分散固相萃取-UPLC-MS/MS同时测定枸杞籽油中14种真菌毒素
Sichuan Food and Fermentation(2019)
Abstract
建立了枸杞籽油中14种真菌毒素的超高效液相色谱-串联质谱(UPLC-MS/MS)的检测方法,样品以QuEChERS(Quick,Easy,Cheap,Effective,Rugged,Safe)法为前处理技术,优化净化吸附剂组合和用量,改进净化方式,以甲醇-2mmol/L甲酸铵为流动相梯度洗脱,经BEH C18色谱柱(2.1mm×100mm,1.8μm)分离,在电喷雾电离(ESI)正离子模式下采用多反应监测(MRM)进行测定,基质外标法定量.14种真菌毒素在不同浓度下其峰强度和质量浓度呈良好的线性关系(R>0.9992),样品添加回收试验的平均回收率介于60-120%之间,相对标准偏差为4.16-25.2%之间(n=6).方法检出限为0.03-1.5μg/kg.该方法简单准确,适用于枸杞籽油中14种真菌毒素的同时检测.
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