Grade 44 Ashless Filter Paper, Thin

GE’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

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 GE provides faster filtration of fine particles when compared with thicker papers of similar retention rating, such as Whatman Grade 42 paper.

Grade 44: 3 µm

Specifications:

• Grade: Grade 44
• Format: Circles
• Type: Ashless
• Typical Particle Retention in Liquid: 3 µm
• Typical Water Flow Rate (ml/min) for 9cm diameter: 1
• Nominal Thickness: 176 µm
• Nominal Basis Weight: 80 g/m²
• Nominal Air Flow Rate: 56s/100mL/in²
• Nominal Ash Content: 0.007%
• Material: High-quality cotton linters
• Alpha Cellulose Content Min.: ≥98%
• Typical Trace Element Levels: Aluminium 2.5 µg/g, Antimony <0.5 µg/g, Arsenic <0.5 µg/g, Barium <0.5 µg/g, Boron <1 µg/g, Calcium 8.3 µg/g, Chromium 1.5 µg/g, Copper 2 µg/g, Iron 12 µg/g, Lead <0.5 µg/g, Magnesium 4 µg/g, Manganese <0.5 µg/g, Mercury <0.5 µg/g, Potassium 2.3 µg/g, Silicon 6.2 µg/g, Sodium 16.8 µg/g, Zinc 64.5 µg/g

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