| 纳米金催化光度法检测食品中的甲醛 |
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| 引用本文： | 王鹏飞,杨玲,梁爱惠,蒋治良.纳米金催化光度法检测食品中的甲醛[J].分析测试技术与仪器,2009,15(4):212-215. |
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| 作者姓名： | 王鹏飞 杨玲 梁爱惠 蒋治良 |
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| 作者单位： | 1. 桂林理工大学,化学与生物工程学院,广西,桂林,541004
2. 广西师范大学,环境与资源学院,广西环境工程与保护评价重点实验室,广西,桂林,541004 |
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| 基金项目： | 广西自然基金，广西环境工程与保护评价重点实验室基金 |
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| 摘 要： | 采用分光光度法检测以纳米金催化甲醛与菲林试剂反应生成的氧化亚铜微粒在870nm处的吸收值，建立了一种测定食品中甲醛的新方法．研究了纳米金、菲林试剂用量及反应温度、反应时间、共存离子的影响．在最佳实验条件下，甲醛浓度在1．2-600．0μg／mL范围内与吸光值△A线性关系良好，线性回归方程为△A870nm=0．0014C＋0．0627，相关系数为0．9992，检出限为0．45μg／mL．加标回收率为98．0％～100．3％．该法灵敏度高，选择性好，体系干扰少，用于测定腐竹、精制粉丝、红薯粉丝和方便面中甲醛的含量获得满意的结果．
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| 关 键 词： | 纳米金 催化 甲醛 分光光度法 食品 |
| 收稿时间： | 8/4/2009 12:00:00 AM |
| 修稿时间： | 9/8/2009 12:00:00 AM |
Catalytic Spectrophotometric Determination of Trace Formaldehyde in Food by Nanogold |
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| WANG Peng-fei,YANG Ling,LIANG Ai-hui and JIANG Zhi-liang.Catalytic Spectrophotometric Determination of Trace Formaldehyde in Food by Nanogold[J].Analysis and Testing Technology and Instruments,2009,15(4):212-215. |
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| Authors: | WANG Peng-fei YANG Ling LIANG Ai-hui and JIANG Zhi-liang |
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| Institution: | WANG Peng-fei1,YANG Ling1,LIANG Ai-hui2,JIANG Zhi-liang2(1.School of Chemical and Bioengineering,Guilin University of Technology,Guilin 541004,China,2.School of Environment and Resource,Guangxi Normal University,Guangxi Key Laboratory of Environmental Engineering,Protection and Assessment,China) |
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| Abstract: | A new catalytic-spectrophotmetric method for determination of formaldehyde in food has been setup.In this method nanogold is used as the catalyst,which catalyzes the reaction of formaldehyde and Fehling reagent,and its product,cuprous oxide(Cu2O) particles,shows a broad absorption peak between 400~900 nm.A spectrohpotometric methed is used to measure the Cu2O absorption value at 870 nm.Experimental conditions of the formaldehyde-Fehling reagent-nanogold catalytic reaction were optimized.In the proposed meth... |
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| Keywords: | nanogold catalysis formaldehyde spectrophotmetry food |
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