用原子吸收分光光度计取代可见 紫外分光光度计以Fe空心阴极灯为光源 ,测定 6 硝基苯并噻唑三氮烯与铜的显色反应 .在曲拉通X 1 0 0存在下 ,pH =1 0 .8～ 1 2 5酸度范围内 ,6 硝基苯并噻唑三氮烯与铜形成红色络合物 ,λmax=53 9.8nm ,ε表观 =1 4 6× 1 0 5L·mol- 1·cm- 1,铜含量在 0～ 60 0 μg/L范围内服从比尔定律 .应用于铝合金中铜含量的测定 ,RE为 0 4 2 % ,RSD为 1 3 % ,加标回收率为 1 0 0 4 % . The color reaction of 6-nitrobenzothiazoly triazene with copper was determined by using atomic absorption spectrophotometer instead of visible ultraviolet spectrophotometer with Fe hollow cathode lamp as light source.Under the condition of Triton X 1 0 0, pH = 1 0 .8 ~ 1 2 5 within the acidity range, 6 nitrobenzothiazole triazene and copper to form a red complex, λmax = 53 9.8nm, ε apparent = 146 × 105L · mol-1 · Cm-1, Beer’s law was obeyed in the range of 0 ~ 60 μg / L. The copper content in the aluminum alloy was 0 42% RE, 13% RSD and 1 spike recovery 0 0 4%.