Whatman™ FIS09-805E Qualitative Filter Paper: Grade 1 Circles

Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Circles are widely used standard grade filter papers 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
• Porosity: medium
• Filtration speed: ASTM™, 40 sec.; Herzberg, 150 sec.
• Surface: smooth
• 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

Specifications:

• Airflow Rate: 13 sec./100 mL/sq. in.
• Basis Weight: 87 g/m2
• Description: Grade 1 Qualitative Filter Paper Standard Grade, circle, 110 mm
• Format: Disc
• Material: Cellulose
• Particle Retention: >11 μm
• Filtration Speed: 150 sec.
• Flow Rate: 57 mL/min. (water)
• For Use With (Application): A widely used standard grade filter paper for routine applications with medium retention and flow rate. It covers a wide range of laboratory applications and is frequently used for clarifying liquids.
• Grade: Grade 1
• Porosity: Medium
• Quantity: 100/Pk.
• Thickness (Metric): 180 μm
• Type: Qualitative Filter Paper
• Diameter (English): 4.37 in.
• Diameter (Metric): 110 mm
• Unit Size: Pack

Note: Picture is for illustration only. The actual product might be different