Instrument grade is a purity description for a specialty gases product that is designed to be used on an analytical instrument, for example, “Instrument Grade Nitrogen 5.0“ indicates that the gas is nitrogen of purity is 99.999%, with total impurities below 10 ppm for the intended purpose of being used with analytical instrumentation. Typical applications might be as a purge gas for FTIR or GC-MS instrumentation, as a carrier gas for gas chromatography or a zero gas for CEM systems.
High quality instrument grade gases can provide many benefits to instrumentation applications. Using them will reduce background interference, minimise noise & baseline drifting, and therefore provide higher sensitivity & accuracy of the analysis results. The low impurities can also extend the instrument life.