Glass Fibre Filters – with binders Brochure

20 www.hahnemuehle.comGlass fibre filters – with bindersRecommended filters for environmental analysis and controlling both air and water pollution.Made of 100 % borosilicate glass fibres ?with bindersGlass fibre filters capture fine particles ?down to 1 µm from liquids, in air, gases and aerosols with even 0.3 – 0.5 µm being absorbedThe large surface area (approx. 2m ? ²/g) provides an outstanding retention capacityExtremely low content in alkali-earth ?metalsChemical stability: It keeps all its proper- ?ties in contact with acid solutions (except hydrofluoric acid) and basic solutions at moderate concentrationsStability at high temperatures: It keeps its ?properties up to 500 ºC, and 180 ºC for GF 10High flow speed and high permeability to ?airUsable as a pre-filter for membranes to ?prevent the membranes from silting up (GF 9 replaces the former grade GF 92)Technical specifications LabScienceALBETGrade BinderRetention rate %NaCl-particle size <1 µm*FiltrationGurley [s]Weight [g/m²]Thickness [mm]Max T [ºC]GF 6 inorg. 99,97 40 80 0.35 500GF 8 inorg. 99 12 75 0.35 500GF 9 inorg. 99,97 27 70 0.35 500GF 10 org. 99,97 12 70 0.35 180GF 3362 inorg. 99,99 34 130 0,5 500* Tested with NaCl particles size <1 µm, main fraction at 0.3 to 0.5 umNotes for handlingWeight consistency: No relevant changes in weight due to variations in the ambient humidity.Limited bending resistance. Brushing against other surfaces may cause the loss of fibres (keep the filters in their original box until their use).Ordering informationTypes GF 6, GF 8, GF 9, GF 10 and GF 3362 are available as filter circles with the following sizes as standard (in mm): 25 – 37 – 42,5 – 47 – 55 – 70 – 90 – 110 – 125 – 150. The product reference is structured as described on page 63. Other sizes, sheets, rolls and special cuts are available on request.Did you know that all of our filter papers are “Made in Germany”?www.hahnemuehle.com 21ApplicationsGrade GF 6Deposition of (radioactive) aerosols and monitoring of nuclear power plants ?Gravimetrical analysis of organic and inorganic impurities in water and waste water according to ?DIN 38409Measurement of scintillation ?Determination of chlorophyll and phytoplankton residues ?Removal of proteins in beer samples prior to analysis ?Grade GF 8 and GF 9Measurement of immission, measurement of dust in air and gases, monitoring of the efficiency of filtration ?and dedusting, monitoring the combustion air of power plants and of the steel and iron industryMeasurement of dust release in workplace and production processes and the purification of compartment ?airMeasurement of the proportion of dust particles in technical gases ?GF9 can be used as membrane pre-filter, it offers the same performance as the formerly used grade GF 92 ?Grade GF 10Due to the high mechanical stability it is used as a roll filter in automatic air filter units and air analysers ?Deposition and measurement of soot ?Grade GF 3362Due to its higher thickness and higher density it is used as a roll filter in automatic air filter units and air ?analysersDeposition of soot prior to measurements in gas analysers ?Measurement of immision ?22 www.hahnemuehle.comGlass fibre filters – without bindersRecommended filters for controlling both air and water pollution.Made of 100% borosilicate glass fibres ?without bindersGlass fibre filters absorb the finest ?particles down to 1 µm from liquids, in air, gases and even aerosols with 0.3 – 0.5 µm are separatedThe large surface area (about 2m²/g) ?provides an outstanding retention capacityExtremely low content in metals ?Chemical stability: It keeps all its proper- ?ties in contact with acid solutions (except hydrofluoric acid) and/or basic solutions at moderate concentrationsStability at high temperatures: It keeps its ?properties up to 500 ºCHigh flow speed and high permeability ?to airUsable as pre-filter for membranes to ?prevent the membranes from silting u pTechnical specifications LabScienceALBETGradeAir permeability * [L/m2s]Retention rate % NaCl-particle size <1 µm ***Filtration Gurley [s]Weight [g/m²]Thickness [mm]Max T [ºC]GF 50 33 99,993 19 56 0.29 500GF 51 11 99,993 44 140 1.00 500GF 52 54 ** 99,995 25 54 0.28 500GF 53 18 ** 99,999 10 120 0.53 500GF 55 <10 99,999 67 75 0.40 500* According DIN 53887 ** Air resistance in mbar at 400 cm³/s, A= 10 cm² *** Tested with NaCl particles size <1 µm, main fraction at 0.3 to 0.5 µmNotes for handlingWeight consistency: no relevant changes in weight due to variations in the ambient humidity.Limited bending resistance. Brushing against other surfaces may cause the loss of fibres (keep the