Whatman Filter Paper 42 Pore Size

Smooth surface for easy recovery of precipitates.

Whatman filter paper 42 pore size. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis. It has a very smooth surface making it easy to scrape or. Below are summaries of the grade properties and common uses. Different types of qualitative whatman filter paper their properties the most common qualitative paper grades are 1 6 595 597 598 and 602 which have applications across multiple industries.

Whatman grade 42 quantitative filter paper ashless whatman 1442 125 ashless grade 42 quantitative filter paper diameter. It has a slow flow rate and is very hard and strong with excellent chemical resistance. 2 5 μm slow filter paper a world standard for critical gravimetric analysis with the finest particle retention of all whatman cellulose filter papers. 12 25 μm a fast filter paper with high wet strength.

Sterile filtration use sterile filter and membrane with pore size 0 2 μm. Ultra fine filter with retention. 25 μm only half the thickness of grade 113 and suitable for coarse or gelatinous precipitates. Our membrane filter offering includes pore sizes from 0 015 to 12 µm.

The tough surface makes these filters suitable for a wide range of critical filtration procedures. Whatman filter papers and membranes are world renowned as a standard for laboratory filtration and are associated with quality reliability and reproducibility. Select the optimal whatman filter for your application whatever you need to filter whatman has it covered. Membrane filters are recommended for retention of very small particles or for microbiological purposes.

This is the filter paper size chart used to be on whatman s boxes. 2 5µm p whatman 1442 125 ashless grade 42 quantitative filter paper diameter. Whatman grade 542 filter paper has a high retention of fine particles 2 7 μm at 98 efficiency under demanding conditions. 2 5 μm slow filter paper a world standard for critical gravimetric analysis with the finest particle retention of all whatman cellulose filter papers.

Thickest filter paper in the whatman range. Grade 540 8 µm. Typical analytical precipitates include barium sulfate metastannic acid and finely precipitated calcium carbonate. Whatman grade 542 filter paper is often used in gravimetric metal determinations.

Grade 42 2 5 µm grade 44 3 µm medium precipitate.