食品科学 ›› 2009, Vol. 30 ›› Issue (8): 247-250.doi: 10.7506/spkx1002-6630-200908056

• 分析检测 • 上一篇    下一篇

乙二胺四乙酸二钠-盐酸副玫瑰苯胺检测干果中二氧化硫的方法研究

郭振忠1,2,胡云峰1,李文生2,冯晓元2,3,*,王宝刚2,王纪华3   

  1. 1.天津科技大学食品工程与生物技术学院 2.北京市农林科学院林业果树研究所 3.北京农产品质量检测与农田环境监测技术研究中心
  • 收稿日期:2008-07-02 修回日期:2008-12-29 出版日期:2009-04-15 发布日期:2010-12-29
  • 通讯作者: 冯晓元 E-mail:xyfeng@yahoo.cn
  • 基金资助:

    北京市科委项目(Z07090500550702)

Determination of Sulfur Dioxide in Nut Fruits by EDTA-2Na Solution Sampling-Pararosaniline Hydrochloride Spectrophotometric Method

GUO Zhen-zhong1,2 HU Yun-feng1 LI Wen-sheng2 FENG Xiao-yuan2,3,* WANG Bao-gang2 WANG Ji-hua3   

  1. (1. College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
    2. Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China
    3. Beijing Research Center for Agrifood Testing and Farmland Monitoring, Beijing 100097, China)
  • Received:2008-07-02 Revised:2008-12-29 Online:2009-04-15 Published:2010-12-29
  • Contact: FENG Xiao-yuan2,3,* E-mail:xyfeng@yahoo.cn

摘要:

本研究对盐酸副玫瑰苯胺法测定食品中SO2进行改进,以EDTA-2Na代替剧毒试剂四氯汞钠,建立了超声波浸提、无汞盐吸收液检测干果SO2残留的方法,二氧化硫含量在0~10.0μg范围内与吸光度呈良好的线性关系(R2=0.9995),方法的检出限为0.8mg/kg。测定样品的相对标准偏差在3.29%~7.42%之间,回收率在89.17%~104.72%之间。该方法操作简便、重现性好、线性范围宽、减小了对环境的污染,可用于干果中亚硫酸盐的测定。

关键词: 亚硫酸盐, 二氧化硫, 盐酸副玫瑰苯胺, 乙二胺四乙酸二钠, 干果

Abstract:

A rapid determination method of sulfur dioxide (SO2) residues in nut fruits by an improved pararosaniline hydrochloride colorimetry combined with ultrasonic-assisted mercury-free reagent extraction was developed. In order to extract SO2 residues effectively from samples, accelerative ultrasonic extraction was performed in EDTA-2Na solution instead of Na2HgCl4 which has been widely used. This method has a good linearity(R2 = 0.9995)for the concentration of sulfur dioxide ranging from 0 to 10μg, and its detection limit is 0.8 mg/kg. The average spike recoveries of SO2 in different nut fruit samples are between 89.17% and 104.72% with the RSD of 3.29% to 7.42%. This method has good repeatability and causes less pollution. Therefore, it is suitable for the determination of sulfite in nut fruits.

Key words: sulfite, sulfur dioxide, pararosaniline hydrochloride, ethylenediamine tetraacetic acid disodium, nut fruits

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