Description
Specifications Table
Product Name – Whatman Grade QMA Quartz Microfibre Filter
Quantity/Pack Size – 2.5CM (Pack of 100), 3.2CM (Pack of 100), 3.7CM (Pack of 100), 4.5CM (Pack of 100), 4.7CM (Pack of 100), 5.0CM (Pack of 100), 5.5CM (Pack of 100), 8.26CM (Pack of 100), 8.5CM (Pack of 100), 9.0CM (Pack of 100), 10.16CM (Pack of 100), 11CM (Pack of 100), 11.8CM (Pack of 100), 15CM (Pack of 100), 8x10IN (Pack of 25), 8x10IN Numbered (Pack of 100), 8x10IN Sheets (Pack of 100)
Form – Circular discs, sheets
Grade – QMA (Quartz Microfibre, high-purity)
Application – High-temperature filtration, gravimetric analysis, air pollution monitoring
Product Overview
Whatman Grade QMA quartz microfibre filters are engineered for superior performance in high-temperature applications where standard cellulose or glass fibre filters fail. Composed of 100% pure quartz fibres, these filters exhibit exceptional thermal stability up to 1000?C, making them ideal for gravimetric analysis, stack sampling, and air pollution monitoring. The ultra-low ash content (<0.005%) ensures minimal interference in analytical results, while the chemically inert nature guarantees compatibility with aggressive acids and solvents. The uniform fibre structure provides high particle retention efficiency without compromising flow rates, delivering consistent filtration performance across diverse lab protocols. Available in multiple diameters and sheet formats, these filters accommodate various filtration setups from small-scale experiments to industrial monitoring. The binder-free construction eliminates potential contaminants, while the smooth surface facilitates easy handling and sample recovery. Whether used in environmental testing, pharmaceutical quality control, or materials research, Whatman QMA filters maintain structural integrity even under extreme conditions, ensuring reliable results in critical applications.
FAQs
1. What is the maximum operating temperature for Whatman QMA filters?
These quartz microfibre filters can withstand continuous operation at temperatures up to 1000?C without degradation, making them suitable for high-temperature gravimetric analysis and combustion processes.
2. How does the ash content of QMA filters compare to standard glass fibre filters?
The ash content of Whatman QMA filters is exceptionally low at <0.005%, significantly lower than typical glass fibre filters which often contain 0.5-5% ash, ensuring minimal interference in analytical measurements.
3. Can these filters be used with corrosive chemicals?
Yes, the pure quartz composition makes QMA filters highly resistant to most acids and solvents, including hydrofluoric acid, though prolonged exposure to strong alkalis should be avoided.
4. What particle retention rating do these filters have?
Whatman QMA filters typically retain particles larger than 0.6 microns, though actual retention depends on specific filtration conditions and particle characteristics.
5. How should these filters be stored to maintain their properties?
Store in original packaging in a clean, dry environment away from direct sunlight and chemical vapors to preserve the filters’ physical and chemical properties until use.
