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用离子选择性电极电位法测定了pH 5.48、6.46时黄腐植酸合铜的条件稳定常数logβ_1、分别为5.18、6.08,Lgβ_2别为10.40、11.37、Lg β_3分别为14.49,16.34,pH 5.466.50时黄腐植酸合镉的条件稳定常数Lgβ_1分别为4.18、4.62:Lgβ_2分别为8.64、9.21,Lgβ_3分别为13.24,14.01;黄植酸与铜、镉离子都能形成1:1、1:2,1:3的络合物;pH 5.54、5.98、和6.00时黄腐植酸与铅形成1:1、1:2的络合物,相应的条件稳定常数分别为Lgβ_14.90、5.22、5.26;Lgβ_2分别为9.16、9.61和9.82。测得黄腐植酸的平均分子量平均值为1304。
Ion-selective electrode potentiometric method was used to determine the conditional stability constants of β-humic acid copper at pH 5.48,6.46 logβ_1, which were respectively 5.18,6.08, 10.40 and 11.37 for Lgβ_2, 14.49 and 16.34 for Lgβ_3, pH 5.466.50 Lgβ_1 was 4.18 and 4.62 respectively: Lgβ_2 were 8.64 and 9.21, Lgβ_3 was 13.24 and 14.01 respectively. Both phytic acid and copper and cadmium ions could form 1: 1, 1: 2, 1: 3 complex at pH 5.54, 5.98, and 6.00, respectively. The corresponding stability constants were Lgβ_14.90,5.22,5.26 and Lgβ_2 Respectively 9.16, 9.61 and 9.82. The mean average molecular weight of humic acid measured was 1304.