Quantitative Filter Paper, Grade 540, 8um, 70mm, Hardened Ashless, Nonsterile, 100/Pk
GVS SKU: FP070DF540QANC01

Featuring an acid-hardened, ashless cellulose medium, this Grade 540 quantitative filter paper delivers a nominal particle retention of 8 microns with a medium flow rate. The 70mm circles are supplied 100 per box and provide high wet strength and high chemical resistance to strong acids and alkalis, making them suitable for critical gravimetric work. The hard, tough surface resists tearing during filtration and allows precipitates to be scraped cleanly from the paper.

Key Filter Paper Media Characteristics

• Hardened ashless cellulose: acid-treated to reduce ash to an extremely low level for accurate gravimetric and quantitative analysis.
• Nominal particle retention of 8um with a medium flow rate, balancing throughput and clarity.
• High wet strength from acid hardening, so the paper withstands wet handling and precipitate recovery by scraping.
• High chemical resistance to strong acid and alkali suspensions.
• Hard, pure surface that minimizes loose fibers and supports critical analytical filtration operations.

Key Construction Characteristics

• Format: 70mm diameter circles (discs).
• Grade: Quantitative, hardened ashless (Grade 540).
• Pack: 100 discs per box.
• Sterility: Nonsterile.
• Wettability: hydrophilic cellulose.

This filter paper maintains consistent retention and flow across repeated analytical runs, supporting reproducible gravimetric results. Its high purity and low ash content help preserve sample integrity when filtering metals in acidic or alkaline solutions and collecting precipitated hydroxides.

Color

White

Diameter

70mm

Flow Speed

Medium

Grade

Quantitative, Hardened Ashless (Grade 540)

Hardened (Yes/ No)

Yes

Material

Cellulose

Mesh Format

Circle

Nominal Ash Content (%)

0.006

Nominal Basis Weight (g/ m²)

85

Nominal Thickness (µm)

160

Pack Count

100

Particle Retention

8 µm

Pore Size (µm)

8

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

Whatman Equivalent

Grade 540

• Gravimetric Analysis Provides low ash content and high wet strength for accurate quantitative determination of precipitates.
• Metals Analysis in Acid or Alkali Solutions Withstands strong acidic and alkaline samples during filtration of dissolved metals.
• Hydroxide Collection Captures hydroxides precipitated by strong alkalis for downstream gravimetric measurement.
• Buchner Funnel Filtration Suitable for vacuum filtration where precipitate recovery from the paper surface is required.
• Analytical Clarification Clarifies acidic or alkaline solutions prior to instrumental analysis with minimal contamination.