食品科学

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双水相萃取-流动注射化学发光法测定果蔬中残留α-萘乙酸

高向阳,王 珊,陈 双,朱盈蕊   

  1. 1.郑州科技学院食品科学与工程学院,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;3.郑州市质量技术监督检验测试中心,河南 郑州 450006
  • 出版日期:2013-10-25 发布日期:2013-09-28

Determination of α-Naphthaleneacetic Acid in Vegetables and Fruits by Flow Injection Chemiluminescence with Aqueous Two-Phase Extraction

GAO Xiang-yang,WANG Shan,CHEN Shuang,ZHU Ying-rui   

  1. 1. School of Food Science and Engineering, University for Science and Technology Zhengzhou, Zhengzhou 450064, China;
    2. College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China;
    3. Zhengzhou Supervision and Testing Center for Quality and Technology, Zhengzhou 450006, China
  • Online:2013-10-25 Published:2013-09-28

摘要:

建立一种快速测定果蔬中残留α-萘乙酸的新方法。α-萘乙酸经乙醇-(NH4)2SO4溶液双水相体系萃取,利用其对Luminol-H2O2-Cr3+化学发光体系的抑制作用进行测定。结果表明:方法的线性范围为1.0×10-9~1.0×10-4mol/L,r=0.9976,对1.0×10-8mol/L α-萘乙酸进行11次平行测定的相对标准偏差为3.2%,按3倍标准偏差计算的方法检出限为3.98ng/g,平均加标回收率为88.9%~92.1%。该法线性范围宽、灵敏度高、易实现自动化,用于测定果蔬中残留的α-萘乙酸,结果令人满意。

关键词: 双水相萃取, 流动注射化学发光, 果蔬, &alpha, -萘乙酸

Abstract:

A flow injection chemiluminescence method was established for the fast determination of α-naphthaleneacetic
acid (NAA) in vegetables and fruits based on its suppressive effect on the reaction between Luminol and hydrogen
peroxide. NAA residue was extracted with ethanol/ammonium sulfate. The linear range of this method was 1.0 × 10-9
to 1.0 × 10-4 mol/L, with correlation coefficient of 0.9976, the detection limit was 3.98 ng/g, the relative standard
deviation (RSD) was 3.2% for 11 parallel determinations, and the recovery rate was 88.99% to 92.1%. This method had the
advantages of wide linear range, high sensitivity and ease of automatic operation and was applied with satisfactory results in
the determination of NAA in vegetables and fruits.

Key words: aqueous two-phase extraction;flow injection-chemiluminescence;vegetables and fruits;&alpha, -naphthaleneacetic acid