欧美色亚洲色,欧美日韩国产亚洲成人自拍,中文字幕人妻一区二区在线视频侦探,熟女一区二区少妇

你好,歡迎訪問濟南金昊化工有限公司!

專注品質(zhì),信賴服務(wù)

我們用心做產(chǎn)品服務(wù)

咨詢熱線:

13655318786

常見問題

您現(xiàn)在的位置: 網(wǎng)站首頁>>新聞中心>>常見問題檢測無水亞硫酸鈉雜質(zhì)的方法是什么

檢測無水亞硫酸鈉雜質(zhì)的方法是什么

來源:http://m9660.cn/ 日期:2022-04-25 發(fā)布人: 瀏覽次數(shù):0
檢測無水亞硫酸鈉雜質(zhì)的方法是什么?無水亞硫酸鈉中的雜質(zhì)指的是無水亞硫酸鈉含有的鐵鹽和重金屬等雜質(zhì),雜質(zhì)多,無水亞硫酸鈉質(zhì)量等級一般;雜質(zhì)少說明純度高,性能穩(wěn)定,所以無水亞硫酸鈉的提純方法很重要。
What is the method for detecting anhydrous sodium sulfite impurities? Impurities in anhydrous sodium sulfite refer to impurities such as iron salts and heavy metals contained in anhydrous sodium sulfite. There are many impurities, and the quality grade of anhydrous sodium sulfite is general; Less impurities means high purity and stable performance, so the purification method of anhydrous sodium sulfite is very important.
買到的無水亞硫酸鈉后,需對其雜質(zhì)檢測,雜質(zhì)符合自身使用要求,方可投入,獲取更多的經(jīng)濟效益,無水亞硫酸鈉中的雜質(zhì)的檢測方法如下:
After the anhydrous sodium sulfite is purchased, its impurities need to be detected. The impurities can be put into production only if they meet their own use requirements, so as to obtain more economic benefits. The detection methods of impurities in anhydrous sodium sulfite are as follows:
1、無水亞硫酸鈉水溶液(1→10)顯堿性,并且溶液顯亞硫酸鹽的鑒別反應(yīng)。
1. Anhydrous sodium sulfite aqueous solution (1 → 10) is alkaline, and the solution shows the identification reaction of sulfite.
2、無水亞硫酸鈉水溶液顯鈉鹽的鑒別反應(yīng)。
2. Identification reaction of sodium salt in anhydrous sodium sulfite aqueous solution.
檢測:
testing:
溶液的澄清度與顏色
Clarity and color of solution
取無水亞硫酸鈉水溶液1.0g,加水20ml使溶解,溶液透明無色。硫代硫酸鹽取本品1.0g,加水15ml溶解后,加稀鹽酸5ml,搖勻,靜置5分鐘,不得產(chǎn)生渾濁。
Take 1.0g anhydrous sodium sulfite aqueous solution and add 20ml water to dissolve it. The solution is transparent and colorless. Thiosulfate take 1.0g of this product, dissolve it with 15ml of water, add 5ml of dilute hydrochloric acid, shake it well, and let it stand for 5 minutes without turbidity.
重金屬雜質(zhì)檢測
Heavy metal impurity detection
取無水亞硫酸鈉水溶液1.0g,依法檢查。含重金屬不得過百萬分之二十。 砷鹽 取本品0.5g,加水10ml溶解后,加硫酸1ml,置砂浴上蒸白煙冒出,放冷,加水21ml與鹽酸5ml,依法檢查,應(yīng)符合規(guī)定(0.0004%)。
Take 1.0g anhydrous sodium sulfite aqueous solution and check it according to law. The content of heavy metals shall not exceed 20 parts per million. Arsenic salt take 0.5g of this product, add 10ml of water to dissolve it, add 1ml of sulfuric acid, steam it in a sand bath until white smoke comes out, cool it, add 21ml of water and 5ml of hydrochloric acid, and check it according to law. It should meet the requirements (0.0004%).
含量測定:取無水亞硫酸鈉水溶液約0.20g,加碘滴定液(0.05mol/L)50ml,密塞,振搖使溶解,在暗處放置5分鐘.用硫代硫酸鈉滴定液(0.1mol/L)滴定,近終點時,加淀粉指示液1ml,繼續(xù)滴定藍色消失,并將滴定的結(jié)果用空白試驗校正。每1ml碘滴定液(0.05mol/L)相當于6.302mg的亞硫酸鈉。
Content determination: take about 0.20g of anhydrous sodium sulfite aqueous solution, 50ml of iodine titrant (0.05mol / L), close it, shake it to dissolve, and place it in the dark for 5 minutes. Titrate with sodium thiosulfate titrant (0.1mol / L). When it is close to the end point, add 1ml of starch indicator solution, continue titration until the blue color disappears, and correct the titration result with blank test. Every 1ml of iodine titrant (0.05mol/l) is equivalent to 6.302mg of sodium sulfite.
無水亞硫酸鈉作用大,用途廣,作為還原劑,在紡織,造紙等領(lǐng)域的成就都比較好。
Anhydrous sodium sulfite has great function and wide application. As a reducing agent, it has made good achievements in textile, papermaking and other fields.
以上就是為大家介紹的有關(guān)過硫酸鈉http://m9660.cn的詳細的介紹,希望對您有所幫助.如果您有什么疑問的話,歡迎聯(lián)系我們.我們將以的態(tài)度,為您提供服務(wù)
The above is about sodium persulfate http://m9660.cn I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service

相關(guān)新聞
欧美日韩午夜在线免费观看视频| 伊人久久老色奶| 亚洲AV无码AV在线| 精品字幕91| 日韩精品乱伦无码一区二区| 日韩BT无码一区| 黄污无码毛片| 男人天堂a蜜桃av| 亚洲永久精品视频网站| 福利试看小视频| 亚州天堂免费在线| 亚欧在线| jiujiu九九九级7就久| 91人人妻人人藻人人爽人人精品| 新色AAA肉| 日本一区二区偷拍视频| 成人亚洲区| 日美熟妇| 亚洲三级久久网站| 亚洲AV无码一区二区三区观看| 精品久久一区二区三区_| 揉着奶头狂揉60分钟| 操美女逼网站| 日本久久精品在线观看| 中文字幕伊人|日韩 | 制服丝袜一中文字幕| 亚洲 日韩 成人文学| 老湿69久久| 国产精品女国产| 麻豆国产久久cc在线| 麻豆久久一区二区三在| 精品一区卡二区不卡| 无有码亚洲| 女嗯嗯啊视频| eeuss鲁丝片av无码| 久久久久久久午夜影院| 美女光溜溜的视频网站在线看| 一区二区三区四区极品| 天天日天天射射射射| 月激情综合深爱| 在线看美女搞黄91|