谱-串联质谱
iminoctadineiminoctadine tris(albesilate)citrussolid phase extractionliquid chromatography-tandem mass spectrometry
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