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Crystal Technologies

  • Qualitative Filter Papers, Ahlstrom 609

    Ahlstrom

    Ahlstrom’s qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still requires…

  • Glass Microfiber Filter Media, Grade 169

    Ahlstrom

    Ahlstrom binder-free glass filter papers are ideal for use in water and wastewater analysis, gravimetric analysis involving ignition of the sample and filtration of hot gases and liquids. They are recommended for use in environmental applications, biochemical testing, as pre-filters and as direct…

  • Qualitative Filter Papers, Ahlstrom 613

    Ahlstrom

    Ahlstrom’s qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still…

  • Grade 222 Filter Paper Discs, 1.27cm

    Ahlstrom

  • Pleated (Fluted) Filter Paper, #509

    Ahlstrom

    Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials to grades with tight matrices for removal of fine precipitates. Ahlstrom’s pre-pleated grades can save valuable time and maximize the efficiency of the…

  • Hardened Low Ash Paper, Grade 391

    Ahlstrom

    Low ash grades have intermediate ash content between qualitative grades and ashless grades. Grade 391 is slowly filtering and used for fine-grained precipitates such as barium sulfate, metastannic acid, and cuprous oxide. Retention of 2-3 microns.

  • Glass Microfiber Filters

    Ahlstrom

    100% pure borosilicate glass microfibers; contains no binders or additives High loading capacity Consistent uniformity and excellent weight repeatability Rapid flow rate Particle retention range: 0.7 - 3.1 µm Chemical and thermal resistance (up to 550°C) Long shelf life GRADE…

  • Quantitative Filter Papers, Ahlstrom 75 (Ashless)

    Ahlstrom

    Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid…

  • Quantitative Filter Papers, Ahlstrom 55 (Ashless)

    Ahlstrom

    Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid to…

  • ReliaPrep™ Glass Fiber Prefilters

    Ahlstrom

    Syringe filters for convenient filtration of small sample sizes through membranes. This glass microfiber syringe filter can be used as a pre-filter to remove interfering particulates before filtering a sample through a membrane.

  • Grade 542 Pleated (Fluted) Filter Paper

    Ahlstrom

    Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials to grades with tight matrices for removal of fine precipitates. Ahlstrom’s pre-pleated grades can save valuable time and maximize the efficiency…

  • Qualitative Filter Papers

    Ahlstrom

    Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Qualitative filter papers are often used in routine separation work that still…

  • Filter Papers for TCLP

    Ahlstrom

    Ahlstrom offers three microfiber glass grades for use in the toxicity characteristic leaching procedure (TCLP) as described in EPA Method 1311. Grade 193 – Low Metal TCLP Filter This grade has similar performance properties to Grade 151 and is made with acid-treated borosilicate glass…

  • Phase Separation Filter Paper

    Ahlstrom

    Ahlstrom 480 is a hydrophobic silicone-impregnated paper intended for phase separation.

  • ReliaPrep™ Cellulose Acetate Syringe Filters

    Ahlstrom

    Syringe filters for convenient filtration of small sample sizes through membranes. Cellulose acetate membranes are hydrophilic membranes that offer excellent flow rates. They are low protein-binding and provide superior chemical resistance to alcohols and oils. They are best used at a pH of 4-8 and…

  • Glass Microfiber Filters, Ahlstrom 161

    Ahlstrom

    Ahlstrom offers a full range of glass microfiber filters manufactured from 100% pure borosilicate glass. Because of their intrinsic properties, glass microfiber filters have wide applications in many areas of laboratory analysis, especially when fine filtration and high loading capacity is…

  • Pleated (Fluted) Filter Paper, Grade 562

    Ahlstrom

  • Filter Paper GR615 8X8In

    Ahlstrom

    Ahlstrom 615 has a rough surface and is used for filtering aluminum, ferric and magnesium hydroxides. It is also found in general construction filtration work and in the filtration of insoluble iron and ore. Filtration Speed Herzberg sec/100mls: 29 Loading Capacity: High

  • Pleated (Fluted) Filter Paper, Grade 519

    Ahlstrom

    Ahlstrom manufactures high quality analytical filter papers for use in specialty end use applications. These custom designed qualitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water. Ahlstrom specialty analytical filter papers include pleated and…

  • Pleated (Fluted) Filter Paper, Grade 542

    Ahlstrom

    Ahlstrom manufactures high quality analytical filter papers for use in specialty end use applications. These custom designed qualitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water. Ahlstrom specialty analytical filter papers include pleated and…

  • Quantitative Filter Papers, Ahlstrom 95 (Ashless)

    Ahlstrom

    Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid to…

  • Pre-Weighed Filters

    Ahlstrom

    Ahlstrom pre-weighed and pre-washed filters can save time and resources in your laboratory by providing a convenient solution for your suspended solids testing. Each filter is pre-washed and pre-weighed, following the STM 2540 procedures, and provided in an aluminum pan with the identified weight…

  • ReliaPrep™ Polyether Sulfone Syringe Filters

    Ahlstrom

    Syringe filters for convenient filtration of small sample sizes through membranes. Polyether sulfone membranes are hydrophilic membranes that offer excellent flow rates with low protein adsorption. The membranes are chemically inert, can be used at a pH of 1 to 13 and operating temperatures below…

  • Pleated (Fluted) Filter Paper, #515

    Ahlstrom

    Ahlstrom offers a full range of standard pleated grades that meet your needs from grades with rapid flow rates for filtration of viscous materials to grades with tight matrices for removal of fine precipitates. Ahlstrom’s pre-pleated grades can save valuable time and maximize the efficiency of the…

  • Hardened Low Ash Paper, Grade 392

    Ahlstrom

    Suitable for routine gravimetric analysis and typical preparation of samples for use in analysis involving instrumental techniques. Low ash grades have intermediate ash content between qualitative grades and ashless grades. Grade 392 is medium to slowly filtering and used for fast filtration…

  • Quantitative Filter Papers, Ahlstrom 94 (Ashless)

    Ahlstrom

    Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid to…

  • Regular Weight Non-Toxic Towels for Seed Testing

    Ahlstrom

    Non-Toxic Brown Towels for Seed Testing.

  • 7cm Qualitative Circle

    Ahlstrom

  • Quantitative Filter Papers, Ahlstrom 74 (Ashless)

    Ahlstrom

    Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid to…

  • Chromatography Blotting Paper

    Ahlstrom

  • Grade 615 Filter Paper 12.5cm

    Ahlstrom

    Qualitative wet-strengthened filter paper grades are manufactured for applications using in a system or apparatus that operates under pressure or vacuum conditions. They contain a small amount of chemically stable, insoluble binding resin which strengthens the natural fiber-to-fiber bonds under wet…

  • Qualitative Filter Papers, Grade 961, Wet-Strengthened

    Ahlstrom

    Qualitative analysis Low ash content 0.06% Untreated Consistent performance Wet-strengthened grades available Custom cut Bulk packaging For use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present.…

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