食品科学 ›› 2009, Vol. 30 ›› Issue (24): 366-368.doi: 10.7506/spkx1002-6630-200924082

• 分析检测 • 上一篇    下一篇

面食品中溴酸盐的气相色谱法测定

廖燕芝,杨代明,张继红   

  1. 湖南省食品质量监督检测所
  • 收稿日期:2009-01-08 出版日期:2009-12-15 发布日期:2010-12-29
  • 通讯作者: 廖燕芝 E-mail:xtulyz@hotmail.com

Determination of Bromate in Flour Products by GC

LIAO Yan-zhi,YANG Dai-ming,ZHANG Ji-hong   

  1. Institute of Food Quality Supervision and Test of Hunan Province, Changsha 410002, China
  • Received:2009-01-08 Online:2009-12-15 Published:2010-12-29
  • Contact: LIAO Yan-zhi E-mail:xtulyz@hotmail.com

摘要:

采用碱性炭化灰化法处理样品,把面食品中所有形态存在的溴转化为溴离子Br(Ⅰ)形态,把溴作为被检成分,采用衍生化气相色谱法,电子捕获检测器(ECD)测定面食品中溴化合物的总量,再定量换算成为添加的溴酸盐的含量。溴酸盐含量在0.72~11.52μg/ml 时线性关系良好。方法最低检出限为1.0mg/kg,回收率为80%~103%,RSD 为4.0%~9.0%。该方法基本能够真实反映溴酸盐的添加量,可满足快速准确检测的要求,可操作性强,有较高的准确度和稳定性,为监测面食品中添加的溴酸盐提供一种有效可行的检测方法。

关键词: 溴酸盐, 气相色谱法, 衍生化, 面食品

Abstract:

A sensitive method was developed for the determination of bromate in flour products by gas chromatography. Bromate was extracted with water from bread, noodle and flour samples in a ultrasonic bath for 30 min. After centrifugation, thesupernatant was further extracted by hexane and the upper organic layers were collected and filtered over 5 g of anhydrous Na2SO4. Recoveries of bromate from samples were in the range 80%-103%, and the limit of detection was 1.0 mg/kg. The results of the analysis can truly predict the addition of bromated in bread products and was capable of meeting the requirements for rapid and accurate detection.

Key words: potassium bromate, gas chromatography(GC), derivatization, bread

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