The Selection of Chromatographic Filter Paper

Chromatographic filter paper can be divided into three types: fast, medium, and slow. It is based on its different texture, thickness, and the speed of solvent unfolding on the filter paper. Hawach provides Qualitative Filter Paper Disc Grade: BIO-1, Quantitative Ashless Filter Paper Grade: BIO-41, Quantitative Laboratory Filter Paper Grade: BIO-42, Quantitative Cellulose Filter Paper Grade: BIO-44, and other filter papers for your choice.

When selecting the filter paper, people should combine the Rf value of the separated object. For the compounds with slight differences in Rf values, slow filter paper can be used to separate the compounds clearly because using the fast filter paper will cause the inseparable weight of the separation zone. For the compounds with large differences in Rf value, medium or fast filter paper is suitable.

The thickness of the filter paper, it should be determined according to the purpose of separation analysis. The thin chromatography filter paper is used for general qualitative analysis, and the thick chromatography filter paper is used for quantitative analysis or preparation.

When the chromatographic filter paper is applied to the experiments, it should be treated by different methods, such as immersed in a non-polar solvent, insoluble inorganic, salt solution or non-volatile solvent, and so on. In a way like this, the filter paper can be buffered separately for reverse-phase chromatography and separation.

How to Purchase Filter Papers from Hawach?

As mentioned before, Hawach Scientific is a dedicated manufacturer that focuses on R&D, manufacture, and marketing of micro-porous filtration and laboratory consumables products under the ISO9001 quality management system.

Today we’d like to introduce you to how to purchase filter paper from Hawach:

Firstly, you should know whether your filter paper is Qualitative filter papers or Quantitative filter papers, this is very important owing to different functions and different prices.

Secondly, you should make sure about the size of your filter paper, is it around disc or square sheet, or Roll type? For the regular size of the disc, we have 55mm, 70mm, 90mm, 110mm, 125mm, 150mm, 180mm, and 185mm, if need other sizes, please contact us and discuss more details. For square sheet the most common size is 60*60cm, if you need other sizes, also need to be checked with our sales department; For roll type, we only have a width size of 123cm, one Roll is 100kgs, and it is a qualitative filter paper.

Thirdly, you should confirm the pore size or filtration speed, such as FAST(20-25um), Medium(8-11um), and Slow(2.5-3um).

At last, once you confirm the quantity, please send mail to info@hawach.com, then when the sales know your filter papers above details, it’s easy for them to send you the best price and lead time.