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采用铜铁试剂-氯仿萃取分离钦、钒、铁、锆、铌、钽等干扰元素之后,用铬天青-S比色测定铝,提高了方法的选择性和准确度,操作简易快速。适用于铁基、镍基和钛基合金中铝的快速分析。 (一)主要试剂铬天青-S:(0.05％;5％乙醇溶液)。铝标准溶液:(1毫克铝/毫升)。称取光谱纯铝粉1.000克于250毫升烧杯中,加入30％氢氧化钠30毫升,加热溶解后,移入1000毫升容量瓶中,加水约
Chromium Azine-S colorimetric determination of aluminum with copper-iron reagent-chloroform extraction of interfering elements such as chromium, vanadium, iron, zirconium, niobium and tantalum improves the selectivity and accuracy of the method, making it easy and fast to operate. Suitable for rapid analysis of aluminum in iron-based, nickel-based and titanium-based alloys. (A) The main reagent chrome azure-S: (0.05%; 5% ethanol solution). Aluminum standard solution: (1 mg aluminum / ml). Weigh spectral pure aluminum powder 1.000 grams in 250 ml beaker, add 30 ml of 30% sodium hydroxide, heated to dissolve, into 1000 ml volumetric flask, add water about