water sample analysis Articles
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Analysis of Epichlorohydrin in Drinking Water by Purge and Trap GC/MS
Abstract Epichlorohydrin (ECH) is a versatile starting material in the production of drugs and polymers. It is also used as an insect fumigant and a solvent for organic synthesis reactions. ECH-based polymer pipes are widely employed in the production of drinking water. Due to its extreme reactivity and toxicity, many foreign nations have begun imposing limits on the amount of ECH allowable in ...
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New Membranes for Environmental, Pharma and Wider Applications
Summary: A new membrane that’s better for your application Choose Gold-coated polyester membranes for: Detecting and characterizing micro-plastics in environmental water samples. Particle analysis by SEM/EDX, FTIR microscopy and Raman spectroscopy. Identification and characterization of micro- and nanoparticles in pharmaceutical fluids and chemical auxiliary agents. Testing for ...
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Evaluation of
Legionella presence in the water system of a public building by semi-nested polymerase chain reaction as a rapid screening method complementary to plate countThe aim of this study was to apply a fast and efficient protocol for monitoring levels of Legionella contamination in high-risk water systems using molecular techniques and culture methods. Forty-nine water samples from a public building were analyzed by a culture method (BCYE agar) and a specific semi-nested polymerase chain reaction (PCR). The first 30 analyses using plate counts were ...
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Stability of pharmaceuticals and other polar organic compounds stored on polar organic chemical integrative samplers and solid‐phase extraction cartridges
The stability of 24 chemicals, including pharmaceuticals and personal care products, and some agrochemicals on extraction media was evaluated by preloading them onto Oasis hydrophilic lipophilic balanced solid‐phase extraction (SPE) cartridges and polar organic chemical integrative samplers (POCIS) followed by storage at −20°C over time. After 20 months, the average loss was 11% on POCIS, with ...
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USEPA Method 8260C using the Tekmar Atomx Automated VOC Sample Prep System and a Thermo Focus/DSQ II GCMS
Abstract The United States Environmental Protection Agency (USEPA) developed Method 8260 to determine the concentration of Volatile Organic Compounds (VOCs) in water and soil matrices. USEPA Methods 5030 and 50351 are used to prepare water, soil and waste samples for analysis by USEPA Method 8260. USEPA Method 8260 was recently updated from 8260B to 8260C2 . In this study water and soil sample ...
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USEPA Method 8260C using the Tekmar Atomx Automated VOC Sample Prep System and a Thermo Focus/DSQ™ II GCMS
Abstract The United States Environmental Protection Agency (USEPA) developed Method 8260 to determine the concentration of Volatile Organic Compounds (VOCs) in water and soil matrices. USEPA Methods 5030 and 50351 are used to prepare water, soil and waste samples for analysis by USEPA Method 8260. USEPA Method 8260 was recently updated from 8260B to 8260C2 . In this study water and soil sample ...
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Validation of Volatile Organic Compound by USEPA Method 8260C
Abstract In order to determine the concentration of volatile organic compounds (VOCs) in water and soil matrices the USEPA developed Method 8260C1 in conjunction with preparative Methods 50302 and 5035 3 . Water and soil sample analysis were analyzed in this study. A working linear calibration curve and Method Detection Limits (MDLs) will be demonstrated for various target compounds from the ...
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Quality Risk Management in Annex 1; 6.1
The use of Quality Risk Management (QRM) principles and risk-based approaches are prominent expectations throughout the Annex 1 draft. Risk-based approaches are mentioned 43 times in the draft reinforcing the importance of using Risk Based approaches in all aspects of sterile product manufacturing. In part 2 of our five part series, we highlight requirements related to Quality Risk Management ...
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Advanced Treatment of Produced Water for Crop Irrigation - Case Study
The Situation California is currently facing one of the most severe droughts in recorded history. In order to mitigate the drought conditions, various water conservation measures have already been implemented, and others are being considered. One method under consideration is using the advanced treatment of produced water to make it available for irrigation. A major challenge to the success of ...
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Ground Water Sampling for Metal Analyses
The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA’s Regional Superfund Offices, organized to exchange up-to-date information related to ground-water remediation at Superfund sites. Filtration of ground-water samples for metals analysis is an issue identified by the Forum as a concern of Superfund decisionmakers. Inconsistency in EPA Superfund ...
