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镍铬硅硼合金试样由于很难在盐酸、硝酸、王水等酸中溶解完全,因此准确、快速的测定其残余铝含量,给分析者提出了一个新任务.本文经试验,确定用氢氟酸—王水于聚四氟乙烯烧杯中使试样能很快溶解完全,同时以铜试剂沉淀分离后直接在滤液中用半二甲酚橙与铝显色并进行测定,方法简单、快速,重现性好,适用于0.01%以上铝的分析.
Because it is difficult to dissolve completely in the acid such as hydrochloric acid, nitric acid, aqua regia, etc., the accurate determination of the residual aluminum content in the nickel-chromium-silicon-boron alloy poses a new task for the analyst.Through the experiment, Hydrofluoric acid - aqua regia in teflon beaker so that the sample can be quickly dissolved completely, while the precipitation of copper reagent precipitation directly after the filtrate with half-xylenol orange and aluminum color and determination, the method is simple, fast , Reproducible, suitable for more than 0.01% of the analysis of aluminum.