Quantitative Filter Paper, Grade 541, Fast, 20-25um, 125mm Circles, Hardened Ashless, 100/Pk
GVS SKU: FP125DF541QANC01

Featuring acid-hardened ashless cellulose, this Grade 541 quantitative filter paper delivers fast analytical filtration with a 20.0-25.0um nominal particle retention range across 125mm circles. Grade 541 filter paper is acid-hardened to provide high wet-strength and high chemical resistance with extremely low ash content, making it well suited to gravimetric procedures involving strong acid and alkali suspensions. The medium measures 190um in thickness with a basis weight of approximately 80 g/m2 and is supplied 100 discs per pack.

Key Cellulose Media Characteristics

• Hardened ashless cellulose reduces ash to an extremely low level for ignition-based quantitative determinations.
• Fast filtration speed with a 20.0-25.0um nominal particle retention range captures coarse particles and gelatinous precipitates while maintaining rapid throughput.
• High wet-strength resists tearing when saturated, simplifying transfer of collected precipitates.
• High chemical resistance supports filtration of strongly acidic and alkali solutions.
• Hydrophilic structure wets readily for consistent aqueous filtration.

Key Construction Characteristics

• Format: 125mm diameter circles (discs).
• Media thickness: 190um.
• Grade: Quantitative, Grade 541, hardened ashless.
• Sterility: Nonsterile.
• Pack: 100 discs per pack.

This filter paper provides documented low residue and consistent physical properties for ignition-based analytical procedures where filter mass affects results. Its hardened surface maintains integrity during precipitate transfer, protecting sample integrity from funnel to crucible. Reliable performance across lots supports reproducible quantitative determinations.

Color

White

Diameter

125mm

Flow Speed

Fast

Grade

Quantitative, Grade 541

Hardened (Yes/ No)

Yes

Material

Cellulose

Membrane Thickness (µm)

190

Mesh Format

Circle

Nominal Ash Content (%)

0.006

Nominal Basis Weight (g/ m²)

80

Nominal Thickness (µm)

190

Pack Count

100

Particle Retention

20-25

Pore Size (µm)

20.0-25.0

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 541

• Gravimetric Analysis Retains coarse particles and gelatinous precipitates in strong acid or alkali solutions for ignition-based quantitative determinations.
• Chloride Gravimetry Collects silver chloride precipitate for mass-based chloride determination in water quality and process control.
• Sulfate Gravimetry Retains barium sulfate precipitate for ignition-based sulfate quantification in water and industrial samples.
• Cement and Coal Testing Supports quantification of chloride in cement as well as chloride and phosphorus in coal and coke.
• Foodstuff Analysis Serves as an animal foodstuff filter for determining fiber content and gelatin content in milk and cream.
• Metallurgical Determinations Captures coarse metal precipitates for fast filtration ahead of gravimetric measurement.