Description
Professional Laboratory Filter Paper (Qualitative & Quantitative Grades)
Our Professional Laboratory Filter Paper is engineered from premium, high-purity cellulose cotton linters to deliver exceptional filtration efficiency, particle retention, and fluid flow rates. Designed for routine laboratory analysis, environmental monitoring, gravimetric testing, and liquid clarification, these high-grade filter circles ensure clean, reproducible separations across medical, agricultural, and industrial quality control sectors.
Key Features & Benefits
1. Ultra-Pure Cellulose Formulation
Manufactured using advanced water-purification techniques, this filter paper features an extremely high alpha-cellulose content ($\ge 98\%$). This guarantees chemical inertness, resistance to organic solvents and weak acids, and minimal background trace elements, ensuring your sample filtrate remains entirely untainted.
2. Versatile Particle Retention Ratings
Available in multiple specialized pore-size grades to match your specific laboratory flow requirements. Whether you require rapid filtration for coarse precipitates (like ferric hydroxide) or slow, high-efficiency retention for fine crystalline precipitates (like barium sulfate), our paper delivers consistent, predictable performance.
3. Optimized Ashless Options (Quantitative Analysis)
For analytical chemistry workflows involving ash-gravimetric tracking, our quantitative filter grades undergo rigorous acid-washing (typically hydrochloric and hydrofluoric acids). This limits the total ash content to less than $0.007\%$, allowing for seamless sample ignition in a muffle furnace without introducing measurable mathematical errors.
4. Solid Circular Layout (Without Divider)
To maximize filtration surface area and maintain absolute uniformity, this filter paper is supplied as a clean, seamless solid circle without any pre-scored dividers, slits, or center holes. The completely continuous surface structure prevents bypass leaks and allows for uniform folding into standard glass or plastic funnels.
Technical Specifications
| Specification | Details |
| Material Base | 100% High-Purity Alpha-Cellulose Cotton Linters |
| Available Grades | Qualitative (Routine Separation) & Quantitative (Ashless Gravimetric) |
| Ash Content (Quantitative) | $\le 0.007\%$ (Acid-washed for precise gravimetric tracking) |
| Ash Content (Qualitative) | $\le 0.13\%$ |
| Pore Size Range | Coarse (15–20 $\mu\text{m}$), Medium (8–11 $\mu\text{m}$), Fine (2–3 $\mu\text{m}$) |
| Structural Design | Solid circular discs (No dividers, slots, or pre-cuts) |
| Standard Diameters | 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 180 mm |
Product Size & Weight (Standard 100-Pack Box)
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Standard Box Contents: 100 Circular Filter Paper Discs per sealed box.
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Package Dimensions (W x H x D): Approx. 120 mm x 30 mm x 120 mm ($4.7″ \times 1.1″ \times 4.7″$) for typical 110mm circles.
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Net Weight (NW): Approx. 0.15 kg ($0.33 \text{ lbs}$) per box.
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Gross Weight (GW): Approx. 0.25 kg ($0.55 \text{ lbs}$) shipped in a reinforced, moisture-resistant protective export carton.
Ideal Applications
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Analytical & Gravimetric Chemistry: Precise sample ignition, material separation, and precipitate weighing inside analytical labs.
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Environmental Water Quality: Filtering suspended solids, soil extracts, and atmospheric pollution particles from environmental samples.
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Food & Beverage Testing: Clarifying liquid extracts, separating organic precipitates, and conducting juice, malt, or syrup quality validation.
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Industrial Manufacturing: Routine oil testing, electroplating solution maintenance, and chemical substance extraction monitoring.
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