【摘要】 目的:建立检测塑料食品包装材料双三嗪氨基二苯乙烯类荧光增白剂(DSD-FWAs)的高效液相色谱-荧光检测法。方法:样品经乙腈/水(40∶60,v/v)超声提取,Eclipse XDB-C18为分析柱,以乙腈/水为流动相,梯度洗脱,流速为1.0mL·min-1,荧光检测器检测。结果:5种荧光增白剂在0.5～20 mg·L-1范围内线性良好(r≥0.999 1)。在1.0和5.0 mg·L-1添加水平的回收率范围为81.5%～97.1%,相对标准偏差(RSD)为1.2%～6.1%。结论:该方法简单、准确度高、选择性高,可用于快速检测塑料食品包装材料中的5种荧光增白剂。更多还原

【Abstract】 Objective: To develop a method for the determination of fluorescent whitening agents in plastic food packaging materials by high performance liquid chromatography（HPLC） with fluorescence detector. Methods: Samples were ultrasonically extracted with acetonitrile/water（40∶ 60, v/v）. It was separated on a column of Eclipse XDB-C₁₈, Methanol-acetonitrile-water was used as the mobile phase with gradient elution. The flow rate of the mobile phase was 1.0 mL/min, and then detected by a fluorescence detector. Results: There was a good linearity in the concentration range of 0.5～ 20.0 mg·L^-1 for the five target compounds with correlation coefficients not less than 0.999 1. The average recoveries of the five compounds ranged from 81.5% to 97.1% at the spiked levels of 1.0, 5.0 mg·L-1 with relative standard deviations（RSD） of 1.2% ～ 6.1%. Conclusion: The method proposed in this plastic food packaging materials is simple, accurate and highly selective, and can be used for the rapid determination of the five FWAs in plastic food packaging materials.更多还原