Achieve optimum filtration. Munktell Filtrak™ Micro-Glass Fibers used in Munktell filters are made of 100% borosilicate glass of varying diameters fine-tuned to the particle retention and flow requirements of the grades.

Manufactured under strictly controlled conditions. Whatman™ Cellulose Nitrate Membrane Filters have a noticeably improved flexibility and are made to tolerate abuse during handling, loading, and autoclaving without sacrificing integrity.

Supports accurate analysis in applications sensitive to very low levels of background contamination. Whatman™ Quantitative Filter Paper: Grade 40 Circles are additionally useful in gravimetric analysis where ash content might affect weight measurements of combusted samples.

Cover tables, benchtops and shelves to absorb spilled/splashed liquids. Macherey-Nagel™ MN 713 Grade Filter Paper, Folded is a smooth, thick technical filter paper with medium filtration speed for use in general lab applications and to protect surfaces from a range of substances.

Grade 181 seed testing circles

Laboratory centrifuge accessory

Covers a wide range of laboratory applications and is frequently used for clarifying liquids. Whatman™ Qualitative Filter Paper: Grade 1 Circles are widely used standard grade filter papers for routine applications with medium retention and flow rates.

Retains and absorbs more than Grade 1 filters, with a corresponding increase in filtration time. Whatman™ Qualitative Filter Paper: Grade 2 Circles are used for monitoring specific contaminants in the atmosphere and in soil testing.

High wet strength due to the addition of chemically stable resin

Saves time required to fit circles into conical funnels. Whatman™ Grade 2V Folded Qualitative Filter Papers provide medium flow and nominal particle retention rating of 8µm at a higher filtration speed.

For general laboratory filtration, clarification of buffer and reagent solutions.

A filter paper used in analytical works in laboratories with medium filtration velocity.

Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Paper: Grade 4 Circles are used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

Captures very fine particulate samples such as insoluble molecules in fats or oils. Whatman™ Grade 589/3 Quantitative Filter Paper Circles provide accurate measurement of ash-free dry mass.

Suitable for typical general filtration tasks.

Fisherbrand™ Grade 144 Qualitative Phosphate-free Special Filter Paper are used for mineral analysis in soil extracts.

Filters fine particulates.

Retains medium fine precipitates using material with virtually no ash content. Whatman™ Grade 589/2 Quantitative Filter Paper is used when medium fine precipitates are being collected and papers must be ashed to support analysis.

Improves performance and longevity of equipment. Whatman™ Grade 92 Glass Microfiber Filter Paper can be used for a wide range of applications.

Folded filter paper saves time, increases loading capacity

Pleated to save time and achieve optimal fit in conical filter funnels. Whatman™ Qualitative Filter Paper: Grade 595½ Pleated Circles provide extra surface area to increase total loading capacity.

Filters and retains extremely small particles. Whatman™ Quantitative Filter Paper: Grade 42 Circles are suitable for processes that require ashing.

Contains very low ash content appropriate for gravimetric analyses requiring sample combustion. Whatman™ Grade 43 Quantitative Filter Paper can be ashed during gravimetric analysis without contributing substantially to the measured weight.

Use for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates or for quantitative air pollution analysis. Whatman™ Quantitative Filter Paper: Grade 41 Circles are commonly used in preparing samples for metal analysis after nitric acid digestion.

Retains the fine precipitates encountered in chemical analysis. Whatman™ Qualitative Filter Paper - Grade 5 Circles are excellent clarifying filters for cloudy suspensions and for water and soil analysis.

Captures tiny particles without becoming weak. Whatman™ Glass Microfiber Filter Paper Grade 6 may also be used for determination of filterable substances and residue upon ignition or analysis of aggressive media.