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。 Trace amount of copper in food was determined with water-soluble α.β.γ.δ-tetrakis- (4-trimethyl ammonium phenyl) porphyrin [T- (4-TAP) P] The experimental conditions and the coexistence of ion interference were discussed. In ethanol medium and strong acid conditions, the selectivity and sensitivity were significantly improved. The molar absorption coefficient is 4.5 × 10 ~ 5 1mol ~ (-1). The minimum test quantity is 0.14ng / cm ~ 2, the recovery is 96.2 ~ 106% and the coefficient of variation is 0.46 ~ 3.6% . Easy to operate, the results are satisfactory.