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几年来,为了配合我厂生产,经过许多次试验,拟订了铝锆合金中锆铁的测定方法。锆用EDTA络合滴定法,方法快速、成本低廉、结果准确、稳定可靠。Fe的测定,我们采用经典的K_2Cr_2O_7容量法,但不使用汞盐,因汞盐是剧毒,会造成环境污染。一试剂 SnCl_2:称10克SnCl_2以10ml浓盐酸溶解,以水稀至100ml: EDTA-Na_2标准溶液0.01M(或0.02M); K_2Cr_2O_7标准溶液0.01N; 二甲酚橙:0.1%水溶液。甲基橙:0.1%水溶液。二苯胺磺酸钠:0.5%水溶液。
Over the past few years, in line with our factory production, after many tests, developed zirconium-aluminum alloy zirconium determination. Zirconium complexation with EDTA titration, rapid method, low cost, accurate results, stable and reliable. Fe determination, we use the classic K_2Cr_2O_7 capacity method, but do not use mercury salts, mercury salt is highly toxic, can cause environmental pollution. A reagent SnCl_2: Weigh 10 grams of SnCl_2 dissolved in 10ml of concentrated hydrochloric acid, diluted with water to 100ml: EDTA-Na 2 standard solution 0.01M (or 0.02M); K 2 Cr 2 O 7 standard solution 0.01N; xylenol orange: 0.1% aqueous solution. Methyl orange: 0.1% aqueous solution. Sodium diphenylamine sulfonate: 0.5% aqueous solution.