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Environmental Analysis Applications

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    Laboratory Weighing - Differential Weighing

    Perfecting a classical method. Determining the difference between the initial and residual weights of samples in percent and grams is one of the most frequent routine applications in a laboratory. METTLER TOLEDO offers a complete solution in this area. It consists of a balance, a printer, and application software for the specific balance being used. There is a choice between an integrated balance application, or an optional software cassette which simply plugs into the balance.

    By Mettler - Toledo Int. Inc based in Greifensee, SWITZERLAND.

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    Laboratory Weighing - Stent Weighing

    Weighing delicate tubular samples such as sticks, springs, tungsten wires or stents require highest weighing precision but unfortunately are difficult to handle. Our Automatic-S Microbalances are the best solution for weighing such delicate samples.

    By Mettler - Toledo Int. Inc based in Greifensee, SWITZERLAND.

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    Test Kits and Photometric Methods for agriculture, in food or water analysis

    When analyzing water and food, trust plays a very important role. Only careful analysis using tests that are performed correctly and are delivering sound results will help to maintain and improve our quality of life. With ready-to-use tests and test systems from Merck Millipore, you can trust your results. Our broad product range covers everything from water analysis to the control of production process up to the measurement of special food parameters.

    By Merck based in Darmstadt, GERMANY.

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    Analysis of Methylimidazoles in Caramel Colored Carbonated Beverages

    Caramel colorings are used as additives in a broad range of food and beverage products to impart a desired color, but have no nutritional or preservative function. Recently, the potential hazard to humans of ammonia- and ammonia-sulfite-process caramel colorings was raised, because they contain the by-product 4-methylimidazole, which is a potential carcinogen.1 The methylimidazole compounds are difficult to analyze due to their polar nature and low molecular weight. Traditional reversed phase techniques are unsuccessful in retaining these small polar compounds. Therefore, most HPLC methods utilize ion-exchange resins for analysis. Another common method involves GC analysis after the analytes first undergo a derivatization step. The purpose of the work shown in this article was to develop a simple and fast analytical method to determine the levels of 2-methylimidazole and 4-methylimidazole in caramel colored carbonated beverages.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

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    Bromate analysis for the drinking water industry

    Bromate forms during the ozonization of drinking water. Several international standards stipulate detection limits and test methods. Conductivity detection with chemical suppression allows the determination of bromate in the lower μg/L range. In the ng/L range, bromate can be detected by IC/MS coupling or post-column derivatization with potassium iodide and subsequent UV detection.

    By Metrohm AG based in Herisau, SWITZERLAND.

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    Ambient air monitoring by FID detection – airmoVOC BTEX

    Urban pollution is a problem that concerns more and more people in charge of public health. In large cities, car emissions are an important source of atmospheric pollution. This problem is growing as the traffic keeps on increasing. BTEX compounds are present in car emissions. It is therefore important to be able to analyze them with short analysis cycle duration and on a continuous and automatic way.

    By Chromatotec Group based in Val de Virvée, FRANCE.

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    Gas analysis for the indoor air industry

    By Teledyne API based in San Diego, CALIFORNIA (USA).

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    Formaldehyde and Acetaldehyde Determination in Air Using Fully Automated On-Line Desorption and Analysis of DNPH Cartridges

    Airborne aldehydes and ketones are collected by passing air through a cartridge containing 2,4-dinitrophenylhydrazine (DNPH). Carbonyl compounds react with the DNPH to form hydrazones, which are immobilized on the cartridge. These compounds can be easily eluted from the cartridge with acetonitrile and analyzed by HPLC with UV detection. Traditionally, this analysis including the workup contains a series of manual steps, which can become time-consuming and could incur experimental error. Automating the extraction of LpDNPH S10 cartridges and putting it in-line with the HPLC analysis will significantly reduce manual labor using this technique and this will improve reproducibility of the method by reducing potential experimental errors by the operator. The automation and unattended operation of the method leads to high throughput for determining airborne formaldehyde and acetaldehyde.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

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    Analysis of Isocyanates Using the ASSET™ EZ4-NCO Dry Sampler

    Isocyanates are used as a raw material to produce a number of products . Personal exposure can occur while the products made with isocyanates are being applied, or when the materials are removed by grinding or thermal degradation. Workers who are exposed to these compounds are at risk for respiratory disorders and asthma. The highly reactive nature of the isocyanate compounds and the low occupational exposure limits put high demands on both sampling and analytical techniques for monitoring of isocyanates in air. We investigated the performance of the LC-MS and LC-MS-MS methods in the analysis of isocyanates using the new ASSET™ EZ4-NCO Dry Sampler. We found that the analytical method can successfully reach the quantitation limit for most isocyanates of 5 ng/mL in the final sample when LC-MS-MS analysis was used and the quantitation limit of 10 ng/mL when LC-MS analysis was used. All 11 compounds were well-resolved chromatographically using a 15 cm Ascentis Express C18 column.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

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    Advanced water treatment equipments for ion exchange

    Ion exchange is an exchange of ions between two electrolytes or between an electrolyte solution and a complex. In most cases the term is used to denote the processes of purification, separation, and decontamination of aqueous and other ion-containing solutions with solid polymeric or mineralic `ion exchangers`.

