在一些對(duì)于原料要求比較高的都是需要對(duì)產(chǎn)品的質(zhì)量進(jìn)行檢測(cè)的，今天我們就來(lái)看一下氫氧化鉀在檢測(cè)是的一些注意事項(xiàng)吧。
In some of the higher requirements for raw materials are required to test the quality of products, today we will take a look at some of the precautions in the detection of potassium hydroxide.
1、在測(cè)試的時(shí)候溶液制備的溫度是一定要控制好的，在檢測(cè)的時(shí)候首先需要確定好樣品的采樣單元數(shù)。采樣器一般是需要從袋口的一角斜至袋深位3/4的位置進(jìn)行采樣，然后將選取出來(lái)的的樣品均勻的混合在一起，并且使用四分法縮分的方式確定檢驗(yàn)的樣品數(shù)量。因?yàn)闅溲趸洷旧淼氖怯幸欢ㄎ缘乃栽跍?zhǔn)備樣品的時(shí)候，在空氣當(dāng)中放置的時(shí)間不要太長(zhǎng)了，然后添加進(jìn)取適當(dāng)劑量的水并且不斷的進(jìn)行攪拌，然后再攪拌的同時(shí)需要給溶解做加熱的工作，差不多在微沸5分鐘之后就可以取下冷卻到20℃，然后再將其放入到容量瓶當(dāng)中等到定容過濾之后再吸取一部分到容量瓶中。這個(gè)操作非常關(guān)鍵的一個(gè)部分就是在一定要等著冷卻到20℃時(shí)在進(jìn)行定容，但是有的就直接按照平時(shí)的水溫進(jìn)行定容，那么就會(huì)導(dǎo)致因?yàn)樗疁馗哂?0℃時(shí)測(cè)試出來(lái)的結(jié)果也是不準(zhǔn)確的；而水溫低于20℃的時(shí)候會(huì)發(fā)現(xiàn)測(cè)試的結(jié)果是會(huì)偏低的。那么這樣的定容測(cè)試是會(huì)造成一些誤差出現(xiàn)的

1. During the test, the temperature of solution preparation must be well controlled, and the number of sampling units of the sample should be determined first. The sampler generally needs to sample from a corner of the bag mouth to 3 / 4 of the bag depth, and then mix the selected samples evenly, and use the quartering method to determine the number of samples to be inspected. Because potassium hydroxide itself has a certain water absorption, so when preparing the sample, it should not be placed in the air for too long. Then, add appropriate amount of water and keep stirring. Then, when stirring, it needs to do heating for dissolution. After 5 minutes of micro boiling, it can be removed and cooled to 20 ℃, and then put it into the volume In the volumetric flask, wait until the constant volume filtration, and then draw a part into the volumetric flask. A very important part of this operation is to constant the volume when it must be cooled to 20 ℃. However, some of them will be directly determined according to the usual water temperature, which will lead to inaccurate test results when the water temperature is higher than 20 ℃; and when the water temperature is lower than 20 ℃, the test results will be lower. So this constant volume test will cause some errors
2、還有在測(cè)試的過程當(dāng)中可能會(huì)使用到配制好的四苯硼鈉，因?yàn)樗旧硎菍儆谝环N很不穩(wěn)定狀態(tài)的所以容易出現(xiàn)渾濁的情況。所以如果在使用的時(shí)候發(fā)現(xiàn)有混濁的情況首先需要使用濾紙將其過濾之后再進(jìn)行使用，如果在檢測(cè)的時(shí)候發(fā)現(xiàn)檢測(cè)結(jié)果偏高那么需要使用蒸餾水在進(jìn)行檢測(cè)。
2. In addition, the prepared sodium tetraphenylborate may be used in the test process, because it belongs to a very unstable state, so it is prone to turbidity. Therefore, if the turbidity is found in the use, the filter paper should be used to filter it before use. If the test result is found to be on the high side during the detection, distilled water should be used for detection.
上面介紹的就是氫氧化鉀在檢測(cè)時(shí)候的一些注意事項(xiàng)，在檢測(cè)的時(shí)候一定要確保各項(xiàng)操作的都是正確的，這樣測(cè)試出來(lái)的數(shù)據(jù)也是會(huì)更加的準(zhǔn)確一些的。
The above is the potassium hydroxide in the detection of some precautions, in the detection must ensure that all operations are correct, so that the test data will be more accurate.