Whatman Filter Paper

kertas filterDescription GE Whatman Grade 541 Hardened Ashless Filter Paper Circles 22µmGE’s Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration.High wet-strengthHigh chemical resistance to strong acid and alkali suspensionsRetention of gelatinous precipitateFast flow rate (Herzberg filtration speed 34 s)Maximum of 0.006% ash concentrationSpecifications Material: High-Quality Cotton LintersGrade: 541Filter Paper Type: QuantitativeFlow Rate: 3.8s/100mL/in2Particle Retention: 22umPackaging: 100 per Pack

Nuclepore track-etched polycarbonate membranes are manufactured from high-quality polycarbonate film and have sharply defined pore sizes, high flow rates, and excellent chemical and thermal resistance. The membranes have a smooth flat surface and exhibit very low levels of extractables. SpecificationFeaturesSpecification Nuclepore Track-Etched Polycarbonate Gold-Coated Membrane, circle, 0.4 µm pore size, 25 mmComplete Packsize50 PiecesMaterialNuclepore Polycarbonate 

Adsorbable organic halogens (AOX) are organic compounds containing halides such as chlorine, bromine, or iodine. Some of these compounds are toxic to humans and marine life. Like mercury, AOX can concentrate up the food chain.Specified by ISO 9562 (and EPA 1650 in the US), AOX analysis measures the quantity of halides present in water samples. The Nuclepore AOX analysis filter meets the specifications for a filter per these methods. SpecificationFeaturesSpecification Nuclepore Track-Etched Polycarbonate AOX Membrane, 0.4 µm pore size, 25 mm circle (100 pcs)Complete Packsize100 PiecesMaterialNuclepore PolycarbonatePore Size0.4 µm

Effective chemotaxis requires a delicate balance between cell adhesion and migration. This Whatman Nuclepore membrane filter from GE Healthcare’s Life Sciences business combines PVP-free polypropylene with sharp, uniform cylindrical pores to achieve both.Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis. SpecificationFeaturesSpecification PVP-Free Polycarbonate Cell Culture Membrane, 5.0 µm pore size, 13 mm circle (100 pcs)Complete Packsize100 PiecesMaterialPolycarbonate (PC)Pore Size5 µm  

Effective chemotaxis requires a delicate balance between cell adhesion and migration. This Whatman Nuclepore membrane filter from GE Healthcare’s Life Sciences business combines PVP-free polypropylene with sharp, uniform cylindrical pores to achieve both.Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis. SpecificationFeaturesSpecification PVP-Free Polycarbonate Cell Culture Membrane, 5.0 µm pore size, 13 mm circle (100 pcs)Complete Packsize100 PiecesMaterialPolycarbonate (PC)Pore Size5 µm

Whatman Cyclopore track-etched membrane filters are appropriate for a wide variety of analytical procedures such as densitometry, gravimetric analysis, and emission spectroscopy.Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis. SpecificationFeaturesSpecification Cyclopore Polycarbonate Thin Clear Membrane, 1.0 µm pore size, 47 mm circle (100 pcs)Ash Weight0.6 µg/cm2Autoclavable30 min at 121°CBiological CompatibilityInertComplete Packsize100 PiecesFiber ReleasingNoFlammabilitySlow burnLeachablesNegligibleMaterialPolycarbonate (PC)OpacityTranslucentOperating Temp. Max.140°CPore Density Max.6 x 108 pores/cm2Pore Density Min.105 pores/cm2Pore Size1 µmPorosity [Void Volume] Max.20%Porosity [Void Volume] Min.4%Specific Gravity1.21 g/cm2Weight Max.2.0 mg/cm2Weight Min.0.7 mg/cm2

GE Healthcare’s Life Sciences business offers a variety of Whatman PCTE membrane filters for gravimetric analyses. Browse the range of Whatman track-etched membranes to find other Cyclopore membranes and Nuclepore application-specific membranes for organic halide adsorption and electron microscopy.High visibility black membrane filter for epifluorescenceBecause of their low background fluorescence, microfiltration membranes with a dark surface can improve test sensitivity in epifluorescence. Cyclopore black membrane filters offer a consistent contrasting background for excellent visibility during particle analysis.Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis.  SpecificationFeaturesSpecification Cyclopore Polycarbonate Black Membrane, 0.2 µm pore size, 25 mm circle (100 pcs)Ash Weight20.6 µg/cm2Autoclavable30 min at 121°CBiological CompatibilityInertColorBlackComplete Packsize100 PiecesFiber ReleasingNoFlammabilitySlow burnLeachablesNegligibleMaterialPolycarbonate (PC)Operating Temp. Max.140°CPore Density Max.6 x 108 pores/cm2Pore Density Min.1 x 105 pores/cm2Porosity Max.13%Weight Max.2.0 mg/cm2Weight Min.0.7 mg/cm2 

