一、方法提要和試驗部分試样用硝酸溶解(含錫鋁青銅应将偏錫酸过滤除去),試液用新鮮配制的氫氧化鈉沉淀分离Fe、Cu、Mn、Ni、Mg、Cr~Ⅲ,假若試样中含有較高的鋅,則在沉淀分离而加入相当量的三价铬盐(三氯化鉻或鉻矾)以共沉淀大部分Zn。滤液中則只含有Al、Pb、Mn(部分)、Zn(少量)。假若试样中上述杂质元素 First, the method summary and test part of the sample is dissolved with nitric acid (tin aluminum bronze should remove the stannous acid), the test solution with freshly prepared sodium hydroxide precipitation Fe, Cu, Mn, Ni, Mg, Cr ~ Ⅲ, If the sample contains a higher amount of zinc, a considerable amount of trivalent chromium salt (chromium trichloride or chromium alum) is added in the precipitate to precipitate copious amounts of Zn. The filtrate contains only Al, Pb, Mn (part), Zn (a small amount). If the sample in the above impurity elements