App Notes

The health benefits of avocado are associated with its high content of healthy fat, fiber, vitamins and minerals.

A fast method for the separation and determination of eight commonly used phthalates applying the KNAUER PLATINblue UHPLC System is presented in this application note.

Many laboratories are now prohibited from placing Hydrogen cylinders on their premises owing to health and safety restrictions. A Peak Scientific Precision Hydrogen Trace generator is a safe alternative to gas cylinders whilst providing pure carrier gas (99.9999% purity, moisture free), in quantities great enough to supply a number of GCs simultaneously.

Metabolomics and its toolset provide a foundation for quantitative biology and are indispensible for the detection of small molecules produced and/or transformed in the cells of living organisms.

It is now well-known that mobile phase components (i.e. additives and solvents) play a major role in ionization efficiency. Laboratory facing challenges in fast method development and high sensitivity are often condemned to use generic mobile phases and to invest in expensive high-end mass spectrometers.

This application note describes the extraction of the acidic catecholamine metabolites VMA, 5-HIAA, and HVA from synthetic urine using EVOLUTE® EXPRESS AX 96-well SPE plates.

The aim within the laboratory should be to achieve the best separation in the shortest time period. The most commonly used gases as carrier gas for GC are nitrogen, hydrogen and helium. The differences between the gases are evident when comparing their van Deemter curves. This is illustrated in the Van Deemter Equation

Detailed hydrocarbon analysis (DHA) is a separation technique used by a variety of laboratories involved in the petrochemical industry for analysis and identification of individual components as well as for bulk hydrocarbon characterisation of a particular sample. Bulk analysis looks at gasoline composition in terms of PONA components (Paraffins, Olefins, Naphthalenes and Aromatics) and other fuels in the C1-C13 range since this gives an indication of overall quality of the sample.

In this Application Note we describe the use of a continuously-sampling thermal desorber in conjunction with GC/TOF MS to monitor the build-up and decay of fragrances and potential allergens released into indoor air from a plug-in air freshener.

Carbonyl compounds are often found in urban atmospheres and can give rise to photo-chemical smog and reactions leading to ozone formation. The main source of these compounds includes products of incomplete hydrocarbon combustion produced by internal combustion engines. Insulating materials used in buildings and furniture can also be a source of such compounds in the atmosphere.