Cytiva's Whatman Grade 44 quantitative paper is a thin version of Grade 42 ashless paper. The thinness reduces the overall ash content, making Grade 44 well suited for analyses relying on ash-free dry weight.
- Accurate ash free dry mass measurements
- Fine nominal particle retention rating of 3 µm
- Filtration speed (Herzberg 995 s)
- Typical thickness of 180 µm
Cytiva's business offers other ashless grades with different particle retention ratings, as well as hardened ashless grades to ensure accurate measurement during analyses of samples that are strongly acidic/alkali.
Fast gravimetric analysis of fine particles. Gravimetric analysis can be time-consuming when filtration of fine particles is required. Because of its reduced thickness, Grade 44 ashless filter paper from Cytiva provides faster filtration of fine particles when compared with thicker papers of similar retention rating, such as Whatman Grade 42 paper.
- Catalog No:
- 28482-070
- 28482-065
- 89233-652
- 70240-054
- 28482-043
- 28297-334
- 28482-021
- Thickness:
- 176 µm (nominal)
- 176 µm (nominal)
- 176 µm (nominal)
- 176 µm (nominal)
- 176 µm (nominal)
- 176 µm (nominal)
- 176 µm (nominal)
- Particle Retention:
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- 3 µm (Particle retention rating at 98% efficiency), in liquid max.
- Filtration Speed:
- 995 s (Herzberg)
- 995 s (Herzberg)
- 995 s (Herzberg)
- 995 s (Herzberg)
- 995 s (Herzberg)
- 995 s (Herzberg)
- 995 s (Herzberg)
- Airflow Rate:
- 56 s/100 ml/in²
- 56 s/100 ml/in²
- 56 s/100 ml/in²
- 56 s/100 ml/in²
- 56 s/100 ml/in²
- 56 s/100 ml/in²
- 56 s/100 ml/in²
- Basis Weight:
- 80 g/m²
- 80 g/m²
- 80 g/m²
- 80 g/m²
- 80 g/m²
- 80 g/m²
- 80 g/m²
- Burst Strength:
- 0.027 bar, wet burst; 3.033 bar, dry burst
- 0.027 bar, wet burst; 3.033 bar, dry burst
- 0.027 bar, wet burst; 3.033 bar, dry burst
- 0.027 bar, wet burst; 3.033 bar, dry burst
- 0.027 bar, wet burst; 3.033 bar, dry burst
- 0.027 bar, wet burst; 3.033 bar, dry burst
- 0.027 bar, wet burst; 3.033 bar, dry burst
- Flow Rate:
- Slow to medium
- Slow to medium
- Slow to medium
- Slow to medium
- Slow to medium
- Slow to medium
- Slow to medium
- Recommended Flow Rate:
- 11 ml/min (Water)
- 11 ml/min (Water)
- 11 ml/min (Water)
- 11 ml/min (Water)
- 11 ml/min (Water)
- 11 ml/min (Water)
- 11 ml/min (Water)
- Tensile Strength:
- 39.4 N/15 mm, Tensile M/D Dry
- 39.4 N/15 mm, Tensile M/D Dry
- 39.4 N/15 mm, Tensile M/D Dry
- 39.4 N/15 mm, Tensile M/D Dry
- 39.4 N/15 mm, Tensile M/D Dry
- 39.4 N/15 mm, Tensile M/D Dry
- 39.4 N/15 mm, Tensile M/D Dry
: Cytiva
: VWR International
: Thermo Fisher Scientific
: Thermo Fisher Scientific
: VWR International
: VWR International
: VWR International