High purity cellulose extraction thimbles as sample reservoirs for Soxhlet extractions. Walls are approximately 1.5 mm thick and have been found to perform satisfactorily in applications requiring either a single or double wall thickness.
Glass thimbles are used to sample dust particles and aerosols from gaseous streams in the analytical registration of environmental pollution and for Soxhlet extractions requiring solvents too aggressive for cellulose thimbles. Maximum operating temperature of 500 decrees Celsius.
Quartz thimbles are used for emission testing in high temperature environments. Maximum operating temperature of 900 degrees Celsius.
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 an operating temperature below 180 degrees Celsius.
Ahlstrom Grade 222 is a 100% cotton medium thick chromatography paper with a smooth and uniform texture. It offers extremely high flow and is recommended for both electrophoresis of large molecules and as a blotter to complete the blotting sandwich in gel transfer applications. Thickness: 0.83 mm. Absorption speed: 220 mm / 30 min.
Ahlstrom manufactures a complete line of high quality
chromatography electrophoresis and blotting papers
for use in gel transfer applications and chromatography
techniques. These uniform smooth white sheets are the
high purity high quality and high value standard. They are
used in nucleic acid research such as Southern Northern and
Western blots electroblotting and electrophoresis. Ahlstrom
chromatography electrophoresis and blotting papers are
made from high purity and 100% FDA compliant alpha
cotton cellulose using ultra-pure RO water and contain no
additives that could cause increased backgrounds or other
interference in detection systems.
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 required.
Applications for Ahlstrom glass microfiber filters include
environmental analysis for water wastewater testing of
soils air pollution and monitoring research and process
biochemistry and gravimetric analysis involving ignition of
samples. Ahlstrom glass microfiber filters are also found in
the filtration of hot gases and liquids and in pre-filtration.
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 high purity and
Ahlstrom offers a complete range of low ash filter papers for
general laboratory work that provides you with the correct
combination of particle retention filtration speed loading
capacity and wet-strength. All our qualitative grades consist
of > 95% super refined α-cellulose and linter fibers.
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 remove any remaining organic and inorganic impurities. All quantitative grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter.
Cellulose acetate Nylon. Grided and other membranes are available. These membranes that offer excellent flow rates. They are low protein-binding and provide superior chemical resistance to alcohols and oils. They can be used at a wide ranging pH and an operating temperature below 180 degrees Celsius.
Ahlstrom’s micro-quartz filters are useful for testing hot “stack” gases as the quartz fibers
can withstand temperatures up to 900°C. In addition micro-quartz is used when the highest
purity media is required. With excellent filtration properties and minimal traces of metals
and minerals quartz fibers are dimensionally stable and can be used in the analysis of
acidic gases (with the exception of HF). Other sizes available for special order. T293 also
available for special order.
Ahlstrom offers specialty products for the scientific
industry. Many products were designed alongside the
researchers doing test development in order to provide the
necessary performance characteristics.
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 non-pleated grades and are found in applications such as seed asphalt and beer testing. All grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter.