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

Test papers customer service 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 analy- sis. This will give you an overview of the extensive range of applications for these products. Perhaps you may find a con- venient solution to one of your analytical tasks. For...

Introduction introduction Filter papers quantitative  analysis Extraction thimbles qualitative analysis Membranes glass fibre filters Test papers technical applications Filter papers Raw materials and manufacture © Javier Soto / Fotolia.de For production of the high quality MN filter papers we use cotton linters, refined pulp with a high level of α-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...

Extraction thimbles Filter papers quantitative  analysis Membranes glass fibre filters Test papers technical applications Indices special applications Selection of filter papers Important filtration properties for certain applications Application 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...

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, wet-strengthened complete retention

Filter papers Introduction introduction Extraction thimbles qualitative analysis Membranes glass fibre filters Test papers technical applications 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 α-cellulose is about 95 %. Technical data Grade Color code grey label ≡ black ribbon white label ≡ white ribbon yellow label ≡ red ribbon blue label ≡ green ribbon green label...

Introduction introduction Filter papers Extraction thimbles qualitative analysis Membranes glass fibre filters Test papers technical applications Wet-strengthened filter papers for 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...

Extraction thimbles Filter papers Membranes glass fibre filters Test papers technical applications 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 α-cellulose is about 95 %. Technical data Grade extra soft, fast filtration, smooth soft, fast filtration, smooth medium fast filtration, smooth medium fast filtration, smooth medium fast filtration, smooth...

Introduction introduction Filter papers Extraction thimbles qualitative analysis Membranes glass fibre filters Test papers technical applications Wet-strengthened filter papers for qualitative applications Wet-strengthened analytical filter papers are manufactured from refined pulp and linters and feature a content of α-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...

Filter papers Introduction introduction quantitative  analysis Extraction thimbles qualitative analysis Membranes glass fibre filters Test papers technical applications Glass fibre filters / quartz fibre filters Glass fibre filters allow a fast filtration and simultaneously a very high particle retention. They are manufactured from borosilicate 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...

Introduction introduction Filter papers quantitative  analysis Extraction thimbles qualitative analysis Membranes glass fibre filters Test papers technical applications Ordering information (cont.) References for packs of 100 filters Ø other sizes and cuts on request

Extraction thimbles Filter papers quantitative  analysis Membranes glass fibre filters Test papers technical applications Filter papers for technical applications The filter papers listed below are mainly recommended for technical applications such as industrial filtrations. 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. Smooth and thick filter papers Technical data Grade medium speed, for general laboratory...