2- Qualitative Filter Paper
Qualitative filter paper is used in qualitative
analytical techniques to determine materials.
There are different grades of qualitative filter
paper according to different pore size. There are
total 13 different grades of qualitative filter paper.
The largest pore size is grade 4; the smallest pore
size is grade 602 h; the most commonly used
grades are grade 1 to grade 4.
Technical specification :
DOP Retention : 85-87gsm
Retention :
Medium crystalline
Filter speed :
Medium fast
GSM :
90 (approx) pH
Resolution :
Very low
Wet strength :
High
Ash contents :
< 0.1%