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Environmental Analysis Applications

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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 Merck KGaA, Darmstadt, Germany based in Darmstadt, GERMANY.

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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 KGaA, Darmstadt, Germany 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 Merck KGaA, Darmstadt, Germany based in Darmstadt, GERMANY.

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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 Merck KGaA, Darmstadt, Germany based in Darmstadt, GERMANY.

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    Baseline® 9100 Residual Solvent Analysis — Ethanol, Isopropanol, and Acetone

    MOCON’s Baseline® Series 9100 Gas Chromatograph equipped with a photoionization detector (PID) provides a quick, cost effective quantitative analysis of IPA and acetone in air at levels in the ppb and sub-ppb range with no preconcentration necessary. Isopropanol and acetone are detected and accurately quantified to sub-ppb levels in under 3 minutes with ethanol producing no interference. The instrument is sensitive to below 5 ppb for both IPA and acetone employing the MOCON Baseline® standard PID or 0.1 ppb using the MOCON Baseline® high sensitivity PID.

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

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    Determination of protein purity and heterogeneity with capillary gel electrophoresis and capillary isoelectric focusing

    INTRODUCTION

    Antibodies, protein-based therapeutics, and other recombinant proteins are final products in biotechnological and pharmaceutical industry. Determination of their purity, stability, and hetero geneity is of utmost importance since post-translational modifications as well as degradation processes can change drastically the biological activity of these proteins.

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

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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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    Investigate

    Pro-active management of incidents and complaints for efficient investigation workflow. Envirosuite’s incident intelligence platform is the link between your operation and the community. Simple and effective communication workflows allow for transparency and trust to enhance relationships and brand reputation. With all your intelligence in one place, the progress of an incident or complaint can be easily tracked, assigned and referenced at any time.

    By Envirosuite Limited based in Brisbane, AUSTRALIA.

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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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    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 based in Hollywood, 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 AMETEK MOCON - Baseline based in Lyons, COLORADO (USA).

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    Gas analysis for the indoor air industry

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

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    Microbiological solutions for the food safety & nutrition industry

    Our labs are USDA recognized and are under government grants to conduct food microbiological research. Approved test methodologies include carefully selected FDA, USDA, BAM, USP and AOAC official methods. For more information about food safety methods, check out these Food Safety Guides. The MiL routinely performs rapid microbial identifications, confirmations, and tracks contaminant sources of all pathogenic, indicator and spoilage organisms using the latest technologies such as GC FAME, Biolog®, Ribotyping, and 16S rRNA base pair sequencing. Our computerized identification databases have over 3,500 microorganisms profiled and include all pathogenic bacterial strain subspecies, yeast and molds, and actinomycetes.

    By Microbe Inotech Laboratories, Inc based in St. Louis, MISSOURI (USA).

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    Detergent compliance solution for detergents industry

    Detergent Compliance Solution; Lisam’s solution automates production of your ingredient labels (IL)and data sheets (IDS) Global compliance for detergents is easier than ever before. European legislation on detergents has been in place since 2005 and covers the manufacturing, sale and use of detergents throughout the EU. All those responsible for placing a detergent or a surfactant for a detergent on the market or exporting from North America must comply with this regulation, which is routinely updated.

    By Lisam Systems based in Ecaussinnes, BELGIUM.

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    Fragrance compliance solution for fragrances industry

    Lisam Systems offers an unparalleled compliance solution for the fragrance industry to generate reports, labels and IFRA certificates. Fragrances are subject to an international legislative and regulatory environment that affects every part of manufacturing and the supply chain. The IFRA is a global association that represents world-leading fragrance makers. It sets standards for safe use and manufacture of fragrance materials, and directs a code of practice to further consumer safety and environmental protection.

    By Lisam Systems based in Ecaussinnes, BELGIUM.

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    Instruments and analyzers for outdoor material testing

    Weathering of materials is most often an irreversible process affecting the cosmetic properties or strength of materials. This aging process is mainly driven by UV radiation, Heat and reactive elements in the atmosphere, for example chemical contamination. The plastic fabric of the product can dry and therefore weakened. The solar load can overheat the products and change material properties irreversibly. A common method to test the deterioration of materials is to expose materials to sun light and environment. To be able to quantify the aging process, the parameters that affect the aging process must be measured.

    By EKO Instruments based in San Jose, CALIFORNIA (USA).

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