Quantitative filter paper is made of high-quality commercial cotton pulp using advanced production and post-processing techniques; it has very little residual ash after burning and has almost no influence on the analysis results and is suitable for precise quantitative analysis. Produced under strict quality control, these high-purity filter papers are used in various important analysis and filtration steps.
Hawach BIO-40 Quantitative filter paper is a star product equivalent to Whatman’s filter paper Grade 40. Because Hawach integrates R&D and sales, our vacuum filter paper has more competitive. Filter paper filtration is more effective against chemical reactions, so it produces fewer impurities and can be used for quantitative analysis.
Quantitative medium flow filter paper Grade 40 has slow particle retention (8μm), but chemical filter paper bio-43 is higher particle retention of 3um. Quantitative filter paper filtration is used in several test methods. Commonly used filters in many standardized test methods, such as sample preparations and gravimetric analysis.
Features of Quantitative Filter Paper Filtration
1. Filter paper filtration 2. Medium flow filter paper 3. High retention rate 4. High-purity filters contain 0.007% maximum ash content 5. BIO-40 is equivalent to Whatman filter paper Grade 40
Advantages of Competitive Vacuum Filter Paper
1. ISO9001 & CE third-party certification 2. Lowest ashless content: < 0.007% 3. High purity and consistent performance 4. Easy to use: pre-cut filter paper for use directly 5. Full range of diameter and OEM size and types are available 6. Whatman Grade 40 equivalent quality but competitive vacuum filter paper
Applications of Quantitative Filter Paper Grade 40
Regular filtration Vacuum filtration Pressure filtration Particle size detection in dyes Analysis of the specific gravity of milk sediment Specific gravity analysis of cement, clay, iron, and steel products Clarification filtration of the solution before atomic spectroscopy Separation of solids from aqueous extracts during routine analysis Collect trace amounts of elements and radionuclides from the atmosphere Specific gravity analysis, filtration of the solution before a determination by atomic absorption spectrophotometry, and sampling in air pollution monitoring