filter holder Articles
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Rocker`s Magnetic Lab Filter Holder Makes Your Job Easier
Many of our customers are running multiple tests simultaneously. Their bench tops are covered in manifolds, tubing, flasks, and a pump; space is limited. Test results need to be recorded. Membranes need to be changed. Funnels need to be refilled with solution. Time to repeat. Rocker’s magnetic filter holder is a simple but work-changing innovation.Its single hand operation allows quick, ...
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Focus on Microfiltration Part 3: Extending Service Life Using Prefiltration
Last month we examined filter selection strategies for maximizing service life in continuous use applications. In this 3rd installment, we will examine the use of prefilters to extend service life. Clarifying liquids with high levels of suspended solids is challenging, especially for applications requiring submicron filtration. In these applications, filter users who experience frustratingly ...
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Water Technology magazine article by ITS president
First, we should note that the current attention is not due to water, air or soil contamination, but from lead contamination recently found in toys and children’s jewelry made in China. This is very frightening for any parent because of the harm lead can to cause in children. How could this happen? How concerned should you and your customers be about lead? In view of this heightened ...
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Lead (Pb) in Workplace Air by Niton 700 Series Field Portable X-Ray Fluorescence (XRF) Analyzer
Procedure: Air samples are collected by drawing workplace air, using personal sampling pumps, through 37-mm mixed cellulose ester (MCE) filters mounted in polystyrene cassettes. Samples are prepared for XRF analyses by transferring each filter, along with the support pad, to a special air filter sample holder, specifically designed for a Niton XRF analyzer. Three separate 60-second readings are ...
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Custom Engineering and Design Capability
ANSI N13.1-2011 stack sampling location qualification testing ANSI N13.1 stack sampling system design Custom air sampler design Integration of radiation detectors and air sampling systems ANSI N13.1-2011 Design Considerations ANSI N13.1-2011 requires that sampling systems satisfy the following design criteria; (1) representative particles from the stack flow must be drawn into the ...
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Upstream Particulate Removal for Rtos on Direct-Fired Osb Dryers – How much is enough?
Abstract Since 1994 Regenerative Thermal Oxidizers (RTOs) have been applied to direct wood-fired OSB dryers for the purpose of VOC abatement. In early direct wood-fired OSB dryer applications many OSB producers felt that upstream particulate control was not necessary. However, the ash from the combustion of wood waste created a host of new operational problems for the RTO systems. This paper ...
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Getting the lead out — at the faucet
You might be surprised at where you’ll find a customer’s lead. Lead is making headlines. First, we should note that the current attention is not due to water, air or soil contamination, but from lead contamination recently found in toys and children’s jewelry made in China. This is very frightening for any parent because of the harm lead can to cause in children. How could this happen? ...
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Inside the Particulate Monitor – Filter Samplers
Some time ago, OPSIS published descriptions on how some well-established types of gas analysers work, namely those based on spectrometers, interferometers, and tuneable diode lasers. They all utilize absorption of light to determine the concentrations of gaseous pollutants such as nitrogen oxides (NOX), sulfur dioxide (SO2), hydrogen chloride (HCl), ammonia (NH3), and many more. The same ...
By OPSIS AB
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Why Does My Track-Etched Membrane have Waves?
Thin film track etched membranes, commonly referred to as polycarbonate (PCTE) and polyester (PET) filters, feature a unique pore structure and optical clarity unlike most filters. A complex, two step manufacturing process involving ion bombardment of the film followed by a chemical bath results in this attractive membrane exhibiting a smooth surface interrupted with the appearance of wrinkles, ...
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Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures
Untitled Document Background The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA's Regional Superfund Offices, organized to exchange information related to ground-water remediation at Superfund sites. One of the major concerns of the Forum is the sampling of ground water to support site assessment and remedial performance ...
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