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Whatman
Puradisc Syringe Filters-Puradisc 13 PES Sterile
Puradisc syringe filters combine premium quality and economy.
They are used for the quick, efficient filtration of samples up to 100 mL volume.
Puradisc filters are produced from pigment-free polypropylene or polycarbonate with standard inlet (female luer lock) and outlet (male luer) connections (unless otherwise stated).
Options include a sterile, medical-grade blister pack for critical applications and a special tube tip outlet that allows the sample to be accurately
Dispensed into a micro-vial, removing air lock.
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Whatman
Chromatography Papers-Grade 1 CHR
Whatman chromatography paper media are made from specially selected cotton cellulose.
They are rigorously quality controlled for characteristics important to the chromatographer and to ensure uniformity within
the grade.Features and benefits
• Pure cellulose produced entirely from the highest quality cotton linters
with no additives of any kind
• Manufactured and tested specifically for chromatographic techniques –
this ensures the wicking capability and uniformity of capillary action that
are important in chemical separations
• Also widely used in protein and nucleic acid blottingSKU: n/a -
Whatman
Extraction Thimbles-HP Cellulose Extraction Thimbles
Cellulose extraction thimbles are produced from high-quality alpha cellulose cotton
linter and have excellent mechanical strength and retention.
Standard single thickness thimbles have a wall thickness of approximately 1 mm
(10.0 μm nominal particle retention).SKU: n/a -
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Whatman
Lens Cleaning Tissue
Lenses and other optical surfaces made from glass, quartz or plastic can be easily
scratched if you do not clean them with a very soft surface.High-quality Whatman
lens cleaning tissue provides the solution. The tissue is chemically pure and free
from silicones and other additives.Most importantly, it can be relied on to safely remove surface moisture and grease.
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Whatman
Glass Microfiber Filters-Binder Free Glass Microfiber Filters-Grade GF/A (1.6 μm)
Grade GF/C: 1.2 μm*
Combines fine particle retention with good flow rate.
The standard filter in many
parts of the world for the collection of suspended solids in potable water and natural
and industrial wastes.Fast and efficient clarification of aqueous liquids containing
low to medium levels of fine particulates.Widely used for cell harvesting, liquid scintillation counting, and binding assays where more loading capacity is required.
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Whatman
Glass Microfiber Filters-Binder Free Glass Microfiber Filters- Grade GF/A (1.6 μm)
Offers fine particle retention and high flow rate, as well as good loading capacity.
Used for high-efficiency general purpose laboratory filtration, including water pollution monitoring of effluents, for filtration of water, algae and bacteria cultures, food stuff analyses, protein filtration, and radioimmunoassay of weak ß emitters.
Recommended for gravimetric determination of airborne particulates, stack sampling, and absorption
methods of air pollution monitoring.SKU: n/a -
Whatman
Quantitative Filter paper-Grade 541: 22μm
Quantitative filter papers –
Hardened ashless grades
Hardened ashless filter papers are suited for a variety of precipitate sizes.Along with general filtration
Grade 540, the range includes Grade 542 for retention of fine precipitates and Grade 541 for fast filtration.All three grades are designed for use in gravimetric analysis.
These filter papers exhibit high wet strength and chemical resistance and are acid hardened, which reduces
ash to an extremely low level. Their tough surfaces make them suitable for a wide range of critical analytical
filtration operations.Each grade offers a convenient combination of filtration speed and particle retention.
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Whatman
Quantitative Filter Paper-Grade 540: 8 μm
Grade 540: 8 μm
A general purpose hardened ashless filter paper with medium retention and flow rate.
Extremely pure and strong with a hard surface. High chemical resistance to strong acid and alkali.Frequently used in the gravimetric analysis of metals in acid/alkali solutions
and in collecting hydroxides after precipitation by strong alkalis.SKU: n/a -
Whatman
Quantitative Filter Papers-Grade Grade 50: 2.7μm
Grade 50: 2.7 μm*
Retention of very fine crystalline precipitates.The thinnest of all Whatman filter papers with a slow flow rate, these filters have a hardened and highly glazed surface, which also keeps the paper free from loose surface fibers.
Highly suitable for
qualitative or quantitative filtrations requiring vacuum assistance on Büchner
or 3-piece filter funnels.Very strong when wet and will withstand wet handling and
precipitate removal by scraping.In the electronics industry, the virtual absence of
fiber shedding is utilized in carriers for integrated circuits.This grade is also available in Smear Tab format for wipe testing (e.g. testing of
surfaces for radionuclide contamination).SKU: n/a -
Whatman
Quantitative Filter Papers-Grade 43: 16μm
Grade 43: 16 μm*
Intermediate in retention between Grades 40 and 41, and twice as fast as Grade 40.Typical applications include foodstuffs analysis, soil analysis, particle collection in
air pollution monitoring for subsequent analysis by XRF techniques, and inorganic
analysis in the construction, mining, and steel industries.SKU: n/a -
Whatman
Quantitative Filter Papers-Grade 42: 2.5μm
Grade 42: 2.5 μm*(Ashless Grades)
Used for critical gravimetric analysis with the finest particle retention of all
Whatman cellulose filter papers.Typical analytical precipitates include barium sulfate, metastannic acid, and finely precipitated calcium carbonate.
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Whatman
Quantitative Filter Papers-Grade 41: 20μm
Grade 41: 20 μm*
The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g. iron or aluminum hydroxides).Also used in quantitative air pollution analysis as a paper tape for impregnation when
determining gaseous compounds at high flow rates.SKU: n/a
