Sample Filtration Articles
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Ventilation – Inspecting and Testing – Commercial and Industrial Buildings
Inspecting your Ventilation (HVAC) System “HVAC” refers to the system that supplies heating or air conditioning to the occupied spaces of the building—whether office, factory, warehouse or residence (HVAC stands for Heating, Ventilating, Air Conditioning). I want to focus on HVAC systems in commercial buildings. No matter what type of air filtration is used in the system, it ...
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Getting the Design Right for a Reliable CO Mill Fire Monitoring System
Potential coal fires and coal-induced explosions in a coal handling system pose serious safety concerns for any industry that is using pulverized coal. Spontaneous combustion of coal in a coal handling system (coal conveyors, coal mills, coal silos, coal bunkers) has long been recognized as a fire hazard. Coal fires usually start in hotspots when coal absorbs oxygen from the air, heat generated ...
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A Major Municipal Laboratory Reduces FOG Measurement Time from 24 Hours to 10 Minutes with Infrared Analysis
A Major Municipal Laboratory's analysts regularly perform Fats, Oil and Grease (FOG) measurements on wastewater samples from various industrial plants and apartment buildings. In the past, these measurements were all performed with Environmental Protection Agency (EPA) Method 1664B, which requires about 20 minutes of handling time per sample and 24 hours total to produce results. “A few ...
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Microplastics Found in Colorado Rain
Surprise discovery raises questions about how much plastic is present in rain, and how it got there If all the recent news about global plastics pollution hasn’t been alarming enough, scientist Greg Wetherbee of the United States Geological Survey (USGS) recently — and unexpectedly — found plastic in the rain while researching an unrelated question. Although the rain samples ...
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Aerial Radiation Detection - US Nuclear Corp
In this time of multiple threats to our security: dirty bomb; cyber; shooters in public places; homemade bombs; misinformation; etc. we feel extremely vulnerable; perhaps more vulnerable than ever before. With the advent of Drone technology now available to private citizens, the technology previously only held by the military, the opportunity has come to merge Drone Technology with aerial ...
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Hard to Find Filter Configurations
Announcing New Hard to Find Filters Filters have been the go-to method for sampling air in determining particulate contamination. Before I get into the “hard to find” filters, let us talk about filtration. The ideal filter should: be able to capture “everything” down to the nanometer; never plug; be free of the substance that you are measuring, down to nanograms; ...
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Considerations when Purchasing a Near-Infrared Spectrometer
Understanding the Principles of NIR Spectroscopy Near-infrared (NIR) spectrometers measure the absorption or reflection of infrared light in the wavelength range 700 nm to 2500 nm (14,300 cm-1 to 4000 cm-1). For most applications, the range 1000 nm to 2500 nm (10,000 cm-1 to 4000 cm-1) is most useful; overtone and combination vibrations involving X-H bonds, (where is X is most often C, N, or O), ...
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Quit wasting time in wastewater filtration
Susan takes pride in the work she does each day. After all, without her expertise in the lab, the plants and animals that live in and around her community’s waterways could suffer. Susan is a Lab Manager at a wastewater treatment plant working in a specialized laboratory that tests wastewater samples, or effluent, which originates from industrial plants or domestic sewage. The sample ...
By Cytiva
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Siloxane Monitor Installed
STS have now completed the installation and commissioning of the first Siloxane Monitoring unit for Southern Water /Clarke Energy at the Millbrook Waste Water Treatment Works. The monitor has been set up to measure the raw input from the gas boosters into the filter system and then the 2 outputs from the twin filters. The flexibility of the filter arrangement means that they can be run in ...
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Pool water quality and prevalence of microbes in filter backwash from metro-Atlanta swimming pools
During the 2012 summer swim season, aquatic venue data and filter backwash samples were collected from 127 metro-Atlanta pools. Last-recorded water chemistry measures indicated 98% (157/161) of samples were from pools with ≥1 mg/L residual chlorine without stabilized chlorine or ≥2 mg/L with stabilized chlorine and 89% (144/161) had pH readings 7.2–7.8. These water quality parameters are ...
