Qualitative Filter Papers-Grade 6: 3μm

Grade 42: 2.5 μm*(Ashless Grades)

Used for critical gravimetric analysis with the finest particle retention of all
Whatman cellulose filter papers.

Typical analytical precipitates include barium sulfate, metastannic acid, and finely precipitated calcium carbonate.

Grade GF/C: 1.2 μm*

Combines fine particle retention with good flow rate.

The standard filter in many
parts of the world for the collection of suspended solids in potable water and natural
and industrial wastes.

Fast and efficient clarification of aqueous liquids containing
low to medium levels of fine particulates.

Widely used for cell harvesting, liquid scintillation counting, and binding assays where more loading capacity is required.