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一试样处理称取0.1～0.5克试样于铂坩埚中,先用数滴水润湿,加H_2SO_4(1+1)数滴,HF10～15ml,置电炉上加热蒸干,取下,加无水Na_2CO_3约3克,置马弗炉中900～1000℃熔融10分钟,取出冷却,于250ml烧杯中用热水浸取熔块。坩埚上的沉淀用几滴H_2SO_4(1+5)溶解,用水冲洗干净,加少许乙醇(约10～15ml)煮沸3～5分钟,使锰还原。将溶液与沉淀一并移入100ml量瓶中,用水冲至刻度,摇匀,以中速滤纸干滤。收集滤液以备测定。
A sample processing Weigh 0.1 ~ 0.5 grams of the sample in a platinum crucible, moistened with a few drops of water, add H_2SO_4 (1 +1) a few drops of HF10 ~ 15ml, placed on the electric stove and evaporated to dryness, remove, plus no Approximately 3 grams of water Na_2CO_3 was melted in a muffle furnace at 900 to 1000 ° C for 10 minutes, removed and cooled and leached in a 250 ml beaker with hot water. Precipitate on the crucible with a few drops of H 2 SO 4 (1 +5) dissolved, rinse with water, add a little ethanol (about 10 ~ 15ml) boil 3 to 5 minutes, the manganese reduction. The solution and the precipitate were transferred to 100ml volumetric flask, washed with water to the mark, shake, medium speed filter paper dry filtration. The filtrate was collected for determination.