environmental sample Articles

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Leader in sample preparation systems benefits from Axetris MFCs’ high dynamic range - Case Study

by Axetris Ag  (Jun. 27, 2016)

Split ratio flexibility of GC injector increased 30-fold A leading manufacturer of analytical sample preparation systems in gas chromatography (GC) switched to Axetris MFCs - and in doing so, simplified their product range, while offering their customers at least 30 times more flexibility in split ratio. The market-leading dynamic range of ...

How does living with aircraft noise affect wellbeing? A study of UK airports

by European Commission, Environment DG  (Jul. 8, 2016)

Airports are associated with air and noise pollution and may, therefore, reduce the quality of life of local people. This study assessed the link between aircraft noise and subjective wellbeing, using data from 17 English airports. The authors conclude that living under flight paths has a negative effect on people’s overall wellbeing, ...

Dispersed Phase Inertisation (DPI): A New Technology for the Treatment of Landfill Leachate and Complex Water

by Energy & Waste S.l  (Jun. 1, 2014)

Inertisation is thus far the only technology for the conversion of leachate and contaminated water into an inert product, thereby facilitating handling and disposal in MSW landfills. Introduction One of the most complex aspects of the global management of an MSW landfill or treatment plant is leachate. This liquid comes mainly from the ...

Sustainable sampling of native bromeliads for environmental monitoring

by Inderscience Publishers  (Jun. 30, 2010)

By analysing the leaves of bromeliads, the availability of chemical elements in the atmosphere can be assessed. However, sampling steps affect the reliability of using such plants for environmental quality studies. This paper describes a novel and sustainable sampling methodology for conservation units, in which small discs (6 mm diameter) of ...

Concentration and solvent recovery of environmental samples in dichloromethane

by BÜCHI Labortechnik AG  (Feb. 2, 2015)

Environmental samples are usually extracted with an organic solvent which is then concentrated prior to final analysis. In this short note, initial conditions and evaporation settings for the parallel concentration of samples dissolved in dichloromethane (DCM) having different starting volumes are presented. These settings have been optimized for ...

Ambient Air Sampling Methods

by Perfect Pollucon Services  (May 3, 2015)

Pollutants are nothing but any substance that may present in an atmosphere in such a concentration that it may harmful to surrounding, living organism or human being. Sampling and analysis of air pollutants is known as Air quality monitoring and it is major part of environmental monitoring. There are many advanced types of ambient air ...

Decontaminating Groundwater Sampling Devices

by QED Environmental Systems  (Jan. 1, 1997)

These studies are the second part of a two year project that examines decontaminating groundwater sampling devices. In the first year, the efficiency of various decontamination protocols was tested using small test pieces of materials that are commonly used in groundwater sampling devices. Those tests showed that a hot detergent wash and rinse ...

Biodegradation Tests for Wastewater Samples

by Challenge Technology  (Jan. 1, 2003)

Biodegradation Tests for Wastewater Samples Biodegradation tests usually involve comparison of the oxygen uptake of a test sample – or gas production for anoxic or anaerobic tests – to that for a readily biodegradable control substrate (usually acetic acid, ethanol, or aniline). While biodegradation characteristics can vary among chemical types ...

Theoretical Considerations on the use of solid-phase microextraction with complex environmental samples

by Southern California Coastal Water Research Project Authority (SCCWRP)  (Jan. 1, 2002)

Untitled Document The equations governing the use of equilibrium solidphase microextraction (SPME) for environmental samples with complex heterogeneous matrices were derived in terms ...

A simple, efficient method for the separation of humic substances and DNA from environmental samples

by American Society for Microbiology  (Dec. 1, 1997)

Three different gels (Sepharose 4B, Sephadex G-200, and Sephadex G-50) were evaluated as a means of removing humic contaminants from DNA extracts of environmental samples. Sepharose 4B gave superior separation of DNA from humics, and DNA purified in this way showed consistently greater amplification than DNA purified by the other ...

Book Review: Field Sampling: Principles and Practices in Environmental Analysis

by Inderscience Publishers  (Jul. 31, 2006)

Field Sampling: Principles and Practices in Environmental Analysis, by Alfred R. Conkling Jr. Marcel Dekker, 2004. 354pp. ISBN 0-8247-5471-9Keywords: book ...

