Cytiva Whatman™ Qualitative Filter Paper: Grade 5 Circles - 100 Circles
A standard grade clarifying filter excellent for cloudy suspensions and for water and soil analysis.
These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.
The maximum degree of fine particle filtration in the qualitative range. Capable of retaining the fine precipitates encountered in chemical analysis. Slow flow rate. Excellent clarifying filter for cloudy suspensions and for water and soil analysis.
|Thickness||200 µm (typical)|
|Particle retention||2.5 µm (Particle retention rating at 98% efficiency), in liquid max.|
|Filtration speed||Approx. 1420 s (Herzberg)|
|Ash content||0.06% (Ash is determined by ignition of the cellulose filter at 900 °C in air)|
|Burst strength||0.027 bar Wet Burst; 1.447 bar Dry Burst|
|Basis weight||98 g/m²|
|Airflow rate||94 s/100 ml/in²|
|Tensile strength||55.6 N/15 mm Tensile M/D Dry|
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