高效液相色谱法测定食用菌中10种荧光增白剂
Physical Testing and Chemical Analysis Part B:Chemical Analysis(2015)
Abstract
采用高效液相色谱法同时测定食用菌中10种双三嗪氨基二苯乙烯型荧光增白剂的含量.色谱分离中,以Athena C18-WP色谱柱(4.6 mm×200 mm,5μm)为固定相,用乙腈和0.02mol·L-1乙酸铵溶液以不同比例混合的溶液为流动相进行梯度洗脱,用荧光检测器测定,激发波长为350 nm,发射波长为430 nm.10种荧光增白剂的质量浓度均在2.0~100 μg·L-1范围内与其峰面积呈线性关系,方法的检出限(3S/N)在0.002~0.005mg·kg-1之间.以空白样品为基体进行加标回收试验,所得回收率在73.0%~121%之间,测定值的相对标准偏差(n=6)在0.90%~7.8%之间.
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