400-878-5661

 中文  EN 
新闻资讯
your current location : home >> News >> Technical information


Zhuorui Jianyi Scientific Instrument (Shanghai) Co., Ltd

Tel: 400-878-5661

Website: en.yrkj17.com

Email address: tlgshn@163.com

Address: No. 2, Lane 99, Baota Road, Jiading District, Shanghai

contact us

Instrument microbial membrane filter how to clean it?

2020-11-20 09:50:18
time

Microbial membrane filter is a dual-purpose membrane filter for sterility test. The two methods are universal. The design is reasonable, the filter part is made of glass, the chemical performance is stable, the sealing degree is strong, the external pollution is effectively prevented, and the success rate of bacteria detection is ensured.

  How to clean the instrument microbial membrane filter? Today, I'd like to introduce you to the editor of zhuorei Scientific Instrument Co., Ltd., hoping to help you.

  Microbial membrane filters need to be kept clean all the time. Should develop the habit of cleaning the microbial membrane filter after use. It is not only easy to clean, but also easy to find out the way to deal with the residue because of the understanding of the causes and properties of the residue. For example, alkaline residue and acidic residue are treated with acid and alkali respectively, and the residue may be washed away. After a long time, it will bring a lot of difficulties to wash.

  A simple way to wash the microbial membrane filter is to use a brush and detergent. Sometimes in the soap powder mixed with some decontamination powder or diatomite, washing effect is better. After washing, clean the membrane filter with clean water. It should be noted that when washing, do not use a bald brush, and do not use too much force, otherwise the microbial membrane filter will be punctured. Tar like substance and carbonization residue can't be washed off with detergent powder, soap, strong acid or strong alkali solution. At this time, chromic acid solution is needed.

  The preparation method of chromic acid lotion is as follows: in a 250ml beaker, dissolve 5g sodium dichromate in 5ml water, and then slowly add 100ml concentrated sulfuric acid under stirring. In the process of adding sulfuric acid, the temperature of the mixture will rise to 70 ~ 80 ℃. When the mixture is cooled to about 40 ℃, pour it into a dry and tightly grinded reagent bottle.

  Chromic acid lotion is reddish brown. It will be invalid when it turns green after long-term use. Chromic acid lotion is a kind of strong acid and oxidant, which is corrosive and should be used safely.

  Before using chromic acid washing solution, the dirt on the microbial membrane filter, especially the reducing substances, should be cleaned as far as possible. Pour out the water in the microbial membrane filter as much as possible, and then slowly pour in the washing liquid, so that the washing liquid can fully wet the unwashed place. After a few minutes, continuously rotate the microbial membrane filter, so that the washing liquid can fully infiltrate the place with residue, and then pour the washing liquid back into the original bottle. Then add a small amount of water, shake and pour the washing liquid into the waste liquid tank. Then rinse the membrane filter with clean water. If the waste is carbonized residue, add a small amount of washing solution or concentrated nitric acid, soak the residue for a few minutes, and then heat the place evenly with a small flame until the washing solution begins to bubble. Then wash as above.

  Due to the toxicity of chromium, appropriate solvents or detergents are often used instead of chromic acid in laboratory.

  Clean and dry the glass microbial membrane filter with cock and grinding mouth, and pad paper between cock and grinding mouth.

  Since its establishment, zhuorei scientific instrument (Shanghai) Co., Ltd. has established a long-term stable supply and marketing relationship with some large domestic enterprises, such as Shuanghui, Huaying, Zhongpin, Pingmei, Sanquan, Yisai, Anjing, Baixiang food, Kangshifu, jinmailang, Yili, Mengniu, etc. The company's "Yirui brand" has complete specifications and a wide variety of instruments, which can meet the different needs of experiments, tests and analysis in various industries. When choosing a company, you must find a manufacturer with guaranteed quality. Our company is a company with many years of experience, and the quality is guaranteed in this respect. So if you need to, you may as well contact us to understand. I believe it must be a good choice.


label

Recently viewed:


Address: No. 2, Lane 99, Baota Road, Jiading District, Shanghai


Tel: 400-878-5661


Website: www.yrkj17.com


Email address: tlgshn@163.com



(scan)
(scan)
(scan)


EN | CN | Sitemap | RSS | XML
Copyright © Zorui Artisan Scientific Instruments (Shanghai) Co All rights reserved record number:Shanghai ICP No.19038076 Technical Support:tuozhiqi