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HPLC 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...

    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...

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

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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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    Analytical and measuring instruments of shimadzu cannabis testing solutions

    Shimadzu`s Cannabis Testing Solutions cover a broad range of applications, from potency testing to pesticide screening. We supply the instruments, methods and experience necessary to get you up and running quickly. Shimadzu scientific instruments have been applied to natural products, food sciences, pharmaceuticals and environmental testing for decades. Whether you are a chromatography expert or a novice, our platforms and training ensure that your laboratory will generate quality results from a wide variety of...

    By Shimadzu Scientific Instruments Inc based in Columbia, MARYLAND (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...

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

  • Chemical analysis and measurement solution for bio processing sector

    Raman in a Biological Matrix with the ability to distinctly identify molecular composition.

    By Tornado Spectral Systems based in Toronto, ONTARIO (CANADA).

  • Increased Pigment Removal with Analysis of Pesticides in Oranges

    An application was developed to demonstrate increased pigment removal for the analysis of pesticides, using Supel™ QuE Z-Sep/C18 QuEChERS and an Ascentis® Express C18 HPLC Column. The improved cleanup can decrease column and instrument fouling, leading to extended LC column lifetime and reduced instrument downtime.

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • 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...

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • Leak Detection

    Rapid, targeted and comprehensive volatile compound analysis with SIFT-MS facilitates fast identification of leaks and component defects

    By Syft Technologies Ltd based in Christchurch, NEW ZEALAND.

  • VROC initium for Automated Temperature Sweeps

    Powered by VROC technology, VROC initium includes a number of advanced features that will make your sample testing much faster and easier. Using automatic mode measurement, the instrument will use data collected during priming to establish the right shear rate to test samples of unknown viscosity.

    By RheoSense Inc based in San Ramo, CALIFORNIA (USA).

  • Membranes Technology for Lab Filtration

    Metalmembranes offers a unique laboratory filtration solution for a variety of filtration applications for instance bacterial concentration before analysis, sample preparation before (HPLC) analysis etc. The membranes have a pore sizes of 150 nm (Aluminum) and 15 nm (Titanium).

    By Metal Membranes based in Leeuwarden, NETHERLANDS.

  • Determination of Additives in Beverages using Ascentis Express Columns

    Beverages, such as sodas and energy drinks, can include a number of polar ingredients, which are easily soluble in the water matrix of the drinks. These ingredients include sweeteners (sugars and sugar substitutes), caffeine, vitamin supplements, amino acids, organic acids, and plant extracts. Because the analytes are already in solution, there is no need for extensive sample preparation. Dilution followed by direct injection into an HPLC is typically suitable. In this article we present two beverage applications...

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • 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...

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • 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...

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

  • Improved Reproducibility and Reduced Sample Preparation Time for the HPLC Analysis of Aflatoxins in Raw Peanut Paste

    The US FDA and international regulatory agencies have set contamination levels for aflatoxins in animal feedstuffs. Since Aspergillus may infect commodities pre-harvest, during storage or during processing, monitoring for aflatoxins in associated agricultural commodities at all stages of production is requisite. Field screening methods exist that are adequate to estimate contamination levels for aflatoxins. When additional confirmation or quantification is desired, chromatographic laboratory analysis is often...

    By MilliporeSigma based in Bellefonte, PENNSYLVANIA (USA).

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