Whatman Filter Paper Grade 3

Whatman filter paper Grade 3 is a specific type of filter paper that is used for. These filter papers contain cellulose fibers, and people manufacture them from high-quality cotton linters (First, we have to treat them to increase the amount of alpha-cellulose. Therefore, Whatman filter paper contains a high percentage of alpha cellulose and that is an advantage for high quality and consistency. There are different grades of these filter papers. We can divide them into grades according to particle retention, thickness, and weight.
The is a difference between Whatman filter paper Grade 3 and a normal filter paper, Whatman filter paper is a specific type of filter paper that is used for qualitative analysis. We can use it for qualitative chemical analysis. More importantly, the ash content of these filter papers is about 0.13%. Normal filter paper is a semi-permeable barrier that we use to separate components in a liquid flow or an airflow. We can use them for both qualitative (qualitative means ash that can be produced after ashing is not more than 0.13%.) and quantitative (in the quantitative chemical analysis. The amount of ash this can produce after the ashing process is not more than 0.0009% therefore, we can consider it as an ashless filter paper and we can ignore the amount of ash it produces in an analysis).
During chemical analysis, a proper grade of filter paper has to be selected according to the purpose or application. In addition, the ash content of these filter papers ranges from 0.0009% (quantitative) to 0.13% (qualitative). Whatman filter paper has a pore size of 20 to 25 micron particle size retention and they come in different grades namely: grade 1, grade 2, grade 3, grade 4, grade 40 ashless, and grade 41 ashless.