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四-(4-三甲铵苯基)卟啉测定食品中的痕量铜 被引量:2

Spectrophotometric Determinationof Ultramicro Amount of Copper in Food with α,β,γ,δ-tetrakis(-4-trimethylammonium phenyl)-T-(4-TAP)P
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摘要 以水溶性α.β.γ.δ—四—(4—三甲铵苯基)卟啉[T-(4-TAP)P]作显色剂,测定了食品中的痕量铜。对实验条件及共存离子的干扰进行了探讨。在乙醇介质及强酸条件下测定时,其选择性及灵敏度均有显著提高。摩尔吸收系数为4.5×10~5 1mol^(-1).cm^(-1)最小检验量为:0.14ng/cm^2,回收率为96.2~106%,变异系数为:0.46~3.6%。操作简便,结果满意。 A new soluble porphyria T-(4-TAP)P was used as spectrophotometric reagent for determination of ultramicro amount of copper in food, The experimental conditions and interference of 15 kinds of ions were studied. The-specificity and sensitivity were both increassed in. alcoholic media and strong acid solution. E=4.5×10~5 1.mol^(-1)·ocm^(-l). The detection limit was 0.14ng/cm^2, the recovery was 96.2-106%, and the coefficient of variation was 0.46-3.6%. The procedure was simple and the results were satisfactory.
出处 《无锡轻工业学院学报》 CSCD 1989年第1期13-20,共8页
关键词 食品检测 痕量 卟啉化合物 Absorption spectra, Calibration curve Vecoveray, Sensitivity
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参考文献2

  • 1童沈阳,孙国斌.卟啉在分析化学中的应用[J]化学试剂,1987(01).
  • 2张传铀,程介克.α、β、γ、δ-四-(4-三甲铵苯基)卟啉催化及在水-乙醇介质中吸光光度法测定痕量铜的研究[J]化学通报,1983(01).

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