摘要
建立了QuEChERS结合高效液相色谱-串联质谱仪(HPLC-MS/MS)同时测定粮谷中16种真菌毒素残留量的方法,样品经乙腈-水-乙酸(84∶15∶1,v/v)溶液超声提取,提取液采用C18、MgSO4净化,净化液过0.22μm微孔滤膜,用HPLC-MS/MS分析检测。Acquity UPLC BEH C18柱为分析柱,甲醇/乙腈(4+6)-0.1%甲酸水溶液为流动相进行梯度洗脱,采用电喷雾正负离子(ESI+、ESI-)模式同时电离,多反应监测(MRM)模式检测,外标法定量。结果表明,16种真菌在相应的浓度范围内线性关系良好(相关系数r2>0.995),方法定量限为0.3~3.5μg/kg,在低、中、高3个不同浓度的添加水平下,平均回收率为90.6%~106.5%,相对标准偏差≤8.8%(n=6),满足日常检测要求。该方法前处理简单,测定快速、准确,灵敏度高,适用于粮谷中16种真菌毒素残留的定性和定量分析。
A method of HPLC-MS/MS coupled with QuEChERS-based extraction had been developed for simultaneous determination of 16 mycotoxins in grains as follows:the samples were extracted by ultrasonic with acetonitrile-water-acetic acid(84∶15∶1,v/v)solution,and purified by C18 and MgSO4 sorbents,then filtered through 0.22μm microporous membrane,and finally detected by HPLCMS/MS.The LC separation was performed on Shimadzu LC-20ADXR system with a BEH C18 column with methanol/acetonitrile(4∶6)and 0.1%formic acid aqueous solution as the mobile phase for gradient elution.After LC separation,MS/MS was adopted for multiple reaction monitoring(MRM)in positive and negative mode.The correlation coefficients of linear calibration curves were above 0.995 in the corresponding concentration ranges.The limits of detection(LODs)were between 0.3μg/kg and 3.5μg/kg.The average recoveries of the 16 mycotoxins ranged from 90.6%to 106.5%,and the relative standard deviations(RSD)were lower than 8.8%in spiked sample at three levels.The results indicated that this method was fast,easy,sensitive,and suitable for the qualitative and quantitative analysis of the 16 mycotoxins in grains.
作者
王丽娟
李超
陈嘉杰
吴奕萱
杨春艳
安红梅
柯润辉
WANG Lijuan;LI Chao;CHEN Jiajie;WU Yixuan;YANG Chunyan;AN Hongmei;KE Runhui(National Research Institute of Food&Fermentation Industries Co.Ltd.,Beijing 100015;China Institute of Household Electrical Appliances,Beijing 100037,China)
出处
《酿酒科技》
2020年第3期86-92,共7页
Liquor-Making Science & Technology