食品科学

• 安全检测 • 上一篇    下一篇

高效液相色谱-荧光检测法测定食品接触材料中的水溶性及脂溶性荧光增白剂

刘 杰,郑俊英,彭青枝,张 莉,文 红,周陶鸿,朱晓玲   

  1. 湖北省食品质量安全监督检验研究院,湖北 武汉 430074
  • 出版日期:2015-12-25 发布日期:2015-12-24
  • 通讯作者: 朱晓玲

Determination of Lipid-Soluble and Water-Soluble Fluorescent Whitening Agents in Food Contact Materials by High Performance Liquid Chromatography with Fluorescence Detector

LIU Jie, ZHENG Junying, PENG Qingzhi, ZHANG Li, WEN Hong, ZHOU Taohong, ZHU Xiaoling   

  1. Hubei Provincial Institute for Food Supervision and Test, Wuhan 430074, China
  • Online:2015-12-25 Published:2015-12-24
  • Contact: ZHU Xiaoling

摘要:

建立食品接触材料中6 种脂溶性荧光增白剂(FWA367、FWA393、FWA368、FWA140、FWA135、FWA184)和2 种水溶性荧光增白剂(FWA49、FWA220)的高效液相色谱-荧光检测分析方法。样品经简单的超声提取后采用C18反相色谱柱(250 mm×4.6 mm,5 μm)进行分离,乙腈和水为流动相,梯度洗脱,并采用荧光检测器进行检测。在最佳实验条件下,FWA367、FWA393、FWA368、FWA140、FWA135和FWA184的线性范围为1~200 μg/L,FWA49和FWA220的线性范围分别为10~2 000、50~2 000 μg/L,8 种目标化合物在相应的线性范围内其线性相关系数均大于0.998 2,方法的回收率为87.8%~99.7%,相对标准偏差为2.1%~6.4%(n=6)。该方法简便、准确,可用于食品接触材料中6 种脂溶性荧光增白剂和2 种水溶性荧光增白剂的测定。

关键词: 高效液相色谱, 荧光检测, 荧光增白剂, 食品接触材料

Abstract:

A method was developed for simultaneous determination of six lipid-soluble fluorescent whitening agents
(FWA367, FWA393, FWA368, FWA140, FWA135, and FWA184) and two water-soluble fluorescent whitening agents
(FWA49 and FWA220) by high performance liquid chromatography with fluorescence detector (HPLC-FLD). The
samples were extracted by a simple ultrasonic extraction procedure and then separated on a reversed-phase C18 column
with acetonitrile and water as the mobile phases in gradient elution mode. The target compounds were detected by
fluorescence detector. Under optimized test conditions, the linear ranges of the method for FWA367, FWA393, FWA368,
FWA140, FWA135 and FWA184 were 1–200 μg/L, and those for FWA49 and FWA220 were 10–2 000 μg/L and 50–
2 000 μg/L, respectively. The correlation coefficients for all 8 target compounds were higher than 0.998 2. The spiked
recoveries were between 87.8% and 99.7% with relative standard deviations (RSDs, n = 6) of 2.1%–6.4%. This method is
simple and practical, and can be used for simultaneous determination of six lipid-soluble fluorescent whitening agents and
two water-soluble fluorescent whitening agents in food contact materials.

Key words: high performance liquid chromatography (HPLC), fluorescence detection (FLD), fluorescent whitening agents (FWAs), food contact materials

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