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含有苛性钠、碳酸钠和磷酸三钠的溶液,在许多生产工艺过程中被用作除油溶液。我们推荐对每一组分首先用酚钛和甲基橙为指示剂、盐酸标准溶液滴定,然后用酚钛作指示剂、氢氧化钠标准溶液滴定同一试样的快速分析方法。混合试样的组成,按反应特点以计算法测定。在100毫升锥形烧瓶中移入10毫升试液,加蒸馏水10毫升,2～3滴酚钛溶液,以0.1N盐酸滴至无色。然后在该溶液中加入2～3滴甲基橙,并滴至呈淡
Solutions containing caustic soda, sodium carbonate and trisodium phosphate are used as degreasing solutions in many production processes. We recommend that each component should be titrated with a standard solution of hydrochloric acid and titanium alkoxide, followed by titration with a standard solution of hydrochloric acid and titanium alkoxide, followed by rapid titration of the same sample with sodium hydroxide standard solution. The composition of the mixed sample is determined by the calculation method according to the reaction characteristics. Ten ml of the test solution was transferred to a 100 ml Erlenmeyer flask, 10 ml of distilled water was added, and 2 to 3 drops of a titanium phenoxide solution were dropped to colorlessness with 0.1 N hydrochloric acid. Then add 2-3 drops of methyl orange to this solution and drip until it is light