    By Advanced Equipment and Services, Inc. (AESINC) based in Coconut Creek, FLORIDA (USA).

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    Measurement of diacetyl in ambient air to monitor workplace exposure limits.

    The Series 8900 Diacetyl Analyzer provides direct measurement of Diacetyl in ambient air. This instrument is utilized for environmental monitoring and to monitor workplace exposure limits. The Series 8900 Analyzer for Diacetyl employs a photoionization detector (PID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Diacetyl and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. The Diacetyl is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

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    Measurement of formaldehyde in ambient air for monitoring workplace exposure limits

    The Series 8900 Formaldehyde Analyzer provides direct measurement of Formaldehyde in ambient air. This instrument is utilized in industrial plants to monitor workplace exposure limits. The Series 8900 Formaldehyde Analyzer employs a flame ionization detector (FID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Formaldehyde and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Formaldehyde is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

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    Measurement of acrylonitrile in ambient air for monitoring workplace exposure limits

    The Series 8900 Acrylonitrile Analyzer provides direct measurement of Acrylonitrile in ambient air. This instrument is utilized in industrial plants to monitor workplace exposure limits. The Series 8900 Acrylonitrile Analyzer employs a flame ionization detector (FID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Acrylonitrile and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Acrylonitrile is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

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    Measurement of C1-C5 hydrocarbons for oil & gas exploration.

    The PetroAlert Model 8900 combines the selectivity of gas chromatography with the sensitivity, broad dynamic range, and hydrocarbon selectivity of a flame ionization detector (FID) providing fast analysis of C1-C5 hydrocarbons required in Mud Logging for Oil & Gas exploration. The PetroAlert Model 8900 uses a dual column configuration with timed backflush to vent which is used to strip off moisture and C6+ hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed sample volume is carried to the pre-cut column. Backflush of the pre-cut column is timed from sample injection so that only C1-C5 hydrocarbons are eluted from the pre-cut column to the analytical column. C6+ hydrocarbons on the pre-cut column are then vented. C1-C5 hydrocarbons are separated on the analytical column and elute to the flame ionization detector (FID) for analysis.

    By MOCON, Inc. - Baseline based in Lyons, COLORADO (USA).

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    Gas analysis & monitoring system for food traceability

    Recognition of raw materials: The analysis of stable isotopes is very important especially in studies of authenticity of the food. It, on the basis of different isotopic ratio, allows to recognize molecules, present in foods, having the same chemical structure but coming from different raw materials or processed by different processes, for example for biological synthesis or industrial.

    By ETG Risorse e Tecnologia S.r.l. based in Montiglio, ITALY.

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    Positive material identification for the metal alloy industry

    Positive Material Identification is a well accepted analytical materials testing and materials identification technique used within the metal alloy industry. It guarantees the materials chemical composition as required for quality control.

    By Oxford Instruments plc based in Abingdon, UNITED KINGDOM.

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    Air filtration and gas purification solutions for commercial industries

    Environments with an excess of suspended particles and/or contaminating gasses in the air may be unhealthy and might even cause harmful effects, increasing the risk of developing illnesses. To address these risks, vast numbers of public installations and buildings must provide air filtration solutions to ensure a high quality of air inside the building to safeguard the health and comfort of the occupants.

    By Bioconservacion SA based in Barcelona, SPAIN.

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    Analytical instruments for elemental analysis

    Elemental analysis is a generic term for a group of applications which deal with the analysis of a variety of materials (chemicals, liquids, polymers, waste material, etc.) for their elemental or isotopic properties. Typical examples of elemental analysis techniques where mass flow control plays a key role are Total Organic Carbon (TOC) or Total Organic Halides (TOX).

    By Axetris Ag based in Kaegiswil, SWITZERLAND.

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    Determination of D- and L-isomers of tartaric and malic acids in wines, wine materials, and food additive

    Naturally occurred is predominantly L-form of tartaric acid whereas its D-form and the relevant racemic mixture can be artificially synthesized. Generally, artificial acidification of wine with tartaric acid is allowed by OIV, but only pure L-form must be used for this purpose. Thus the analysis of tartaric acid isomers either in food additives or directly in wine can be an important parameter in clarifying any deviations in wine production. Analysis of isomers of malic acid is also within the necessary oenological procedures stated in OIV recommendations. LUMEX INSTRUMENTS offers the present method which allows determination of L- and D-forms of tartaric and malic acids in wine, wine materials, and special food additives by capillary electrophoresis method. 

    By Lumex Instruments Group based in Mission, BRITISH COLUMBIA (CANADA).

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    VOC / HAPs reporting

    The Wercs has developed an online reporting module which enables manufacturers to completely eliminate the manual system that is in place for VOC/HAPs reporting. This new module automatically gathers VOC/HAPs data from SDSs and cross-references it with the order history. Your customers can now go to a secured website, enter the name of the product and get a complete VOC/HAPs emission analysis for annual reporting requirements.

    By UL The WERCS based in Latham, NEW YORK (USA).

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