Description
1. Product Overview
GF/F Filter Paper is a high-performance, binder-free borosilicate glass microfiber filter designed for rapid, efficient filtration of fine particulates. Its primary industrial use is in environmental monitoring, water/wastewater analysis, biochemistry, and cell culture applications requiring high retention and loading capacity. The key value proposition lies in its 0.7 µm nominal particle retention with high flow rates and minimal adsorption, delivering both speed and analytical accuracy. It is strategically important in the market as the industry standard for Total Suspended Solids (TSS), chlorophyll analysis, and DNA binding protocols where consistency and reproducibility directly impact regulatory compliance and research integrity.
2. Key Specifications & Technical Characteristics
- Material Composition: 100% borosilicate glass microfiber, binder-free
- Grade: Equivalent to Whatman Grade GF/F; analytical grade for quantitative analysis
- Physical Characteristics:
- Nominal Particle Retention: 0.7 µm
- Thickness: 0.42 mm
- Basis Weight: 75 g/m²
- Flow Rate: 6.7 s/100ml (Herzberg)
- Color: White, uniform texture
- Tensile Strength: High wet strength for vacuum and pressure filtration
- Packaging Options: 100 sheets/box or 50 sheets/box; available in diameters from 21 mm to 150 mm; custom slitting and bulk rolls for OEM
- Shelf Life: Indefinite when stored in original packaging in dry, ambient conditions
3. Core Industrial Applications
- Primary Industries: Environmental testing laboratories, municipal water treatment, pharmaceuticals, biotechnology, food & beverage, petrochemicals, and academic research
- Specific Operational Use Cases:
- Total Suspended Solids (TSS) and Total Dissolved Solids (TDS) determination per EPA Method 160.2
- Chlorophyll-a and phytoplankton analysis in marine and freshwater studies
- Clarification of protein solutions and cell culture media
- Pre-filtration for HPLC sample preparation and membrane protection
- Air monitoring for particulates and aerosols
- Performance vs Alternatives: Outperforms cellulose filters in chemical resistance, temperature stability up to 500°C, and loading capacity. Delivers faster flow rates than membrane filters at equivalent retention, reducing processing time and labor costs
- Efficiency, Durability, Cost Advantages: High dirt-holding capacity extends filter life and reduces change-out frequency. Binder-free composition eliminates extractables, ensuring low background in trace analysis and preventing contamination costs
4. Competitive Advantages
- Quality Consistency: Manufactured under ISO 9001 with batch-to-batch uniformity verified by BET surface area and pore size testing. CofA and CofC provided with each lot
- Supply Reliability: Multi-site production with 99.2% on-time delivery rate and dedicated safety stock programs for contract clients
- Logistics Capability: Global warehousing in NA, EU, and APAC. Export-ready with MSDS, REACH, RoHS documentation. Palletized, humidity-controlled shipping available
- Price Competitiveness: Tiered volume pricing and annual contracts. 15-22% lower total cost of ownership vs. mixed esters membranes when factoring flow rate and throughput
- Sustainability or Environmental Benefits: Chemically inert, incinerable with minimal ash. Plastic-free packaging options available. Supports labs targeting green procurement metrics
- Technical Support or Documentation Availability: 24/7 application engineering support, validation guides for EPA/ISO methods, and full regulatory dossiers for FDA and pharmacopeia compliance
5. Commercial & Supply Information
- Minimum Order Quantity (MOQ): BULK 20MT
- Loading Capacity (MT per container): 18 MT per 20ft container / 25 MT per 40ft container








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