食品科学 ›› 2011, Vol. 32 ›› Issue (18): 246-248.doi: 10.7506/spkx1002-6630-201118054

• 分析检测 • 上一篇    下一篇

衍生电化学法测定桔皮中的咪酰胺

李 静1,李红波1,2,*,胡效亚2   

  1. 1.盐城工学院化学与生物工程学院 2.扬州大学化学化工学院
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    国家自然科学基金面上基金项目(20875081;21075107); 盐城工学院自然科学基金项目(XKY2009009)

Electrochemical Determination of Prochloraz in Orange Peel after Derivatization

LI Jing1,LI Hong-bo1,2,*,HU Xiao-ya2   

  1. (1. Chemical and Biological Engineering College, Yancheng Institute of Technology, Yancheng 224051, China; 2. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China)
  • Online:2011-09-25 Published:2011-09-24

摘要: 采取简便的衍生电化学法灵敏地测定橘皮中的咪酰胺。用丙酮和乙酸乙酯分别萃取橘皮中的咪酰胺,然后用吡啶盐酸盐对其进行水解,使没有电化学活性的咪酰胺生成具有电化学活性的2,4,6-三氯苯酚。在优化实验条件(pH4.0,富集电位和富集时间分别是0V和300s)下,运用差示脉冲溶出伏安法建立测定橘皮中咪酰胺含量的新方法。进一步实验结果表明,2,4,6-三氯苯酚氧化峰电流与其浓度在9.0×10-9~8.0×10-5mol/L范围内呈良好的线性关系,检出限为9.7×10-10mol/L,回收率为98.5%~113.0%。

关键词: 桔皮, 衍生, 电化学, 咪酰胺

Abstract: A method to determine prochloraz in orange peel by electrochemistry analysis after derivatization was developed. Prochloraz was stepwise extracted by acetone and ethyl acetate, and hydrolyzed into electrochemical active 2,4,6-trichlorophenol by pyridine hydrochloride. Differential pulse stripping voltammetry (DPSV) was utilized to determine prochloraz under the optimized conditions pH 4.0 and accumulation at 0 V potential for 300 s. The results showed that oxidative peak current of 2,4,6-trichlorophenol was positively linearly correlated with its concentration within the range of 9.0 × 10-9-8.0 × 10-5 mol/L. The detection limit was 9.7 × 10-10 mol/L, and the recovery between 98.5% and 113.0%.

Key words: derivatization, electrochemistry, prochloraz, orange peel

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