Cytiva Filter Circles, Qualitative, Grade 1
Cytiva Filter Circles, Qualitative, Grade 1


Most widely used 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. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot) and calcium carbonate, in agriculture for soil analysis and seed testing procedures, in the food industry for numerous routine techniques to separate solid foodstuffs from associated liquid or extracting liquid and is widely used in education for teaching simple qualitative analytical separations. In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and colour formation quantified by optical reflectance.
Particle retention:11 µm
Filtration speed:150 s
Weight:88 g / m2
Thickness:0.18 mm
Ash:0.06 %
Filter type:filter circle
TypeHöhe
mm
Filtration time
[s]
Order No.PU Manuf. Prod. No. 
Grade 110.0020.005428531500-1001-6508 
Grade 115.0013.005428527500+1001-0155 
Grade 142.5013.005421876100+1001-042 
Grade 147.0013.005421877100-1001-047 
Grade 155.0013.005421878100+1001-055 
Grade 170.0013.005421879100+1001-070 
Grade 185.0013.005421880100-1001-085 
Grade 190.0013.005421881100+1001-090 
Grade 1110.0013.005421882100+1001-110 
Grade 1125.0013.005421883100+1001-125 
Grade 1150.0013.005421884100+1001-150 
Grade 1185.0013.005421885100+1001-185 
Grade 1240.0013.005421886100-1001-240 
Grade 1270.0013.005428528100-1001-270 
Grade 1320.0013.005428529100-1001-320 
Grade 1400.0013.005428530100-1001-400