Quantitative Filter Paper, Hardened Ashless, Grade 541, Fast, 47mm, 100/Pk
GVS SKU: FP047DF541QANC01

Featuring acid-hardened cellulose fiber media with extremely low ash content, this Grade 541 quantitative filter paper delivers fast filtration of coarse particles and gelatinous precipitates. Each 47mm circle provides a nominal particle retention of 20 to 25 microns and a coarse, fast-flowing structure suited to demanding analytical work. The hardened surface gives high wet strength and broad chemical resistance, making it appropriate for strongly acidic and alkaline suspensions encountered in gravimetric analysis. With a controlled ash content below 0.006 percent, the paper introduces virtually no contaminants when ignited alongside the sample.

Key Filter Paper Media Characteristics

• Hardened ashless cellulose acid-treated to reach a nominal ash content below 0.006 percent for ignition-based determinations.
• Coarse, fast filtration with a nominal particle retention of 20 to 25 microns for rapid processing of heavily loaded samples.
• High wet strength resists tearing when saturated, simplifying transfer of collected precipitates from funnel to crucible.
• High chemical resistance supports use with strong acid and alkali suspensions.
• Hydrophilic structure wets readily with aqueous samples for consistent flow.

Key Construction Characteristics

• Material: hardened ashless cellulose fiber.
• Format: 47mm diameter circles.
• Grade: DF541, equivalent to Whatman Grade 541.
• Nominal basis weight: 82 g/m squared.
• Packaging: 100 circles per pack, nonsterile.

This filter paper provides documented, low-residue performance for quantitative methods where filter mass affects the final measurement. The combination of fast flow and high wet strength maintains throughput while preserving sample integrity during transfer. Consistent grade specifications support reliable, repeatable results across analytical batches.

Color

White

Diameter

47mm

Flow Speed

Fast

Grade

DF541

Hardened (Yes/ No)

Yes

Material

Hardened Ashless Cellulose Fiber

Nominal Ash Content (%)

<0.006%

Nominal Basis Weight (g/ m²)

82

Pack Count

100

Particle Retention

22um

Pore Size (µm)

20.0-25.0

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

Whatman Equivalent

541

• Gravimetric Analysis Provides ultra-low ash residue for quantitative determinations where the filter is ignited alongside the collected precipitate.
• Coarse Precipitate Filtration Rapidly separates coarse particles and gelatinous precipitates such as metal hydroxides during analytical procedures.
• Strong Acid and Alkali Filtration Acid-hardened structure withstands aggressive acidic and alkaline suspensions while maintaining wet strength.
• Food and Feed Analysis Used for determinations such as fiber content in animal foodstuffs and gelatin in milk and cream.
• Cement and Coal Testing Supports quantification of chloride in cement and chloride and phosphorous in coal and coke.
• Buchner Funnel Filtration High wet strength makes the hardened paper well suited to vacuum filtration in critical analytical operations.