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Thumbnail Filmstrip of Quantitative Filter Paper, Grade 542, Slow, 2.0-4.0um, 125mm, Hardened Ashless, 100/Pk Images
Featuring an acid-hardened, ashless cellulose medium made from high-quality cotton linters, this Grade 542 quantitative filter paper delivers high retention of fine precipitates under demanding analytical conditions. The 125mm circles provide a slow flow rate paired with a 2.0 to 4.0 micron retention range, making them well suited to critical gravimetric work where tough, low-ash media are essential. Each pack contains 100 hydrophilic discs.
Key Glass Fiber Media Characteristics
- Hydrophilic cellulose medium manufactured from refined pulp and pure cotton linters for consistent, reproducible filtration.
- Quantitative ashless grade with extremely low ash content, ideal for gravimetric analysis where residue must be minimized.
- Acid-hardened structure that provides high wet strength and a tough surface for repeated handling.
- High chemical resistance to strong acid and alkali suspensions.
- Slow flow, fine-particle retention in the 2.0 to 4.0 micron range for capturing fine precipitates.
Key Construction Characteristics
- Grade: 542, quantitative, hardened, ashless.
- Format: 125mm diameter circles.
- Wettability: Hydrophilic.
- Sterility: Nonsterile.
- Pack: 100 discs per pack.
This filter paper maintains reliable, reproducible performance across critical analytical separations, including the gravimetric determination of metals in acidic and alkaline solutions. Its hardened surface preserves sample integrity during difficult filtrations, while the low ash content supports accurate quantitative results.
- Color
- White
- Diameter
- 125mm
- Flow Speed
- Slow
- Grade
- Quantitative
- Hardened (Yes/ No)
- Yes
- Material
- Cellulose
- Pack Count
- 100
- Pore Size (µm)
- 2.0-4.0
- Qualitative/ Quantitative
- Quantitative
- Sterility
- Nonsterile
- Wettability
- Hydrophilic
- Whatman Equivalent
- 1542-125
- Gravimetric Metal Determination The ashless, acid-hardened cellulose makes this grade well suited for capturing fine precipitates in metal determinations.
- Hydroxide Collection Its high wet strength and chemical resistance support collecting hydroxides after precipitation by strong alkalis.
- Fine Precipitate Filtration The 2.0 to 4.0 micron slow-flow medium retains fine precipitates under demanding conditions.
- Critical Quantitative Analysis Extremely low ash content makes the paper appropriate for gravimetric and quantitative analytical work.
- Acid and Alkali Suspension Filtration High chemical resistance allows filtration of strong acid and alkali suspensions without breakdown.