【摘要】 在pH 10.88溶液中，铌 （V）与偶氮氯膦 MK（CPAMK）发生配位反应。本文应用光谱修正技术研究配合物溶液性质常数如络合物组成比、逐级摩尔吸收系数、稳定常数等的测定。结果表明：所生成配合物为 Nb（CPAMK）8，在 654 nm波长处真实摩尔吸收系数ε=3.62× 104 lmol^-1· cm^-1，其累积稳定常数 K=9.4× 10⁴³。更多还原

【Abstract】 The reaction between niobium（V） and chlorophosphonazo MK（CPAMK） was sensitive at pH 10.88.The spectra correctiontechnique was applied to investigate the property coustauts of the Nb-CPAMK complex,such as the complexation ratio,stepwise absorptivity and stability constant.Results showed that the formed complex was expressed as:Nb（CPAMK）8,its real（not apparent） absorptivity 3.62× 104 lmol^-1cm^-1 at 654 nm and its cumulative stability constant 9.4×10⁴³.更多还原