Cytiva Whatman™ 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.

Catalog Number	Mfr. No.	Diameter (Metric)	Quantity
09-805-1B	Cytiva 10010155	15 mm	500/Pk.
09-927-155	Cytiva 1001020	20 mm	400/Pk.
09-927-223	Cytiva 1001025	25 mm	400/Pk.
09-927-834	Cytiva 1001030	30 mm	400/Pk.
09-805	Cytiva 1001032	32 mm	100/Pk.
09-805A	Cytiva 1001042	42.5 mm	100/Pk.
09-805-342	Cytiva 1001047	47 mm	100/Pk.
09-805B	Cytiva 1001055	55 mm	100/Pk.
09-805C	Cytiva 1001070	70 mm	100/Pk.
09-805-345	Cytiva 1001085	85 mm	100/Pk.
09-805D	Cytiva 1001090	90 mm	100/Pk.
09-805E	Cytiva 1001110	110 mm	100/Pk.
09-805F	Cytiva 1001125	125 mm	100/Pk.
09-805G	Cytiva 1001150	150 mm	100/Pk.
09-805H	Cytiva 1001185	185 mm	100/Pk.
09-805J	Cytiva 1001240	240 mm	100/Pk.
09-805K	Cytiva 1001270	270 mm	100/Pk.
09-805L	Cytiva 1001320	320 mm	100/Pk.
09-805-1G	Cytiva 1001325	25 mm	100/Pk.
09-805P	Cytiva 1001329	30 mm	100/Pk.
09-805-1C	Cytiva 1001385	385 mm	100/Pk.
09-805-1D	Cytiva 1001400	400 mm	100/Pk.
09-805-1A	Cytiva 10016508	10 mm	500/Pk.

Description

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: 13sec./100mL/sq. in.
• Format: Disc
• Particle Retention: >11 μm
• Flow Rate: 57mL/min. (water)
• Grade: Grade 1
• Thickness (Metric): 180 μm

• Basis Weight: 87 g/m²
• Material: Cellulose
• Filtration Speed: 150 sec.
• 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.
• Porosity: Medium