GE Healthcare’s Life Sciences business offers a variety of Whatman track-etched membranes. Cyclopore comes in clear and black colors. Nuclepore track-etched membrane options are available for organic halide adsorption, electron microscopy, and other specific applications.Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis.  SpecificationFeaturesSpecification Cyclopore Polycarbonate Membrane, 0.4 µm pore size, 13 mm circle (100 pcs)Ash Weight0.6 µg/cm2Autoclavable30 min at 121°CBiological CompatibilityInertComplete Packsize100 PiecesFiber ReleasingNoFlammabilitySlow burnLeachablesNegligibleMaterialPolycarbonate (PC)OpacityTranslucentOperating Temp. Max.140°CPore Density Max.6 x 108 pores/cm2Pore Density Min.105 pores/cm2Porosity [Void Volume] Max.20%Porosity [Void Volume] Min.4%Specific Gravity1.21 g/cm2Weight Max.2.0 mg/cm2Weight Min.0.7 mg/cm2 

GE’s clear Whatman polycarbonate membrane filters are made from a pure polymeric film that provides exceptional chemical cleanliness during microfiltration, as well as high visibility under the microscope.Contaminant free to minimize chemical leachingLow tare weight and minimal water adsorptionSmooth, flat membrane ensures particles remain on the surface for visibility GE Healthcare’s Life Sciences business offers a variety of Whatman track-etched membranes. Cyclopore comes in clear and black colors. Nuclepore track-etched membrane options are available for organic halide adsorption, electron microscopy, and other specific applications.Clear membrane filters for microscopic visibilityDark particles viewed under a microscope are easier to see when they are on a smooth, clear membrane. The translucent nature of Whatman polycarbonate membrane filters from GE makes them suitable for applications that require viewing of dark particles after microfiltration. Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis.  SpecificationFeaturesSpecification Cyclopore Polycarbonate Clear Membrane, 5.0 µm pore size, 25 mm circle (100 pcs)Ash Weight0.6 µg/cm2Autoclavable30 min at 121°CBiological CompatibilityInertComplete Packsize100 PiecesFiber ReleasingNoFlammabilitySlow burnHydrophilicYesLeachablesNegligibleMaterialPolycarbonate (PC)OpacityTranslucentOperating Temp. Max.140°CPore Density Max.6 x 108 pores/cm2Pore Density Min.105 pores/cm2Pore Size5 µmPorosity [Void Volume] Max.20%Porosity [Void Volume] Min.4%Specific Gravity1.21 g/cm2Weight Max.2.0 mg/cm2Weight Min.0.7 mg/cm2 

Sterile Mixed Cellulose Ester Membranes, 3 µmWhatman mixed cellulose ester membranes are composed of cellulose acetate and cellulose nitrate. These membranes are characterized by a smoother and more uniform surface than pure nitrocellulose filters. Also, the color contrast provided by the filter surface facilitates particle detection and minimizes eye fatigue. The ME range has a lower cellulose acetate content compared to the WME range of membranes.Specification Mixed Cellulose Ester Circle ME Range (ME 29), plain, sterile, 3 µm pore size, 50 mmAir Flow Rate [Delta p equals 3 mbar]6.7 s/100 mlAutoclavableYesComplete Packsize100 PiecesDiameter50 mmInterleaving PaperYesMaterialMixed Cellulose Ester (MCE)Membrane TypeME 29Operating Temp. Max.130°CPore Size3 µmPorosity Max.77%Porosity Min.74%Protein BindingMediumSolvent ResistanceMediumSterilitySterileWater Flow Rate [Delta p equals 0.9 bar]1.2 s/100 ml/12.5 cm2Weight Max.5.0 mg/cm2Weight Min.4.3 mg/cm2   FeaturesProduct code: 10400772 Mixed cellulose ester membrane, ME 29, circle, plain, sterile, 3 µm, 50 mmSterile options available for critical applications.Excellent contrast for easier particle detection.Grids are nontoxic and do not inhibit bacterial growth, ensuring sample integrity.Black plain and black gridded membranes have a mix of cellulose nitrate and cellulose acetate.The membrane offers a high degree of internal surface area for greater adsorption of product.Higher dirt loading capacity.Biologically inert with good thermal stability.No surfactants to contaminate samples.Uniform microporous structure of membrane gives high flow rates.