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锰在一般分析中,都采用氧化还原滴定,这样就决定了两个条件:首先必须将溶液中的锰全部氧化为7价,其次是溶解样品避用盐酸。这两个条件也正是方法的缺点。如改用氨羧络合滴定,便相应地显出它的优点:首先溶液有多少毫克锰全部与氨羧络合剂作用,其次是盐酸溶样快速完全。兹将氨羧络合滴定方法简述于下: 1.锰矿取样0.1克,加1:1盐酸25毫升,煮沸溶解,至溶液透明而无黑色微粒为止。稀释至250毫升容量瓶中摇匀,吸出50毫升溶液两分,分别煮沸,小心滴加氨水至溶液加一滴后变黄,煮沸即有沉淀析出。然后过滤
Manganese in the general analysis, the use of redox titration, thus determining two conditions: First, the manganese must be all oxidation of the solution 7 valence, followed by the dissolution of the sample to avoid hydrochloric acid. These two conditions are just the shortcomings of the method. Such as the use of ammonia carboxylate titration, it will show its corresponding advantages: First, how many mg of manganese solution and ammonia complexing agent, followed by hydrochloric acid sample quickly and completely. Hereby ammonia carboxy complex titration method described in the following: 1. Manganese ore samples 0.1 grams, plus 1: 1 hydrochloric acid 25 ml, boiled and dissolved until the solution is transparent and no black particles so far. Dilute to 250 ml volumetric flask shake, aspirate 50 ml of solution two minutes, respectively, boil, carefully dropping ammonia solution to the solution plus a drop of yellow, the precipitate is precipitated by boiling. Then filter