Quantitative Filter Paper
Product Overview
This beimu brand quantitative filter paper (ashless filter paper) strictly complies with national standard GB/T1914-2017, specially developed for laboratory gravimetric analysis, precipitation filtration and chemical testing. Produced with high-purity wood pulp in Hangzhou Fuyang factory, the filter paper leaves nearly zero ash after high-temperature incineration, which will not interfere with experimental calculation results. We supply multiple standard diameters, three filtration speed grades, single-box retail and bulk full-spec combo packages, with custom sizes available for global lab distributors, testing institutes and university labs.
Premium Raw Material & Core Advantages
● Ultra-low Ash Content, Professional for Quantitative Experiments: Made from refined pure wood pulp without inorganic filler. After complete burning, residual ash weight is negligible, eliminating data deviation in gravimetric precipitation tests - an irreplaceable consumable for chemical titration, metal ion detection and soil residue analysis.
● Stable Uniform Pore Structure, Consistent Filtration Performance: Precise paper-making craft ensures even fiber distribution across every sheet. Three flow rate types (fast / medium / slow) deliver stable separating effect for coarse particles, common precipitates and fine micro-sediments respectively. No fiber shedding during filtration to avoid sample contamination.
● Good Wet Strength & Chemical Resistance: Tough fiber structure resists breakage when soaked in water, weak acid and weak alkali solutions. It maintains intact shape during vacuum filtration, hot liquid filtering and repeated suction filtration operations, greatly reducing experiment waste.
● Neat Standard Cutting, Complete Specifications: Each round filter paper is die-cut into smooth, burr-free circles, perfectly matching standard glass funnels. Standard diameters cover 7cm, 9cm, 11cm, 12.5cm, 15cm, 18cm, 20cm etc. The 15cm specification shown in the picture is widely used for large-volume soil & industrial liquid testing.
Wide Application Scenarios
● Chemical Laboratories: Gravimetric analysis, precipitate separation, chemical reagent filtration, metal element testing.
● Geotechnical & Construction Testing Labs: Soil water extract filtration, cement & aggregate solution detection.
● Environmental Monitoring Institutions: Sewage, surface water, industrial waste liquid impurity separation.
● Agricultural & Food Labs: Crop extract filtration, food residue detection.
● Universities & Research Institutes: Chemistry, environmental engineering teaching and research experiments.
Diversified Specifications & Customized Solutions
Multiple Standard Sizes In Stock
Standard circular diameters ranging from Φ7cm to Φ20cm, including the popular Φ15cm model displayed. Each box contains 100 sheets, with clear outer packaging marking size and standard code for easy storage and inventory management.
Three Filtration Speed Grades Optional
- Fast flow: Large pores, for filtering coarse sediment.
- Medium flow: General-purpose, most widely used for routine lab tests.
- Slow flow: Tiny dense pores, for capturing ultra-fine precipitates.
Customization & Combo Set Sales
- Custom non-standard round/square sizes for special funnel equipment.
- Mixed-spec full set packages: Combine different diameters and flow speeds in bulk orders for laboratories with multi-scene testing demands.
- Wholesale discounts for bulk set purchases, unified carton packaging for convenient ocean/air shipment.
FAQ
Q1: What Is The Difference Between Quantitative Filter Paper And Qualitative Filter Paper?
A1: Quantitative filter paper uses ash-free pure pulp; its residual ash after burning is extremely low, so it is used for gravimetric experiments that require accurate mass calculation. Qualitative filter paper contains mineral fillers with high ash residue, only suitable for simple impurity separation without weight measurement requirements.
Q2: Can This Quantitative Filter Paper Be Used For Filtering Acidic And Alkaline Samples?
A2: It tolerates weak acid and weak alkali solutions for short-term filtration. For strong acid or strong base liquid, we recommend matching special glass fiber filter paper to prevent fiber corrosion and breakage.
Q3: Do You Support Mixed-Spec Bundle Sales And Bulk Wholesale For Lab Instrument Dealers?
A3: Yes. We offer flexible combo sets with mixed diameters and three filtration speeds. Large-quantity bulk orders enjoy exclusive wholesale pricing. We can also print custom brand logos on packaging for global distributors.
Development History
Founded in 2009 with a registered investment of 3 million RMB, our company secured a firm foothold amid fierce market competition in the early startup phase, supported by sharp market insight and a professional sales team. With continuous technical upgrades and surging global market demand, Wanluda has ramped up investment in product development and expanded our product portfolio year by year, earning remarkable recognition across the industry. Thanks to reliable product quality and consistent positive market reputation, we have gained long-term trust from global partners, expanded our business coverage extensively, and grown into a key domestic manufacturer of testing instruments.
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