氢氧化钾相信大家都不陌生了吧，那么它的质量指标是什么呢？接下来跟随小编一起简单了解一下吧。

It is believed that everyone is familiar with potassium hydroxide. What is its quality index? Let's follow Xiao Bian to have a brief understanding.

1、水不溶物：5%氢氧化钾试样水溶液应无色透明。

1. Water insoluble matter: 5% potassium hydroxide sample aqueous solution shall be colorless and transparent.

2、铅：取试样1g溶于5ml水和11ml稀盐酸试液的混合液中，冷却。以此作为试样液按GT-18方法测定。对照液中的铅离子量取10μg。

2. Lead: Dissolve 1g of sample in 5ml water and 11ml dilute hydrochloric acid test solution, and cool it. Take this as the sample solution and determine according to GT-18 method. The amount of lead ion in the control solution is 10 μ g。

3、碳酸盐：在含量分析中介于酚酞和甲基橙终点之间所耗的每mL1mol/L硫酸，相当于碳酸钾138、2mg。

3. Carbonate: every mL1mol/L of sulfuric acid consumed between the end points of phenolphthalein and methyl orange in content analysis is equivalent to 138 and 2mg of potassium carbonate.

4、重金属：取试样670mg，溶于5ml水和5ml稀盐酸试液（TS-117）的混合液中。加热沸，冷却，用水稀释25ml，后过滤。以此作为试样液，按GT-16方法测定。用含20μg铅离子的对照液（溶液A）。

4. Heavy metal: take 670mg sample and dissolve it in 5ml water and 5ml dilute hydrochloric acid test solution (TS-117). Heat to boiling, cool, dilute with water to 25ml, and filter. Take this as the sample solution, and determine according to GT-16 method. 20 for use μ G Reference solution of lead ion (solution A).

5、汞：按CT-22方法测定。标准液和试样液按如下方法制备。

5. Mercury: determined according to CT-22 method. The standard solution and sample solution shall be prepared as follows.

（1）标准液的制备：按GT-22制各贮液和稀释液，使所得溶液每ml中含汞1μg。取该溶液1ml，放入－50ml烧杯，加水20ml.1:4稀硫酸溶液1ml和4%高锰酸钾溶液1ml。用表面皿盖住烧杯，煮沸数秒钟后冷却，备用。

(1) Preparation of standard solution: prepare each storage solution and diluent according to GT-22, so that each ml of the obtained solution contains 1 mercury μ g。 Take 1ml of the solution, put it into a - 50ml beaker, and add 20ml of water 1: 4 Dilute sulfuric acid solution 1ml and 4% potassium permanganate solution 1ml. Cover the beaker with a watch glass, boil it for a few seconds, and then cool it for standby.

（2）试样液的制备：取试样10.0g放入－100ml烧杯，加水15ml使之溶解，加酚酞试液（TS-167）2滴，在不断搅拌下用1:1稀盐酸溶液缓慢中和。加1:稀硫酸溶液1ml和4%高锰酸钾溶液1ml，用表面皿盖住烧杯，煮沸数秒钟后冷却，备用。

(2) Preparation of sample solution: put 10.0g of sample into a 100ml beaker, add 15ml of water to dissolve it, add 2 drops of phenolphthalein test solution (TS-167), and slowly neutralize it with 1:1 dilute hydrochloric acid solution under constant stirring. Add 1ml of 1: dilute sulfuric acid solution and 1ml of 4% potassium permanganate solution, cover the beaker with a watch glass, boil for a few seconds, and then cool down for standby.

以上关于氢氧化钾的质量指标就为大家简单介绍到这里了，如果您还有什么不明的地方就请直接来联系我们http://www.jinhao360.com吧。

The above quality indicators of potassium hydroxide will be briefly introduced here. If you have anything unclear, please contact us directly http://www.jinhao360.com Right.