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Whatman® Quantitative Filter Paper, Ashless, Grade 41 Circles, Diam. 150 Mm, Pack Of 100
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Specifications:
| Application | Filtration, Analytical Chemistry |
| Storage Temperature | Ambient |
| Product Type | Filter Papers |
| Product Brand | Whatman™, Cytiva |
| Product Grade | Analytical grade |
The Whatman™ Grade 41 Quantitative Filter Papers are high-performance, ashless cellulose filters designed for fast filtration and precise gravimetric analysis. With an extremely low ash content (≤0.007%), these filters are ideal for applications where accurate quantitative results and minimal residue are critical.
Featuring a coarse particle retention (~20 µm) and rapid filtration speed (Herzberg ~54 seconds), Grade 41 filter papers are widely used in environmental testing, particularly for soil and air pollution analysis, as well as in sample preparation for metal analysis following acid digestion.
Key Features
Ashless for Accurate Quantitative Analysis
- Extremely low ash content (≤0.007%)
- Minimizes contamination during gravimetric analysis
- Ensures precise and reproducible analytical results
Fast Filtration Performance
- One of the fastest filter papers in the ashless range
- Herzberg filtration speed of approximately 54 seconds
- Improves laboratory efficiency and throughput
Coarse Particle Retention
- Nominal particle retention of ~20 µm
- Suitable for filtering coarse precipitates and environmental samples
- Ideal for rapid separation processes
High-Purity Cellulose Composition
- Manufactured from refined cellulose fibers
- Chemically stable and consistent performance
- Suitable for analytical and environmental workflows
Versatile Format Options
- Available in a wide range of circular diameters and sheet formats
- Compatible with standard filtration apparatus and funnels
- Also available in convenient FilterCup formats
Applications
- Gravimetric analysis in analytical chemistry
- Soil and air pollution monitoring
- Environmental sample preparation (soil, sludge, particulates)
- Filtration of samples after nitric acid digestion for metal analysis
- Preparation for ICP, AAS, and elemental analysis
- Routine laboratory quantitative separations
- Industrial and environmental testing workflows
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Quantitative Filter Paper (Ashless) |
| Grade | Whatman Grade 41 |
| Material | Cellulose |
| Ash Content | ≤0.007% |
| Particle Retention | ~20 µm |
| Filtration Speed | Fast (Herzberg ~54 s) |
| Format | Circles / Sheets |
| Application | Gravimetric and environmental analysis |
| Pack Size | 100 sheets per pack |
Available Models and Ordering Information
| Catalog Number | Diameter / Size | Format | Pack Size |
|---|---|---|---|
| 1441-042 | 42.5 mm | Circles | 100/pk |
| 1441-047 | 47 mm | Circles | 100/pk |
| 1441-050 | 50 mm | Circles | 100/pk |
| 1441-055 | 55 mm | Circles | 100/pk |
| 1441-060 | 60 mm | Circles | 100/pk |
| 1441-070 | 70 mm | Circles | 100/pk |
| 1441-090 | 90 mm | Circles | 100/pk |
| 1441-110 | 110 mm | Circles | 100/pk |
| 1441-125 | 125 mm | Circles | 100/pk |
| 1441-150 | 150 mm | Circles | 100/pk |
| 1441-185 | 185 mm | Circles | 100/pk |
| 1441-240 | 240 mm | Circles | 100/pk |
| 1441-320 | 320 mm | Circles | 100/pk |
| 1441-866 | 203 × 254 mm | Sheets | 100/pk |
Workflow Integration
Sample Preparation → Filtration (Grade 41) → Drying / Ashing → Gravimetric Measurement / Elemental Analysis
This workflow ensures:
- Minimal residue interference
- Accurate mass determination
- Reliable environmental and analytical results
Unique Advantages
- Ultra-low ash content for high-precision quantitative analysis
- Fast filtration speed improves laboratory productivity
- Ideal for environmental monitoring and pollution analysis
- Compatible with acid digestion workflows and metal analysis
- Available in a wide range of sizes for flexible applications
- Trusted Whatman™ quality for analytical laboratories
The Whatman™ Grade 41 Quantitative Filter Papers (Ashless) provide a reliable and efficient solution for fast filtration and precise gravimetric analysis. With their low ash content, high flow rate, and suitability for environmental applications, they are an essential tool for laboratories performing soil, air, and elemental analysis where accuracy and speed are critical.
- Diameter: Ø 90mm Ø 110mm Ø 125mm Ø 150mm Ø 185mm Ø 240mm