铝在锡青铜中以杂质状态存在,一般要求含量小于0.02%,我们参照“Modern Methods of Analysisof Copper and Its Alloys”一书所介绍的铬青R直接显色法测定微量铝获得较好效果。该方法较简便,灵敏度较高,完全能满足日常分析要求。一试剂缓冲溶液:160克硫代硫酸钠和80克乙酸钠加水溶解,稀释至1000毫升; 铬青R(Eriochromecyanine):称取铬青R 1.000 Aluminum in the presence of impurities in tin bronze, the general requirements of the content of less than 0.02%, we refer to “Modern Methods of Analysis of Copper and Its Alloys ” a book describes the chromium cyanine R direct determination of trace aluminum to obtain better results . The method is simple, high sensitivity, fully meet the daily analysis requirements. A reagent buffer solution: 160 g of sodium thiosulfate and 80 g of sodium acetate dissolved in water, diluted to 1000 ml; Chromin R (Eriochromecyanine): Weigh Cr Chromium R 1.000