Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Sheets are widely used standard grade filter paper for routine applications with medium retention and flow rates.
These cellulose filters are used in qualitative analytical techniques to determine and identify materials and for clarifying liquids.
Particle Retention: >11μm
Filtration speed: ASTM™, 40 sec.; Herzberg, 150 sec.
Separates precipitates such as lead sulfate, calcium oxalate (hot) and calcium carbonate
Used for soil analysis and seed testing procedures in the agricultural industry
Used to separate solid foodstuffs from associated liquid or extract liquid in the food industry
Atmospheric dust is collected from airflow and the stain-intensity measured
Impregnated with a chromogenic reagent and color formation quantified by optical reflectance for gas detection