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矿物岩石中微量锡的测定,常采用苯芴酮,茜素紫或磷苯二酚紫分光光度法测定,但方法繁琐,控制条件较严。近年来国内常采用四价钒和氯化铵或氯化钠体系中用催化极谱测定锡,但在生产应用中仍有一定的局限性。我们在研究锡的络会吸附波中,发现锡在PMBP——二苯狐——氯化钠——硫酸体系中有一个稳定、灵敏、对称的络合吸附催化波。灵敏度可达0.02微克/毫升,峰值电位在-0.52伏左右(饱和甘汞电极)。为此,
Determination of trace amounts of tin in mineral rock, often using benzene fluorenone, alizarin purple or pyrochloride violet spectrophotometry, but the method is cumbersome, the control conditions are more stringent. In recent years, the domestic commonly used tetravalent vanadium and ammonium chloride or sodium chloride system catalytic polarographic determination of tin, but there are still some limitations in the production and application. We are studying the tin network will adsorb the wave and found that tin in the PMBP - diphenyl fox - sodium chloride - sulfuric acid system has a stable, sensitive, symmetric complex adsorption catalytic wave. Sensitivity of up to 0.02 micrograms / milliliter, the peak potential of -0.52 V or so (saturated calomel electrode). to this end,