DSL45 GRADE – Very fast filtration

- Filter paper of very high rate of filtration, wide-pored, soft, spongy structure, extremely low-ash content. 

- Food industry applications: determination of ash contents and PCB determination in foodstuffs.

- Beverage industry applications: processing (ashing) fruit juice samples for photometric determinations (e.g. phosphate).

- Environmental analysis: Determination of filterable substances and the residue on ignition (dry weight) for the examination of water, wastewater and sludge (DIN 38 409 part 2).

DFA41 GRADE – Fast filtration

- Fast ashless filter paper in the  GVS quantitative range together with DSL45. 

- It is particularly suitable for analytical procedures and tests involving large particles or gelatinous precipitates (e.g. metal hydroxides and sulphides). 

- It is also used in metal (Pb) tests in water testing analysis, quantitative air pollution analysis, food industry, paper industry, etc.

DME43 GRADE - Medium filtration

- Ashless filter paper with medium filtration speed and good retention (between Grade DMS40 and Grade DFA41) of medium and thick particles.

- Suitable for gravimetric measurements of gypsum/lime suspensions in power plants. 

- DME43 Grade is particularly applied in metallurgical industry laboratories for metal tests. Typical applications include foodstuffs analysis, soil analysis, particle collection in air pollution monitoring, - COD and TOC determination, inorganic analysis in the construction, mining and steel industries. They are also used for Blaine test in the cement industry (standards UNE 80-112-91 and EN 196-6), and - to carry out other chemical analysis on cement.

DMS40 GRADE – Medium-slow filtration

- The classic general purpose ashless filter paper with a medium-to-slow filtering rate. 

- Suitable for typical applications which includes gravimetric analysis for numerous components and for all kind of pre-filtrations. 

- Used as a primary filter for separating solid matter from aqueous extracts, in tests for fat and oil in water, in general soil analysis, quantitative determination of sediments in milk, as well as in analytical grade clean-up filter for solutions prior to AA spectro-photometry. Suitable for finer precipitates such as hot barium sulphate.

DSL44 GRADE – Slow filtration

- A thinner version of DXS42 Grade but with a higher flow rate (twice as fast as DXS42 Grade). 

- Very fine particles but with lower ash weight per sample

DXS42 GRADE – Very slow filtration

- An ashless world standard filter for critical gravimetric analysis. With slow filtering rate and fine particle retention. 

- Typical analytical precipitates such as cold barium sulphate, lead sulphate, zinc and nickel sulphides, etc.