Potassium hydroxide is not unfamiliar to everyone, so what is its quality index? Next, follow Xiaobian to have a brief understanding.

　　1、水不溶物：5%試樣水溶液應(yīng)無(wú)色透明。

　　1. Water insoluble substance: 5% sample solution should be colorless and transparent.

　　2、鉛：取試樣1g溶于5ml水和11ml稀鹽酸試液的混合液中，冷卻。以此作為試樣液按GT-18方法測(cè)定。對(duì)照液中的鉛離子量取10μg。

　　2. Lead: Take 1g sample and dissolve it in a mixture of 5ml water and 11ml dilute hydrochloric acid, then cool it. The sample solution was determined by GT-18 method. The amount of lead ion in the control solution was 10 ug.

　　3、碳酸鹽：在含量分析中介于酚酞和甲基橙終點(diǎn)之間所耗的每mL 1mol/L硫酸，相當(dāng)于碳酸鉀138、2mg。

　　3. Carbonate: In content analysis, 1 mol/L sulfuric acid per mL, equivalent to 138 and 2 mg of potassium carbonate, is consumed between the end point of phenolphthalein and methyl orange.

　　4、重金屬：取試樣670mg，溶于5ml水和5ml稀鹽酸試液（TS-117）的混合液中。加熱沸，冷卻，用水稀釋25ml，后過(guò)濾。以此作為試樣液，按GT-16方法測(cè)定。用含20μg鉛離子的對(duì)照液（溶液A）。

　　4. Heavy metals: sample 670 mg, dissolved in 5 ml water and 5 ml dilute hydrochloric acid test solution (TS-117). Heat to boil, cool, dilute to 25 ml with water, and then filter. The sample solution was determined by GT-16 method. The control solution containing 20 mg lead ion (solution A) was used.

　　5、汞：按CT-22方法測(cè)定。標(biāo)準(zhǔn)液和試樣液按如下方法制備。

　　5. Mercury: determined by CT-22 method. Standard solution and sample solution are prepared in the following way.

　　（1）標(biāo)準(zhǔn)液的制備：按GT-22制各貯液和稀釋液，使所得溶液每ml中含汞1μg。取該溶液1ml，放入－50ml燒杯，加水20ml.1:4稀硫酸溶液1ml和4%高錳酸鉀溶液1ml。用表面皿蓋住燒杯，煮沸數(shù)秒鐘后冷卻，備用。

　　(1) Preparation of standard solution: According to GT-22, each storage liquid and diluent were prepared, so that the obtained solution contained 1 ug of mercury per ml. Take 1 ml of the solution and put it into a beaker of - 50 ml. Add 20 ml.1:4 dilute sulfuric acid solution 1 ml and 4% potassium permanganate solution 1 ml. Cover the beaker with a surface dish and boil for a few seconds before cooling. Set aside.

　　（2）試樣液的制備：取試樣10.0g放入－100ml燒杯，加水15ml使之溶解，加酚酞試液（TS-167）2滴，在不斷攪拌下用1:1稀鹽酸溶液緩慢中和。加1:稀硫酸溶液1ml和4%高錳酸鉀溶液1ml，用表面皿蓋住燒杯，煮沸數(shù)秒鐘后冷卻，備用。

　　(2) Preparation of sample solution: 10.0 g of sample was put into - 100 ml beaker, 15 ml of water was added to dissolve the sample, 2 drops of TS-167 was added, and 1:1 dilute hydrochloric acid solution was used to neutralize the sample slowly under continuous stirring. Add 1:1 dilute sulfuric acid solution 1 ml and 4% potassium permanganate solution 1 ml. Cover the beaker with a surface dish, boil for a few seconds, then cool down. Set aside.

　　以上關(guān)于氫氧化鉀的質(zhì)量指標(biāo)就為大家簡(jiǎn)單介紹到這里了，如果您還有其它的見(jiàn)解的話，歡迎隨時(shí)來(lái)電咨詢。

　　The above quality indicators of potassium hydroxide are briefly introduced here. If you have any other opinions, please feel free to call for advice.