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高含量铅、锡极谱法同时测定的试验巳有报道,至于微量铅、锡的示波极谱法同时测定,则尚未见有这方面的文章。我们在研究锡的极谱测定时,发现在四丁基溴化铵—溴化钾—硫酸体系中,铅锡的波能够分开。铅的峰电位为-0.46伏(对SCE,以下同);锡的峰电位为-0.51伏。又根据文献在高酸度下,EDTA能掩蔽锡而不影响铅(当加入EDTA时,铅峰稍往负移)的测定,从而提出在四丁基溴化铵—溴化钾—盐酸体系中,进
High-content lead and tin polarographic simultaneous determination of the test has been reported, as for the trace lead and tin oscillopolarographic simultaneous determination, there is no such article. When we studied the polarographic determination of tin, we found that in the tetrabutyl ammonium bromide-potassium bromide-sulfuric acid system, the tin-lead wave can be separated. The peak potential of lead is -0.46 V (for SCE, the same applies below); the peak potential of tin is -0.51 V. According to the literature in the high acidity, EDTA can mask the tin without affecting the lead (when adding EDTA, the lead peak slightly negative shift) determination, thus proposed in tetrabutylammonium bromide - potassium bromide - hydrochloric acid system, Enter