Whatman Filter Paper Size

Whatman sup grade 541 filter paper has a particle filtration size of 22 μm.

Whatman filter paper size. Coffee filters of paper are made from about 100 g m 2 crêped paper the crêping allows the coffee to flow freely between the filter and the filtration funnel the raw materials for the filter paper are coarse long fiber often from fast growing trees both bleached and unbleached qualities are made. It has a very smooth surface making it easy to scrape or. 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. Our membrane filter offering includes pore sizes from 0 015 to 12 µm.

Traditionally this grade is used in qualitative analytical separations for precipitates such as lead sulfate calcium oxalate hot and calcium carbonate. Quality reproducibility and uniformity are maintained by using only the highest quality raw materials the filters are tested for grammage thickness airflow and. 25 μm only half the thickness of grade 113 and suitable for coarse or gelatinous precipitates. Extended range of sizes includes 10 to 500 mm diameter circles and 460 x 570 mm sheets.

11 μm medium flow filter paper the most widely used filter paper for routine applications with medium retention and flow rate. This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman grade 541 filter paper is used for fast filtration of coarse particles and gelatinous precipitates in acid alkali solutions during gravimetric analysis. 12 25 μm a fast filter paper with high wet strength.

Membrane filters are recommended for retention of very small particles or for microbiological purposes. Smooth surface for easy recovery of precipitates. Whatman is a leading developer of high end laboratory filtration products and separation technologies in addition to more traditional offerings such as whatman filter papers membranes syringe filters and blotting whatman proposes solutions for high technologies such as sample preparation before uhplc handling of dna samples at room temperature or high throughput screening. Below are summaries of the grade properties and common uses.

Whatman filter papers and membranes are world renowned as a standard for laboratory filtration and are associated with quality reliability and reproducibility. Thickest filter paper in the whatman range. This whatman 1 5cm grade 1 cellulose filter paper is the most widely used filter paper for routine applications with medium retention 11µm and flow rate. Coffee filters are made in different shapes and sizes to fit into different holders.

Very useful as a rapid filter for routine clean up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles. There are many sizes materials types and grades of filter paper available for a variety of applications.