Quantitative Hardened Ashless Filter Paper, Grade 540, 8um, 110mm, 100/Pk
GVS SKU: FP110DF540QANC01

Featuring an acid-hardened, high-purity cellulose medium, this Grade 540 quantitative filter paper delivers medium particle retention with a typical 8 micron cutoff and a medium flow rate. The 110mm circles are produced from high-quality cotton linters and acid-washed under stringently controlled conditions, reducing ash content to an extremely low level so no contaminants are introduced during gravimetric work. The tough, hardened surface withstands strong acid and alkali suspensions and allows precipitates to be scraped directly from the paper.

Key Filter Paper Media Characteristics

• Hardened ashless cellulose: acid hardening reduces ash content to an extremely low level for quantitative and gravimetric analysis.
• Medium retention and flow: general-purpose grade with a typical 8 micron particle retention and a medium filtration speed.
• High wet strength: the hardened texture resists tearing during filtration and supports recovery of retained precipitates.
• High chemical resistance: withstands strongly acidic and alkaline solutions for demanding analytical procedures.
• Hydrophilic structure: wets readily for consistent, reproducible filtration of aqueous samples.

Key Construction Characteristics

• Format: 110mm diameter circles supplied 100 per pack.
• Material: high-purity cellulose from cotton linters, hardened and ashless.
• Grade: Grade 540, quantitative, nonsterile.

This filter paper provides reliable, reproducible performance in critical analytical filtration operations where low ash and high purity protect sample integrity. Its mechanical strength and chemical resistance make it well suited to gravimetric analysis of metals in acidic or alkaline solutions and to collecting hydroxides after precipitation by strong alkalis.

Color

White

Diameter

110mm

Flow Speed

Medium

Grade

540

Hardened (Yes/ No)

Yes

Material

Cellulose (Cotton Linters)

Mesh Format

Circle

Nominal Ash Content (%)

<0.006

Nominal Basis Weight (g/ m²)

85

Nominal Thickness (µm)

160

Pack Count

100

Particle Retention

8 um

Pore Size (µm)

7.0-12.0

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

1540-110

• Gravimetric Analysis Hardened ashless construction and very low ash content support accurate gravimetric determination of metals in acidic or alkaline solutions.
• Hydroxide Collection Captures hydroxides after precipitation by strong alkalis while resisting tearing during filtration.
• Strong Acid and Alkali Filtration High chemical resistance allows clarification of strongly acidic or alkaline suspensions.
• Precipitate Recovery The tough hardened surface lets analysts scrape retained precipitates directly from the paper.
• Critical Analytical Filtration Medium 8 micron retention and high wet strength suit a wide range of quantitative laboratory separations.
• Metal Determination Frequently used in quantitative analysis of metals where low contaminant introduction is essential.