Introduction to dialysis bags
At present, there are many brands in the domestic dialysis bag market, the molecular weight replacement is replaced, the brand is replaced, and various situations are emerging one after another, but the ultimate goal is to illegally obtain more profits. But the result is very serious. If the first step is a good sample, if it is a very precious sample, then regret it. Some time ago, there was a teacher who asked why he bought the dialysis bag of MD45 (2000), but he could not do the experimental results, and all the samples leaked. According to the customer's description, I judged that the customer bought the fake goods, and most of them used the dialysis bag of the United States Carbonation (Viskase) MD44 (3500) to impersonate the molecular weight cutoff molecular weight MD45 (2000) of the spectrumlabs. The difference is 1mm in width and can't be seen by the naked eye. In the end, the sample of the teacher's batch was completely wasted.
Therefore, we must have some basic experience before buying a dialysis bag. The following is the mainstream dialysis bag brand on the market that I have compiled according to my own experience for your reference.
1. United States Joint Carbonization (Viskase)
Features: 1 The company produces dry dialysis bags that need to be treated. It is often said that it needs to be activated by boiling. 2 The molecular weight cut-off is only 3500, 7000, 8000-14000. All other manufacturers with molecular weight cut-off are produced. 3 low prices, like md34 (3500), the mainland market price is about 250 yuan / 5 meters. 4 The film is not high in precision and purity, and contains impurities such as sulfides, metal ions, glycerin, etc., which are not suitable for biological experiments requiring high requirements.
2. American Spectroscopic Medicine (spectrumlabs)
Features: 1 The company produces ready-to-use dialysis bags, which are divided into dry and wet type, dry type and glycerin type. The ready-to-use type cannot be cooked at all, and it is bad when cooked. 2 The molecular weight cut-off is the most complete, from 0.1kd to 1000kd; 3 is divided into two kinds of membrane materials: regenerated cellulose RC membrane and cellulose ester CE membrane; 4 membrane precision and purity are the best, high experimental requirements, such as antibody preparation Recommend the brand; 5 price ratio is high, the mainland market price is about 700 yuan / meter.
3. US MFPI (Membrane Filtration Products, Inc.)
Features: 1 The company also produces ready-to-use dialysis bags, which are divided into dry and wet type. The wet type dialysis bag storage solution is different from American Spectroscopic Medicine; 2 The molecular weight cut-off is relatively complete, between the Viskase and Spectrumlabs. Between, from 1kd-50kd; 3 regenerated cellulose membrane, the parameters of the membrane are more comprehensive than the spectrumlabs; 4 the length of the product is relatively small, can be bought in the domestic import, the packaging of other brands is very large; 5 the precision of the membrane And purity is consistent with spectrumlabs, the quality is good.
If you have any questions, please feel free to call.
Beijing Anjiefei Technology Co., Ltd.
phone
QQ: 987633615
China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.anabolicsteriod.com