Quantitative Ashless Filter Paper, Grade 42, 2-3um Retention, 47mm Circle, Cellulose, 100/Pk
GVS SKU: FP047DXS42QANC01

Featuring a high-purity cellulose depth medium engineered for critical gravimetric work, this Grade 42 quantitative ashless filter paper captures fine particulate within a random matrix of cellulose fibers across the full depth of the sheet. The 47mm circles deliver a very slow filtration rate paired with a 2 to 3 micron nominal retention range, the finest in the quantitative cellulose series, making them well suited to collecting fine precipitates that tend toward colloidal dispersion. A nominal thickness of 160um and a basis weight of 100 g/m2 give the sheet body and consistent flow behavior across lots, while an ash content below 0.007% keeps background contribution to combusted samples to a minimum.

Key Cellulose Media Characteristics

• Ashless purity: Ash content below 0.007% supports accurate weight measurements in ignition-based and combusted-sample procedures.
• Fine particle retention: Nominal 2 to 3 micron retention range captures extremely small particles and fine precipitates such as barium sulfate and metastannic acid.
• Very slow flow: The dense fiber structure prioritizes maximum capture of fine particulate over filtration speed for gravimetric accuracy.
• Depth filtration: Separation occurs by entrapment within the random cellulose fiber matrix throughout the depth of the medium.
• Wet strength: A wet bursting strength of 52 kPa supports handling during vacuum and funnel filtration.

Key Construction Characteristics

• Material: High-purity cellulose, ashless quantitative grade.
• Format: 47mm diameter circles (discs).
• Nominal thickness: 160um.
• Basis weight: 100 g/m2.
• Pack: 100 discs per box, nonsterile.

This quantitative grade delivers the controlled, low-residue performance required when filter mass directly affects analytical results. Consistent retention and flow from lot to lot help maintain method reproducibility across production runs. The fine cutoff and high purity make it a dependable choice for protecting sample integrity in trace and gravimetric determinations.

Color

White

Diameter

47mm

Dimensions

47mm circle

Flow Speed

Very Slow

Grade

42 (Quantitative, Ashless)

Material

Cellulose

Mesh Format

Circle

Nominal Ash Content (%)

<0.007

Nominal Basis Weight (g/ m²)

100

Nominal Thickness (µm)

160

Pack Count

100

Particle Retention

2-3 um

Pore Size (µm)

2-3

Qualitative/ Quantitative

Quantitative

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 42

• Gravimetric Analysis Collects fine precipitates such as barium sulfate and metastannic acid for accurate mass-based determinations.
• Sample Preparation for Instrumental Analysis Removes extremely small particles ahead of spectroscopic and chromatographic methods like AAS.
• Ashing Procedures Ash content below 0.007% makes the paper suitable for processes that require ignition of the filter and captured solids.
• Cement and Mineral Analysis Serves as a calcium carbonate filter and for elemental content work in cement, clay, and pigment applications.
• Environmental and Soil Filtration Separates fine solid matter from aqueous extracts in soil and environmental sample analysis.
• Trace-Level Filtration Very slow, fine retention clarifies solutions where minimal background contamination is critical.