【作者】 陈运生； 吴晓梅； 马胜强； 谢莉； 宋君瑞； 刘旭东；

【Author】 Chen Yunsheng Wu Xiaomei Ma Shengqiang Xie Li Songjunrui Liu Xudong(Huaibei Environment Monitoring Station, Huaibei 235000)

【机构】 淮北市环境保护监测站；

【摘要】 在pH1.89溶液中,镧（Ⅲ）与偶氮氯膦MK（CPAMK）发生配位反应,本文应用光谱修正理论研究配合物溶液性质参数如络合物组成比、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La（CPAMK）₆,在668nm波长处真实摩尔吸收系数ε=1.13×10⁵lmol^-1cm^-1,其累积稳定常数K=3.66×10³⁷。更多还原

【Abstract】 The reaction between lanthanum ( I ) and chlorophosphonazo MK (CPAMK) was sensitive at pH 1. 89. The spectra correction principle was used to investigate the properties of La-CPAMK complex, which involved the complexation ratio, stepwise absorptivity and stability constant. Results showed that the formed complex was expressed as : La (CPAMK)6, its real (not apparent) absorptivity being 1. 13 × 105lmol-1cm-1 at 668nm and its cumulative stability constant being 3. 66 × 1037.更多还原