An interlaboratory comparison study for the determination of dialkyl phthalate esters in environmental and biological samples

by John Wiley & Sons, Ltd.  (Jun. 15, 2012)

A series of interlaboratory comparison exercises were conducted to assess the accuracy of dialkyl phthalate ester (DPE) concentration measurements in environmental and biological samples. Five laboratories participated in analyses to determine DPE concentrations in standard test solutions; marine sediments; three certified reference materials ...

A new approach based on polynomial functions for measuring the acute toxicity of environmental samples

by Inderscience Publishers  (Jan. 30, 2007)

In this paper, a new mathematical approach for the estimation of acute toxicity in environmental samples is proposed. The concentration of pollutant or the amount of sample producing the inhibition of 50% of the living organisms used for the test (EC50) is determined by means of Polynomial Functions (PF) applied to the experimental x ...

Fast Analysis of Environmental Samples, Using Solid-Phase Microextraction (SPME)

by Sigma-Aldrich Co., LLC  (Dec. 31, 1998)

Solid Phase MicroExtraction (SPME) is an alternative to conventional sample extraction techniques. In SPME, analytes establish an equilibrium between the sample matrix and a stationary phase coated on a fused silica fiber (Figure A). The fiber is thermally desorbed in the injection port of the GC, which transfers the analytes into the capillary ...

Detection of Bacillus anthracis spores in postal and environmental samples in cases of suspected bioterrorism

by Inderscience Publishers  (Nov. 8, 2007)

From October 2001 to the end of 2004, a series of postal samples containing material suspected of containing Bacillus anthracis spores were examined. Environmental samples from dwelling places of some addressees and laboratory areas, including equipment, were also examined. Classical culture methods for isolation and identification were slightly ...

Book Review: Fundamentals of Environmental Sampling and Analysis by Chunlong Zhang

by Inderscience Publishers  (Nov. 21, 2008)

Fundamentals of Environmental Sampling and Analysis, by Chunlong Zhang. New York, John Wiley and Sons, 2007. 436pp. ISBN 978-0-471-71097-4Keywords: book ...

Determination of trace amounts of mercury (II) by catalytic kinetic method in environmental samples

by Inderscience Publishers  (Apr. 19, 2010)

A highly selective and sensitive, spectrophotometric method is developed for the determination of Mercury(II) in environmental waters samples, based on indicator reaction of potassium hexacyanoferrate(II) and 2-methylpyrazine (2-Mepz), catalysed by Hg(II). The reaction was monitored spectrophotometrically at pH = 3.50 ± 0.02 and 25.0 ± 0.1°C by ...

Simple and efficient ion imprinted polymer for recovery of uranium from environmental samples

by IWA Publishing  (Jan. 1, 2012)

Ion imprinted polymer material (IIP) was prepared by forming ternary complexes of uranyl imprint ion with 1-(prop-2-en-1-yl)-4-(pyridin-2-ylmethyl)piperazine and methacrylic acid followed by thermal copolymerization with ethylene glycol dimethacrylate as the cross-linking monomer in the presence of 1,1′-azobis(cyclohexanecarbonitrile) initiator ...

SupelMIP SPE for Sample Cleanup and Analysis of Food and Environmental Contaminants

by Sigma-Aldrich Co., LLC  (Sep. 5, 2013)

MIP SPE was successfully used for extraction of multiple classes of food and environmental contaminants from difficult matrices, such as egg, oil and flour. • Six nitroimidazoles were extracted from egg and milk with recoveries typically over 90%. • Among NSAIDs compounds, acidic compounds gave good recoveries between 100-115% while ...

Oxygen Uptake of Soil and Compost Samples

by Challenge Technology  (Jan. 1, 2003)

Oxygen Uptake of Soil and Compost Samples The Challenge AER-200 aerobic/anaerobic respirometer is ideally suited to determine in-situ rates of oxygen uptake in soil or compost samples – as may occur in the upper layers of soil under natural atmospheric conditions or in mixed compost reactors. This objective is accomplished by using a ...

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