食品科学 ›› 2013, Vol. 34 ›› Issue (6): 219-222.doi: 10.7506/spkx1002-6630-201306049

• 分析检测 • 上一篇    下一篇

酸性品红-B-R体系共振光散射法测定牛奶中的新霉素

高向阳1,2,徐雅莉2,张娜1,孔欣欣1   

  1. 1.郑州科技学院食品科学系,河南 郑州 450064;2.河南农业大学食品科学技术学院,河南 郑州 450002
  • 收稿日期:2012-01-24 修回日期:2013-02-01 出版日期:2013-03-25 发布日期:2013-03-01
  • 通讯作者: 高向阳 E-mail:ndgaoxy@163.com
  • 基金资助:
    河南省重点学科建设项目

Determination of Neomycin in Milk with Acidic Fuchsin-B-R System by Resonance Light Scattering Method

GAO Xiang-yang1,2,XU Ya-li2,ZHANG Na1,KONG Xin-xin1   

  1. 1. Department of Food Science, Zhengzhou Institute of Science and Technology, Zhengzhou 450064, China;2. College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2012-01-24 Revised:2013-02-01 Online:2013-03-25 Published:2013-03-01
  • Contact: GAO xiang-yang E-mail:ndgaoxy@163.com

摘要: 为建立一种快速测定牛奶中新霉素的新方法,以市售超高温灭菌纯牛奶为样品,基于样品中残留新霉素与酸性品红在pH5.50的B-R(Britton-Robinson)缓冲溶液中形成新的缔合物,利用共振光散射技术进行测定。结果表明:其最大共振光散射峰位于625nm波长处,在0.00~2.50μg/mL范围内新霉素质量浓度与体系的相对散射光强度(ΔI)有良好的线性关系,相关系数r=0.9978,检出限为0.013μg/mL;样品测定的RSD小于2.5%(n=5),加标回收率为84.0%~96.7%。此法快速简便、灵敏度较高,用于牛奶中新霉素残留量的测定,结果满意。

关键词: 共振光散射, 新霉素, 酸性品红, 牛奶

Abstract: In order to explore a novel method for the rapid determination of neomycin residues in milk, ultra high temperature (UHT)-sterilized pure milk from supermarket was used as the sample to determine neomycin residues in milk on basis of the reaction between neomycin and acidic fuchsin in Britton-Robinson buffer at pH 5.50 through resonance light scattering (RLS) technology. Results indicated that the maximum RLS peak was observed at 625 nm. A good liner relationship (r = 0.9978) was observed in chlorpyrifos concentration range of 0.00–2.50 μg/mL and the detection limit of neomycin was 0.013 μg/mL. The relative standard deviations (RSD) of the precision tests for 5 repeated determinations of all samples were less than 2.5%. The recovery rate of this developed method was in the range of 84.0%–96.7%. Due to simple operation, rapid determination and high sensitivity, this developed method is suitable for the determination of neomycin residues in milk.

Key words: resonance light scattering, neomycin, acidic fuchsin, milk

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