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Tracking biological pollution sources using PCR-DGGE technology at Ta-An Beach
The environmental authority of Taiwan has announced that ocean quality standard A, with E. coli less than 1,000 CFU/100 mL is safe for swimming. Ta-An Beach in central Taiwan was found to have exceeded 1,000 CFU/100 mL, which is 51% of the total monitoring records. Sewage, piggery and duck wastewater are discharged directly into this area. The traditional pollution source trace methods did not ...
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Pesticide transport with runoff from turf: observations compared with TurfPQ model simulations
Received for publication September 30, 2008. Pesticides applied to turf grass have been detected in surface waters raising concerns of their effect on water quality and interest in their source, hydrological transport and use of models to predict transport. TurfPQ, a pesticide runoff model for turf grass, predicts pesticide transport but has not been rigorously validated for larger storms. The ...
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Groundwater quality assessment of a freshwater wetland in the Selangor (Malaysia) using electrical resistivity and chemical analysis
Groundwater quality of the Paya Indah Wetland (PIW) was targeted for the present study using integrated two-dimensional electrical resistivity imaging (ERI) and hydrochemical surveys. Electrical resistivity and the influence of variations in the lake level were investigated using daily water balance measurements, water sampling and geochemical analysis, and well-logging. The geoelectrical ...
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Bacteriological assessment of aquifer storage and recovery (ASR) water in southwest coastal Bangladesh
Safe drinking water is scarce in southwest coastal Bangladesh. Harvested rainwater and rain-fed pond water are the main sources of drinking water for people living in this area. Both government and non-government organizations are promoting aquifer storage and recovery (ASR) schemes to provide safe drinking water for this population. This study assessed the bacteriological quality of both ...
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GPR survey to locate USTs and piping at a retail facility
PROJECT: GPR survey with confirmatory drilling + soil and water sampling / analysis LOCATION: Spokane, Washington PROJECT DESCRIPTION: Designed and performed a tight-line / saturation Ground Penetrating Radar (GPR) survey of an active retail property, to determine the presence, if any, of buried 1950s-vintage underground storage tanks (USTs). Performed onsite instrument "calibration" with known ...
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Analysis of Epichlorohydrin in Drinking Water Using the Lumin P & T Concentrator
Abstract Epichlorohydrin (ECH) is a versatile starting material in the production of drugs and polymers and is also used as an insect fumigant and solvent for organic synthesis reactions. ECH-based polymer pipes are widely employed in the production of drinking water. Due to its extreme reactivity and toxicity, many nations have begun imposing limits on the amount of ECH allowable in drinking ...
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Removal of ammonium ions by laboratory-synthesized zeolite linde type A adsorption from water samples affected by mining activities in Ghana
Ammonium ion adsorption by laboratory-synthesized zeolite (linde type A; LTA) was investigated in batch kinetics experiments. Synthesized zeolite LTA was characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy and particle size analysis. Water samples were taken from the Nyam and ...
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A novel approach for providing potable water in rural Sodwana Bay, northern Kwazulu-Natal, South Africa
Many people living in the Sodwana area of South Africa do not have access to potable water. Groundwater is the best source of fresh water for the rural community. Potable water in the Zululand coastal plain, Sodwana, South Africa can be enhanced by: (i) providing detailed information on the aquifer system using geophysics; (ii) providing information on groundwater quality and its efficient ...
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TIMS or MC-ICP-MS – which do i need?
So, you have a need for precise isotope ratio measurement of solids, most likely metals, but perhaps you’re early in your career and not yet an expert in the instrumental techniques. You’ve already found out that thermal ionization MS (TIMS) and multi-collector ICP-MS (MC-ICP-MS) are the likely techniques of choice, but which should you choose? I work for Isotopx, a company the ...
By Isotopx Ltd
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US EPA Method 524.2 with the Tekmar Lumin P&T Concentrator, AQUATek LVA and Agilent 7890B GC/5977A MS
Abstract US EPA Method 524.2 was used to determine the concentration of volatile organic compounds (VOCs) in drinking water. The Teledyne Tekmar Lumin purge and trap (P&T) concentrator, along with an AQUATek LVA (liquid vial autosampler) and Agilent 7890B GC/5977A MS was used to create a working linear calibration curve and method detection limits (MDLs) for target compounds. This study will ...
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