Quantitative Filter Paper Discs, Grade 542, 2.7um, 55mm, Hardened Ashless, 100/Pk
GVS SKU: FP055DF542QANC01

Featuring an acid-hardened, ashless cellulose medium produced from high-quality cotton linters, these 55mm Grade 542 quantitative filter paper discs deliver high retention of fine particles under chemically demanding conditions. The hardened surface provides high wet strength and excellent resistance to strong acid and alkali solutions, while the slow flow rate captures very fine precipitates with a nominal particle retention of 2.7um. Each disc carries an extremely low ash content, making it well suited to ignition-based gravimetric procedures where filter residue affects results.

Key Cellulose Media Characteristics

• Hardened ashless cellulose manufactured from high-quality cotton linters for purity and mechanical strength.
• Nominal particle retention of 2.7um with a slow flow rate for high retention of fine precipitates.
• Acid-hardened surface delivering high wet strength and resistance to strong acid and alkali solutions.
• Extremely low ash content (0.006% maximum) to minimize contamination during ignition.
• Hard, smooth surface that aids complete precipitate recovery and clean transfer.

Key Construction Characteristics

• Diameter: 55mm circles.
• Grade: 542, quantitative hardened ashless.
• Nominal thickness: 150um.
• Nominal basis weight: 96 g/m2.
• Pack: 100 discs, nonsterile.

These discs maintain consistent retention and flow characteristics across production lots, supporting reproducible analytical methods. The combination of low inorganic residue and high mechanical integrity allows reliable capture and transfer of fine precipitates. They are particularly suited to gravimetric metal determinations and hydroxide collection in harsh chemical environments.

Color

White

Diameter

55mm

Flow Speed

Slow

Grade

542

Hardened (Yes/ No)

Yes

Material

Cellulose (cotton linters)

Nominal Ash Content (%)

0.006

Nominal Basis Weight (g/ m²)

96

Nominal Thickness (µm)

150

Pack Count

100

Particle Retention

2.7 um

Pore Size (µm)

2.7

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wet Strengthened (Yes/ No)

Yes

Wettability

Hydrophilic

Whatman Equivalent

1542-055

• Gravimetric Metal Determination Captures fine metal precipitates in acid and alkali solutions for accurate ignition-based weighing.
• Hydroxide Collection Retains fine hydroxide precipitates formed after precipitation by strong alkalis.
• Fine Precipitate Filtration The 2.7um slow-flow medium retains very fine particles under demanding analytical conditions.
• Trace Element Analysis Extremely low ash content minimizes contamination for reliable trace element work following filter ignition.
• Critical Analytical Filtration Acid-hardened, high wet-strength construction withstands aggressive acid and alkali suspensions.
• Buchner Funnel Filtration High wet strength supports pressure and vacuum filtration of fine precipitates.