Filtration
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Filtration · Filtration · Filtration www.mn-net.com www.mn-net.com Quality filters „Made in Germany“ since 1911 Filter Circles Folded Filters Technical Cuts Extraction Thimbles

Filter papers Extraction thimbles Test papers Filter papers Filter papers for special applications……………………………………… 16 Extraction thimbles Indicator and test papers

Welcome to MACHEREY-NAGEL! We are pleased that you are interested in our range of high quality filtration products. In a new design, we present our filter papers, filter membranes and extraction thimbles for a broad range of applications as well as special products made from filter paper. Our catalogue “Filtration” also includes pH indicator papers, as well as test papers for qualitative and semi-quantitative analysis. This will give you an overview of the extensive range of applications for these products. Perhaps you may find a convenient solution to one of your analytical tasks. For more...

Filter papers Raw materials and manufacture For production of the high quality MN filter papers we use cotton linters, refined pulp with a high level of a-cellulose as well as glass fibres. Cotton linters are short-fibred seed hairs from cotton seeds, which cannot be used for textile purposes, but which are highly suitable for the manufacture of soft and absorbent filter papers. In addition to cotton linters we use mainly pulp, which is obtained by chemical treatment of plant materials, e.g. coniferous or deciduous wood. At MACHEREY-NAGEL only the most experienced paper specialists select...

Selection of filter papers Important filtration properties for certain applications Application Recommended filter filter cake ignition and quantitative determination of the residue (gravimetric analysis) analysis of the filtrate; it is important that no interfering substances are extracted from the filter paper mechanical removal of the filter cake from the filter, e.g. with a jet from a wash bottle or with a spatula separation of an organic solvent from water visualisation of small amounts of light precipitates technical filtration or need for large cuts retention of very fine...

Particle retention of MN filter papers The particle retention capacity is an important parameter for characterising a filter paper. The following diagram shows typical values of our analytical filter papers. ashless, wet-strengthened qualitative qualitative, wet-strengthened gm How to read the graph no retention complete retention www.mn-net.com

Filter papers for quantitative analysis Ashless filter papers Ashless filter papers are particularly suited for quantitative routine analysis and are manufactured from refined pulp and linters. They are acid-washed and have an extremely low ash content of < 0.01 %. The amount of a-cellulose is about 95 %. Technical data Color code Thickness Filtration Basis speed weight MN 640 we MN 640 w = No. 41 grey label = black ribbon MN 640 m = No. 43 white label = white ribbon MN 640 md = No. 40 yellow label = red ribbon MN 640 dd = No. 44 blue label = green ribbon MN 640 d = No. 42 green label =...

quantitative analysis These wet-strengthened hard filter papers are manufactured from refined pulp and linters and have a low ash content of < 0.01 %. They are often used for quantitative routine procedures and for analytical gravimetric applications. Due to their high mechanical strength in wet condition they are particularly suited for applications, where the residue is removed from the filter e.g. with a spatula or a jet of water. Technical data Properties Thickness Filtration Basis speed weight MN 1640 we wet-strengthened, very fast filtration, smooth 0.22 mm 5 s 85 g/m2 MN 1640 w...

Filter papers for qualitative analysis Standard filter papers for qualitative analysis Qualitative filter papers are manufactured from the same raw materials as the ashless grades and are particularly suited for general laboratory filtrations. The average ash content is about 0.1 %, the amount of a-cellulose is about 95 %. Technical data Thickness Filtration speed Basis weight MN 617 we extra soft, fast filtration, smooth MN 617 = No. 4 soft, fast filtration, smooth MN 615 = No. 1 medium fast filtration, smooth MN 616 medium fast filtration, smooth MN 618 = No. 3 medium fast filtration,...

Wet-strengthened filter papers for qualitative applications Wet-strengthened analytical filter papers are manufactured from refined pulp and linters and feature a content of a-cellulose of more than 95 %. The smooth surface of these papers allows fibre-free filtration. They feature a high wet strength and can also be used in the filtration of strongly alkaline or strongly acidic solutions. Due to their high mechanical strength in wet condition they are particularly suited for applications, where the residue is removed from the filter e.g. with a spatula or a jet of water. Technical data...

LJ glass fibre filters Glass fibre filters / quartz fibre filters Glass fibre filters allow a fast filtration and simultaneously a very high particle retention. They are manufactured from boro-silicate glass fibres and are chemically resistant towards most organic and inorganic solvents (except HF). For the analysis of air-borne particles we recommend the quartz fibre filters MN QF-10 which feature an extremely low content of metal traces. Technical data Grade Thickness Basis Filtration Particle Max. Binder weight speed air retention temperature

Ordering information (cont.) References for packs of 100 filters other sizes and cuts on request

Filter papers ntitative analysis qualitative analysis glass fibre filters technical applications -K- Filter papers for technical applications The filter papers listed below are mainly recommended for technical applications such as industrial filiations. They are available as sheets, filter circles, folded filters (in part), cuts of almost any shape and as rolls. On request, we will be glad to produce other filter papers or filter papers with special properties as to customers demand. Grade Application and properties MN 713 medium speed, for general laboratory use 0.15 mm MN 615 A medium...