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Thumbnail Filmstrip of Quantitative Filter Paper, Grade 42, 2.0um, 42mm, Ashless Hardened, Very Slow, 100/Pk Images
Featuring an acid-hardened, ashless cellulose medium built for critical gravimetric analysis, this Grade 42 quantitative filter paper delivers a 2.0 µm particle retention with a very slow filtration speed across a 42 mm disc. The medium measures 160 µm in nominal thickness and is hardened to provide high wet strength and broad chemical resistance, making it well suited to fine precipitate capture and recovery on the filter surface. Each pack contains 100 discs.
Key Cellulose Media Characteristics
- Hydrophilic cellulose construction that wets readily for consistent aqueous filtration.
- 2.0 µm nominal particle retention for capturing the finest precipitates with maximum gravimetric accuracy.
- Very slow filtration speed prioritizing fine-particle retention over throughput.
- Acid-hardened, ashless structure that minimizes residue and contamination during weighing and processing.
- High wet strength and chemical resistance suited to demanding analytical filtration.
Key Construction Characteristics
- Material: ashless hardened cellulose filter paper.
- Diameter: 42 mm disc format.
- Nominal thickness: 160 µm.
- Sterility: nonsterile.
- Pack: 100 discs per pack.
This filter paper maintains reliable, reproducible retention of fine particulates while preserving sample integrity for downstream analysis. The hardened surface supports recovery of precipitates retained on the filter, and the ashless composition ensures minimal residual contribution to gravimetric results. Its very slow flow and high retention make it a dependable choice for precise quantitative work.
- Color
- White
- Diameter
- 42mm
- Flow Speed
- Very Slow
- Grade
- 42
- Hardened (Yes/ No)
- Yes
- Material
- Cellulose (Ashless Hardened)
- Nominal Thickness (µm)
- 160
- Pack Count
- 100
- Particle Retention
- 2.0 µm
- Pore Size (µm)
- 2.0
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- Grade 42
- Gravimetric Analysis Captures the finest precipitates at 2.0 um retention for accurate quantitative weighing.
- Fine Precipitate Filtration Retains extra fine-grained precipitates such as barium sulphate and similar analytical precipitates.
- Clarification of Cloudy Suspensions Very slow flow and high retention clarify difficult or turbid solutions.
- Water and Soil Analysis Suited to demanding environmental sample preparation requiring maximum fine-particle removal.
- Precipitate Recovery Hardened surface allows recovery of precipitates retained on the filter after filtration.
- Critical Analytical Filtration Ashless, low-residue construction supports exacting laboratory analyses where contamination must be minimized.