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本文报告了用TAA沉淀Zn~(2+)的适宜条件:〔Zn~(2+)〕=2毫克/0.2毫升,pH=6,13%TAA 4滴,缓冲液2ml,加热9分钟. 拟订了一个改进的系统定性分析中Zn~(2+)的分离步骤.本法能在Zn~(2+)与Co~(2+)、Ni~(2+)、Mn~(2+)共存时以1∶15的界限比分离Zn~(2+)仍能得到白色ZnS沉淀.实践证明本法分离效果较好,克服了过去Zn~(2+)在硫化铵组系统分析时少量Zn~(2+)的损失和ZnS沉淀呈灰或灰黑色缺点.
In this paper, we report the optimum condition for the precipitation of Zn2 + with TAA: [Zn2 +] = 2 mg / 0.2 ml, pH = 6, 13% TAA 4 drops, buffer 2 ml and heating for 9 minutes An improved method for the separation of Zn2 + from the qualitative analysis of the system is presented in this paper, which can coexist with Zn2 +, Co2 +, Ni2 + and Mn2 + When Zn ~ (2+) is separated by the limit of 1:15, white ZnS precipitate can be obtained.It has been proved by practice that this method has a good separation effect and overcomes the problems of the past Zn ~ (2+) (2+) loss and precipitation of ZnS gray or gray black shortcomings.