CHN analyzer

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A modern CHN Analyzer constructed in 2011.

A CHN Analyzer is a scientific instrument which can determine the elemental concentrations in a given sample. It is used to measure carbon, hydrogen and nitrogen. Sample sizes are most often just a few milligrams, but may differ depending on system. For some sample matrices larger mass is preferred due to sample heterogeneity.

This instrument uses combustion to oxidize the sample into simple compounds which are then detected with thermal conductivity detection or infrared spectroscopy. Separation of interference is done by chemical reagents.

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