食品科学

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纳米二氧化铈化学发光抑制法测定抗坏血酸

石文兵,贺 薇*,万帮江   

  1. 无机特种功能材料重庆市重点实验室,长江师范学院化学化工学院,重庆 408100
  • 出版日期:2015-12-25 发布日期:2015-12-24
  • 通讯作者: 贺 薇
  • 基金资助:

    国家自然科学基金面上项目(21275021);重庆市教委科学研究项目(KJ1401201;KJ1401220);
    长江师范学院青年科研人才成长支持计划项目

Determination of Ascorbic Acid Based on its Inhibition on Nano-Ceria Chemiluminescence

SHI Wenbing, HE Wei*, WANG Bangjiang   

  1. Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering,
    Yangtze Normal University, Chongqing 408100, China
  • Online:2015-12-25 Published:2015-12-24
  • Contact: HE Wei

摘要:

基于抗坏血酸抑制纳米二氧化铈-过氧化氢-鲁米诺体系的发光强度,建立流动注射化学发光法检测抗坏血酸含量的新方法。考察过氧化氢浓度、鲁米诺浓度、纳米二氧化铈质量浓度及pH值对发光强度的影响。在优化条件下,该方法对抗坏血酸检测的线性范围为0.001~1.0 mg/mL(r = 0.983 1),检出限(3 σ)为0.2 ng/mL,对质量浓度为1.0 mg/mL的抗坏血酸进行11 次平行测定,相对标准偏差为2.9%。该法已成功用于水果、果汁和蔬菜中抗坏血酸含量的测定,方法简单、灵敏、快速。

关键词: 纳米二氧化铈, 化学发光, 抗坏血酸

Abstract:

A new flow injection chemiluminescence (CL) method based on the inhibition of ascorbic acid on nano-ceria-
H2O2-luminol CL system has been developed for the determination of ascorbic acid (AA). The effects of concentrations of
H2O2, luminol and nano-ceria, and pH on CL intensity were investigated respectively. Under the optimum conditions, the
linear range of the method was 0.001–1.0 mg/mL (r = 0.983 1), and the detection limit (3σ) was 0.2 ng/mL. The relative
standard deviation (RSD) for 11 repetitive determinations of 1.0 mg/mL AA was 2.9%. The method is simple, sensitive and
fast and has been successfully applied to determine ascorbic acid in fruits, juices and vegetables.

Key words: nano-ceria, chemiluminescence, ascorbic acid

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