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4,4’-二硝基重氮氨基苯(O_2N-C_6H_4-N=N-NH-C_6H_4NO_2,以下简称“DNAAB”)可溶于苛性碱溶液而呈洋红色.迄今似尚未用于无机分析.我们找出DNAAB于苛性钾溶液中的玫瑰红色可被汞(II),镉(II)和银(I)等离子减褪.可借以测定这些元素.本文研究用此试剂光度测定微量汞的有关条件,并找出在测定条件下的Hg(II)-DNAAB之化合比.矿石和含多种金属硫酸盐水溶液中微量汞,经适当分离后用本法测定,得到满意的结果.
4,4’-Dinitro-diazoaminobenzene (O_2N-C_6H_4-N = N-NH-C_6H_4NO_2, hereinafter referred to as “DNAAB”) is soluble in caustic solution and appears magenta. We found that the rose of DNAAB in caustic potash solution can be reduced by the mercury (II), cadmium (II) and silver (I) ions, which can be used to determine these elements.In this paper, the photometric determination of trace mercury The relevant conditions and to find out the determination of the Hg (II) -DNAAB of the compound ratio of ore and a variety of metal sulfate aqueous solution of trace mercury, after appropriate separation by this method to obtain satisfactory results.