HI-Q - Ashless Cellulose & Carbon Impregnated Filter Paper
Ashless Cellulose Filter Paper such as the Whatman 41 series is commonly used in quantitative analytical techniques such as gravimetric analysis. E.G.: To convert precipitate to a stable weighing form, a chemist may wish to ignite the filter paper containing collected precipitate in a pre-weighed crucible, thereby removing the filter paper with minimal and uniform residual 'ash'. Cellulose paper is also commonly used for smears or swipes. Cellulose paper is not recommended with pumps that can't overcome large pressure drops (e.g. battery operated centrifugal type) or, where required, to maintain a constant flow rate over the entire sampling period.
- FPAE-XX - Hydrophilic, Binderless, Glass Fiber Filter Paper.
This binderless, high efficiency (HEPA type), high purity, 100% high quality borosilicate glass micro fiber filter media is commonly used in the collection of alpha, beta, and gamma emitting particulate. Other common uses include gravimetric analysis of air pollutants and membrane prefilters. It is an excellent all around analytical grade filtration media for use in the removal of micron and submicron size particulates from both liquids and gases. Specifically designed for analytical applications. DOP Collection Efficiency 99.99%, HEPA Quality.
- FP2000-XX - Binderless, Ultra-Pure, Glass Fiber (Whatman EPM-2000)
The EPM-2000 grade paper was developed and produced especially for use in high volume PM-10 air sampling equipment that collects atmospheric particulates and aerosols. It is manufactured from 100% pure borosilicate glass of special purity enabling detailed chemical analysis of trace pollutants to take place with the minimum of interference or background. EPM-2000 was selected by the EPA to be the standard filter for use in the nationwide network of Hi-Vol air samplers. 8' x 10' sheets are individually numbered to facilitate identification.
- FP5211-XX - Hydrophilic, Laminated Glass Fiber Filter Paper with acrylic resin binder.
This hydrophilic, laminated glass fiber filter paper is a high efficiency multi-purpose filter medium with good heat resistance. It is particularly recommended for both gas and liquid filtration in medical and air monitoring applications. The base material consists of 100% high quality borosilicate glass microfibers with a 3-7% acrylic resin binder. The supporting scrim maintains the integrity of the glass fibers under flow stress compaction. The scrim can be applied to either side depending on the filter design. The scrim is bonded to the glass media using a polyester hot melt which has a melting point of 325° F. DOP Collection Efficiency 99.99%, HEPA Quality.
- FP1441-XX - Whatman, Grade 41: 20-25µm.
The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (i.e., iron or aluminum-hydroxides). Also used in quantitative air pollution analysis. Cellulose paper is also commonly used for smears or swipes.
- FPACI-XX - Carbon Impregnated Filter Media.
Carbon impregnated cotton fiber filter media contains 50-55% Carbon by weight. Basic Weight is 130 lbs./3000 ft2. The paper is available in all standard die sizes and is generally used to qualitatively determine the presence of Iodine in a sampling environment. The paper resists most dilute acids (not suitable for warm alkaline solutions).
- TEFLON-GSKT-XX - Teflon Support Gaskets.
Teflon Support Gaskets may be placed above and below the filter paper disc creating a protective barrier between the occasional sharp edges of filter paper holder support screens and retaining rings. The inner & outer diameters of the Teflon rings are punched to a specifically tight tolerance to minimize any flow disturbance and to maximize filter collection media face exposure. Punched Teflon thickness is 0.020.