食品科学 ›› 2011, Vol. 32 ›› Issue (18): 282-285.doi: 10.7506/spkx1002-6630-201118063

• 分析检测 • 上一篇    下一篇

快速检测饮用水中镉的光电型传感器的建立

商 璟, 柴春彦, 翁芝莹, 张洪才, 刘国艳*   

  1. 上海交通大学农业与生物学院
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    上海市科委技术标准专项(06DZ05036)

Development of Photoelectrical Sensor for the Determination of Cadmium

SHANG Jing,CHAI Chun-yan,WENG Zhi-ying,ZHANG Hong-cai,LIU Guo-yan﹡   

  1. (School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China)
  • Online:2011-09-25 Published:2011-09-24

摘要: 利用1-4-(硝基苯)-3-(3-甲基吡啶)三氮烯与镉络合显色的原理,将1-4-(硝基苯)-3-(3-甲基吡啶)三氮烯固定化制成试纸条,插入自制的便携式单色光反射计,组装出检测镉的光电型传感器。结果表明:当镉浓度范围为0.0179~0.2857mmol/L时,光反射率与镉浓度呈现良好的线性关系。优化检测条件后,该方法的检出限为0.00348mmol/L,检测时间为2min。此种方法检测镉所需时间短、操作简便,有望实现镉的现场检测。

关键词: 镉, 光电传感器, 1-4-(硝基苯)-3-(3-甲基吡啶)三氮烯

Abstract: A test strip for the detection of cadmium was developed by immobilizing 1-(4-nitrophenyl)-3-(3- methyl-pyridyl) triazene, a chromogenic agent specific for cadmium, onto a supporting pad. After the test strip was inserted into a self-made photoelectrical sensor, the reflectivity was recorded as the sensor signal. A standard calibration curve was established between reflectivity and cadmium concentration in standard solution. The results showed that this photoelectrical sensor could detect cadmium over the concentration range of 0.0179-0.2857 mmol/L within 2 min and revealed a detect limit of 0.00348 mmol/L. This technique exhibited the advantages of short assay time and convenient operation. Therefore, this photoelectrical sensor has the potential to apply in the on-site detection of cadmium.

Key words: cadmium, photoelectrical biosensor, 1-(4-nitrophenyl)-3-(3-methyl-pyridyl) triazene

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