GE Whatman Qualitative Grade 2 Filter Papers are used in qualitative analytical techniques to determine and identify materials. Pre-pleated qualitative filters are also available. They offer improved flow rate and increased loading capacity compared to the equivalent flat filters.
Maximum ash is 0.06%. Grade 1 papers are ideal for general use. They have 11 µm particle retention and medium flow rate.
Grade 2 papers are more retentive than Grade 1. They can be used for general filtration, plant growth trials and soil testing.
Grade 3 papers are twice the thickness of Grade 1 for excellent loading capacity and 6µm retention. They are highly absorbent and have exceptional wet strength.
Grade 4 papers offer very fast filtering with excellent retention of coarse particles (20-25 25 µm retention).