【摘要】 四-（4-氯-3-磺酸苯基）卟啉是一种新显色剂,在微酸性（pH 4.9～5.3）介质中,有混合表面活性剂CPC-OP存在下与Cu（Ⅱ）形成稳定的配合物,最大吸收波长在420nm处,铜量在0.5～4.5pg/25ml范围内符合比耳定律,求算表观摩尔吸光系数ε₄₂₀=2.96×10⁵L·mol^-1·cm^-1,用双峰双波长光度法测定,相应的表观摩尔吸光系数ε′_420-445=5.71×10⁵L·mol^-1·cm^-1。用拟定的方法进行样品中微量铜的测定,结果满意。更多还原

【Abstract】 It is found that the aboved mentioned new reagent [T-（4-Cl-3-SP）P] reacts with Cu（Ⅱ） in a slightly acidic buffer solution of pH 4. 9⁵. 3 to form a stable complex, in the presence of CPC and OP. The absorption maxima lies at the wavelength of 420nm. Beer’s law holds in the range of 0.5⁴. 5μg of copper per 25ml. The apparent molar absorptivity is 3.0×10⁵L ·mol^-1 ·cm^-1, and a higher value is obtained (5. 7×10⁵L ·mol^-1 ·cm^-1) when DW-measurement is used. The proposed method has leen applied to the determination of copper in rocks and aluminium alloys.更多还原