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金属镍中微量锡的测定,广泛应用苯萃取SnI_4与镍等干扰元素分离的苯芴酮比色法,或甲基异丁基酮(MIBK)萃取锡(IV)的苯芴酮直接比色法等。金属铜中微量锡的测定,多采用二氧化锰共沉淀锡或MIBK萃取锡的苯芴酮比色法。金属锌中微量锡的测定,目前采用铜铁试剂-三氯甲烷萃取分离,苯芴酮比色法,或MIBK萃取锡-苯芴酮直接比色法等。这些方法多用具有一定气味和有害健康的有机溶剂,热天尤其不受欢迎。近年来,用邻苯二酚紫(简称PV)-
Determination of tin in metallic nickel, widely used benzene extraction SnI_4 and nickel interference elements such as separation of benzofluorenone colorimetry, or methyl isobutyl ketone (MIBK) tin (IV) benzofluorenone direct colorimetry Wait. Determination of trace amounts of tin in copper metal, manganese dioxide coprecipitation tin or MIBK tin extraction benzofluorenone colorimetric method. Determination of trace tin in zinc metal, copper and iron reagent - chloroform extraction, benzene fluorenone colorimetric method, or MIBK extraction tin - phenyl fluorenone direct colorimetric method. These methods use organic solvents that have a certain odor and are detrimental to health. Hot days are especially unpopular. In recent years, with catechol purple (referred to as PV) -