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Seminar on Capillary Electrophoresis for the determination of inorganic cations and anions in Thailand demonstrates the benefits of CE method
In the beginning of October, Lumex Instruments held the hands-on training on Capillary Electrophoresis (CE) in Thailand for our users and potential clients. This event was organized together with our distributor CE Combination and involved presentation of CE method and demonstration of Lumex Instruments CE system Capel-205. After the theoretical introduction, our chemical engineer performed ...
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Pilot of BACTcontrol at Aigües de Barcelona - Case Study
MicroLAN just started (Febr. 2017) to work under WP10 of Aquavalens with Aigües de Barcelona and CETaqua. This WP aims to obtain data on the occurrence of waterborne pathogens in different water types and implement and test the microbiological methods and tools for risk management in large water systems. The team consists of: Claudia Puigdomenech Serra David Baquero Gonzalez Arnau Pla ...
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Identification of nontuberculous mycobacteria isolated from hospital water by sequence analysis of the hsp65 and 16S rRNA genes
Nontuberculous mycobacteria (NTM) have emerged as an important cause of opportunistic nosocomial infections. NTM has frequently been isolated from hospital water distribution systems. The aim of this study was to survey the risk of NTM infections and determine the prevalence of NTM species in the hospital water distribution systems in Tabriz, Iran. One hundred and twenty samples of water from ...
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HPLC prep - which filter fits your chromatography sample best?
Sample filtration protects your HPLC column and preserves data quality. Read our tips on filter and solvent selection and the use of tools to save time in HPLC prep, improve lab efficiency, and better your analytical chemistry techniques. Filtering samples prior to high-performance liquid chromatography (HPLC) analysis can help avoid frit clogging while maintaining data quality. Adding a ...
By Cytiva
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Detection of Giardia intestinalis in water samples collected from natural water reservoirs and wells in northern and north-eastern Poland using LAMP, real-time PCR and nested PCR
Giardia intestinalis is a protozoan parasite, transmitted to humans and animals by the faecal–oral route, mainly through contaminated water and food. Knowledge about the distribution of this parasite in surface water in Poland is fragmentary and incomplete. Accordingly, 36 environmental water samples taken from surface water reservoirs and wells were collected in Pomerania and ...
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Focus On Microfiltration Part 1: Filter Longevity
For consumers using disk, syringe, and capsule filters it is a common FAQ: How long will my filter last? Or, to put it another way: How much fluid can I expect to pass through my filter before it clogs? This seems to be a simple and reasonable question for a filter consumer: Would any of us purchase a product without an understanding of its service life? However, this apparently simple question ...
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What’s Hiding in the Water?
As we grow in understanding the significance different organisms have in the ecology of an environment, it helps tremendously if we knowwhich organismsinhabit that environment – whether they’re supposed to be there or not. One method that is gaining widespread use, and relies on a simple filtration method, is the analysis of environmental DNA (eDNA) from local waterways. As ...
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qPCR detection versus microscopy observations for assessing presence–absence of Didymosphenia geminata in Quebec rivers (Canada)
Microscopic versus qPCR (quantitative polymerase chain reaction) analyses were compared for the detection of Didymosphenia geminata in biofilms and water filtrates from seven Gaspésie rivers (Canada). For the qPCR approach, two DNA extraction kits (QIAamp DNA Micro Kit, Qiagen and PowerSoil DNA Isolation Kit, Mo Bio Laboratories) and two pairs of primers were considered. The pair of primers ...
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[Technical Paper] Biomass Evolution in Full-Scale Drinking Water Filters
After nearly two-years of work, we could advance our understanding of ATP measurement in drinking water biofilters. I will describe some of the background and key results from the study below – more information is provided in the Journal AWWA December 2016 article. Background of the Study. Amina Stoddart, a PhD student at our Water Studies lab at Dalhousie, led a project that collected ...
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The Clog Blog
Clogging and over pressuring are definitely problematic for Liquid Chromatography columns. Back in 2005 John Dolan’s sage advice to chromatographers to make an LC column last forever was simple, “Never open the box!” As John pointed out, this is not practical and I have to agree. But as an LC column manufacturer I have seen remarks from customers regarding clogging as though it ...
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