高效液相色谱-三重四极杆质谱法测定面粉中7种荧光增白剂
发布时间:2018-11-07 18:36
【摘要】:建立了高效液相色谱-三重四极杆质谱(HPLC-MS/MS)测定面粉中7种荧光增白剂(FWAs)的分析方法。在样品中加入30 mL乙酸乙酯,超声提取10 min,离心后在40℃下氮吹浓缩,用乙腈定容后,上机检测。选用Phenomenex Kinetex C18色谱柱(100 mm×2.1 mm,2.6μm)分离,以0.1%(v/v)甲酸-乙腈和水为流动相进行梯度洗脱,采用电喷雾离子(ESI)源,在正离子、多反应监测(MRM)模式下进行扫描,外标法定量。7种荧光增白剂在各自范围内线性关系良好,相关系数均大于0.99,检出限(S/N=3)为0.50~2.65μg/kg,定量限(S/N=10)为1.60~8.80μg/kg;在3个添加水平下的平均加标回收率为64.8%~117.5%,相对标准偏差(n=6)为0.9%~14.4%。该方法操作简单、回收率高、精密度好,适于面粉中7种荧光增白剂的测定。
[Abstract]:A method for the determination of seven fluorescent brighteners (FWAs) in flour by high performance liquid chromatography-quadrupole mass spectrometry (HPLC-MS/MS) was established. Adding 30 mL ethyl acetate to the sample, ultrasonic extraction was centrifuged for 10 min, then concentrated by nitrogen blowing at 40 鈩,
本文编号:2317239
[Abstract]:A method for the determination of seven fluorescent brighteners (FWAs) in flour by high performance liquid chromatography-quadrupole mass spectrometry (HPLC-MS/MS) was established. Adding 30 mL ethyl acetate to the sample, ultrasonic extraction was centrifuged for 10 min, then concentrated by nitrogen blowing at 40 鈩,
本文编号:2317239
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