Determination of Ethoxyquin Residue in Fruits by Liquid Chromatography with Inhibited Oxidation Reaction

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Determination of Ethoxyquin Residue in Fruits by Liquid Chromatography with Inhibited Oxidation Reaction

- Determination of Ethoxyquin Residue in Fruits by Liquid Chromatography with Inhibited Oxidation Reaction
- Vol. 33, Issue 3, Pages: 358-361(2014)
- 作者机构：
  
  1. 浙江省检验检疫科学技术研究院
  2. 萧山出入境检验检疫局
- 作者简介：
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Determination of Ethoxyquin Residue in Fruits by Liquid Chromatography with Inhibited Oxidation Reaction. [J]. 33(3):358-361(2014)
DOI：

Determination of Ethoxyquin Residue in Fruits by Liquid Chromatography with Inhibited Oxidation Reaction. [J]. 33(3):358-361(2014) DOI：

摘要

建立了氧化抑制-液相色谱法准确测定苹果、梨中乙氧基喹啉残留量的方法。通过另一抗氧化剂的引入，有效抑制了乙氧基喹啉的氧化反应。优化了抗氧化剂的种类及用量，在样品制备时加入适量维生素C，以正己烷作为提取溶液，氮吹至近干，乙腈定容后，经C18色谱柱分离，以乙腈和水作为流动相梯度洗脱，液相色谱/荧光法测定，外标法定量。该法对苹果、梨中乙氧基喹啉的定量下限均为0.05 mg/kg，在样品中分别添加0.05、1.0、3.0、6.0 mg/kg浓度水平的乙氧基喹啉，回收率为79.4%~108%，相对标准偏差为3.8%~9.3%。该法通过有效抑制乙氧基喹啉的氧化，能准确用于苹果、梨中乙氧基喹啉的测定。

Abstract

A method regarding determination of ethoxyquin residue in fruits was presented by liquid chromatography with inhibited oxidation reactionAnother antioxidant was added in order to inhibit the oxidation reaction of ethoxyquin.In this experiment，the samples were added with vitamin C,homogenized,then extracted with hexane,concentrated to dryness and redissolved in acetonitrile.The target compound was separated on a C18 column using acetonitrile-water as mobile phase,and detected by HPLC.The quantitation limits for ethoxyquin in apple and pear were both 0.05 mg/kg.The spiked recoveries were in the range of 79.4%-108% with relative standard deviations of 3.8%-9.3%.The developed method was suitable for the determination of ethoxyquin in apple and pear samples.

关键词

水果乙氧基喹啉氧化抑制维生素C

Keywords

fruitethoxyquininhibited oxidationvitamin C

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Related Institution

Wens Institute， Wens Foodstuff Groups Co. Ltd.

Guangdong Provincial Key Laboratory of Food Quality and Safety，College of Food Science，South China Agricultural University

Guangzhou Inspection and Testing Certification Group Co.，Ltd.，National Quality Testing Center for Processed Food

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