filters in their original box until their use).Ordering informationThe types GF 50, GF 51, GF 52, GF 53 and GF 55 are available as filter circles with the following sizes as standard (in mm): 25 – 37 – 42,5 – 47 – 55 – 70 – 90 – 110 – 125 – 142 – 150. The product reference is structured as described on page 63. Other sizes, sheets, rolls and special cuts are available on request.www.hahnemuehle.com 23ApplicationsGrade GF 50Immission and emission: routine and specialised atmospheric pollution controls ?Sampling of suspended particles <30 µm, according to directive 80/779/EEG, 15.7.1980 ?Emission control: Determination of particles, inorganic lead and other metals by isokinetic probe (up to ?500 ºC)Water pollution analysis: for total determination of suspended solids ?Algae and bacteria determination in water and sewage analysis ?Clearing solvents, buffer solutions and reagents that are used for the application of spectrophotometric ?techniquesBiochemical issues like DNA, RNA, proteins and polysaccharides ?Grade GF 51Membrane pre-filter to prevent silting ?Clearing liquids for later analysis using instrumental techniques ?Concentrated suspended solids quantification, counting the fine particles ?Biochemical issues like DNA, RNA, proteins and polysaccharides ?Grade GF 52Determination of suspended solids in drinking water, sewage and industrial waste, based on European ?regulation UNE EN 872 and/or Standard Methods 2540 DControl and analysis of drinking water or sewage, including processes for clearing aqueous solutions with ?a low level of fine particlesBiochemical tests: analysis of carbohydrates, cell cultures, counting scintillation in liquids and links ?analysis, DNA, RNA, proteins and polysaccharidesClearing of Protein solutions prior to freeze-drying ?Protein precipitates collection, especially in analysis of terminal groups followed by counting of the scintil- ?lation in the filterCell cultures, for example in studies on incorporation ?Collecting fragments of membrane tissue in analysis of receptor links ?Grade GF 53Membrane pre-filter: high retention of particles ensures the correct clearing of the sample prior to passing ?through surface filters (membrane filters)Pre-filtration in pharmaceutical industry ?Filtration in food industry: Determination of the amount of insoluble contaminants in animal and vegetable ?fats and oils according to §64 LFBG para. 1 and 2*Grade GF 55Sample and solvent filtration for HPLC ?Biochemical tests: clarification and filtration of proteins, cell cultures, etc ?Gravimetric analysis of pigments ?Elimination of fine suspended carbon material in liquids to be filtered ?Electrolyte filtration used in particle size analysis ?* German law for food and utensilswww.hahnemuehle.com 25Quartz fibre filtersRecommended filters for atmospheric pollution control and for particles determination at high temperatures.Filters made of pure quartz microfibre (SiO ? 2), free of binding elements or additivesExtremely low content in alkali-earth metals ?Retention: excellent retention of very fine particles ?through the absorption mechanisms of quartz fibresAir permeability: extremely high. Able to pass ?through large volumes of airChemical stability: excellent stability with hardly ?any loss of filter-material due to chemical reactions under extreme conditions with acid gases (HCl, SO2, SO3, H2SO4, NO and NO3)Resistance to chemical reagents: excellent resis- ?tance to solvents, acids (except HF) and alkaline substancesStability at high temperatures: higher resistance ?than glass microfibre. Very good up to 1000 ºC; beyond this value it starts losing its normal propertiesTechnical specifications LabScienceALBETGradeWeight [g/m²]Thickness [mm]TSI efficacy % [particles 0,3 µm]Max T[°C]BinderQFH 85 0,45 99,999 1000 noTrace metals [ppm]Al: 110 Sb: < 1 Ba: < 100 Cd: < 1 Ca: 100 Cr: < 10Co: < 5 Cu: 50 Fe: 50 K: < 20 Mg: 20 Mn: < 10Na: 90 Ni: < 10 Pb: < 10 V: < 10 Zn: <1Detection limit 0.01 ppm.ApplicationsApplications that require a maximum filter purity with a low metal content and no carbon traces ?Filtration and analysis of both acid and alkaline gases and of solvents ?Immission: sampling and analysis of PM 10 and PM 2.5 particles and other pollutants ?Emission: pollution controls performed on air within industrial stacks, smoke ducts and aerosols ?Ordering informationThe type QFH is available as filter circles with the following sizes as standard (in mm): 25 – 37 – 42,5 – 47 – 55 – 70 – 90 – 110 – 125 – 142 – 150. The product reference is structured as described on page 63. The package size is 50 per box. Other sizes, sheets, rolls and special cuts are available on request.