Filter aids
Cellulose materials used to coagulate precipitates and as a prefilter layer in funnels. Quantitative grade is used for filter aids except for ordinary clippings. Ashless.
Filter paper grade 390, green dot, quantitative, round filter
Slow filtration. These ashless filter papers are used for quantitative and gravimetric analyses as well as for pressure and vacuum filtration.
Filter paper, Grade 389, white spot, quantitative, circles
Medium speed filtration.Other formats and diameters are available on request.
Filter paper, Grade 389, white spot, quantitative, sheets
Medium speed filtration.Other formats and diameters are available on request.
Filter paper, Grade 392, red spot, quantitative, circles
Medium fast filtration.Other formats and diameters are available on request.
Filter paper, Grade 392, red spot, quantitative, sheets
Medium fast filtration.Other formats and diameters are available on request.
Filter paper, grade 41, quantitative, circles
Ashless. For filtration of coarse and gelatinous precipitates.
Filter paper, grade 41, quantitative, sheets
Ashless. For filtration of coarse and gelatinous precipitates.
Filter paper, grade 42
Circles. Quantitative. Ashless. For filtration of fine precipitates.
Filter paper, quantitative, Grade 388 - black spot, circles
Rapid filtration, coarse porosity.Other formats and diameters are available on request.
Filter paper, quantitative, Grade 388 - black spot, sheets
Rapid filtration, coarse porosity.Other formats and diameters are available on request.
Filter paper, quantitative, round filters, 589/1
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code blackRapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Filter paper, quantitative, round filters, 589/2
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code whiteMedium rapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Filter paper, quantitative, round filters, 589/3
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code blueSlow filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Filter paper, quantitative, round filters, 589/4
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code yellowMedium rapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Filter paper, quantitative, round filters, 589/5
Ashless filters, recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.Colour code redMedium rapid filtrationAcid-washed and rinsed with water to neutraliseFree of minerals and metallic ions, ideal for the detection of metallic ionsFor analytical applications, routine quantitative and /or gravimetric proceduresThese filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring
Filter Paper, round filters for sugar analysis, creped
Recommended for the clarifying filtration of beet extracts and juices prior to analysis. High filtration speed combined with high retention of particles.
Filter Paper, round filters for sugar analysis, smooth
Recommended for the clarifying filtration of beet extracts and juices prior to analysis. High filtration speed combined with high retention of particles.
Filter Papers, Grade 43, quantitative, round
Very low ash content (0.007 % ash concentration maximum)Intermediate particle retention rating of 16 µmHerzberg filtration speed of 155 sParticle collection between that of Grades 40 and 41
Filter Papers, Grade 44, quantitative, round
Accurate ash free dry mass measurementsFine nominal particle retention rating of 3 µmFiltration speed (Herzberg 995 s)Typical thickness of 180 µm
Filter Papers, Grade 54, quantitative, filter sheets
Acid treated for high wet-strength and chemical resistanceLarge nominal particle retention rating of 22 µmFast filtration speed (Herzberg filtration speed 39 s)High purity (0.015 % ash maximum)Compatible with Büchner funnel or Hirsch funnel applications
Filter Papers, Grade 54, quantitative, round filters
Acid treated for high wet-strength and chemical resistanceLarge nominal particle retention rating of 22 µmFast filtration speed (Herzberg filtration speed 39 s)High purity (0.015 % ash maximum)Compatible with Büchner funnel or Hirsch funnel applications
Filter Papers, Grade 540, quantitative, round
Acid-treated for high wet-strengthExtremely low ash content (0.006 % ash maximum)Nominal particle retention of 8 µmMedium flow rate (Herzberg filtration speed 200 s)High chemical resistance to strong acid and alkali suspensions
Filter Papers, Grade 541, quantitative, round filters
High wet-strengthHigh chemical resistance to strong acid and alkali suspensionsRetention of gelatinous precipitate22 µm nominal particle retention ratingFast flow rate (Herzberg filtration speed 34 s)Maximum of 0.006 % ash concentration
Filter Papers, Grade 541, quantitative, sheets
High wet-strengthHigh chemical resistance to strong acid and alkali suspensionsRetention of gelatinous precipitate22 µm nominal particle retention ratingFast flow rate (Herzberg filtration speed 34 s)Maximum of 0.006 % ash concentration
FilterPaper, quantitative, wet-strength, round filters
Hardened ashless filters, especially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.Acid-washed and rinsed with waterFree of minerals and metallic ions, ideal for the detection of trace metalsHigh wet strength, easy to scrape off or wash off precipitatesHigh resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40 % at 50 °C) and alkalis (up to 10 % at 20 °C)
Kieselguhr Filter Paper 287, round filters
Recommended for filtration of the finest semi-colloidal turbidities.For separation of very fine semi-colloidal turbidityClarification of extracts of soil suspensions, of milk serum, of starch solutions and sugar-containing solutions prior to polarimetry and refractometryFor retention of protein precipitates and slime particles from solutionsClarification of urine samples
LLG-Quantitative filter paper, circles, fast
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 20 to 25 µm.Most frequently used quantitative filterFor PbS, Ag2S, FeS, carbonatesAshless, equivalent white tape
LLG-Quantitative filter paper, circles, medium fast
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 5 to 8µm.For NH4MgPO4, CaC2O4, BaSO4Ashless, equivalent red tape
LLG-Quantitative filter paper, circles, slow
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 2 to 3 µm. For very fine precipitates and small particlesFor soil analysisFor BaSO4 (hot precipitate), PbSO4, Cu2O, ZnS, NiSAshless, equivalent blue tape
LLG-Quantitative filter paper, circles, very fast
Made from 100 % cellulose.Filtration speed according to DIN 53137.Capacity of separation according to DIN 53135.Pore size 15 to 20 µm.For coarse, high volume precipitatesFordeterminations according to the German Standard Methods for the examination of water, waste water and sludgeForFe(OH)2, Al(OH)3, NaSO4Ashless, equivalent black ribbon
Phase separators, 1PS
A silicone impregnated, water repellent paper which can be used to separate aqueous solutions from immiscible solvents. The aqueous phase is retained and the organic phase passes through. Will retain solid particles. Can be used either flat under suction not exceeding 70mm Hg or quadrant folded in a conical glass funnel. Supplied in box of 100 circles.Note: This paper contains a small quantity of tin complex catalyst. It is therefore not recommended for use when this complex may cause interference, e.g. with the use of dithizone (diphenylthiocarbazone) reagent.
Phase separators, Grade 480, folded filters
Hydrophobic, silicone-impregnated filter paper. Allows the aqueous phase of an emulsion or other mixture to be separated based on water affinity. Suitable for the analysis of dressings or sauces.
Phase separators, Grade 480, round filters
Hydrophobic, silicone-impregnated filter paper. Allows the aqueous phase of an emulsion or other mixture to be separated based on water affinity. Suitable for the analysis of dressings or sauces.
Quantitative filter paper, Grade 391 - blue spot, circles
Very slow filtration.Other formats and diameters are available on request.