Carbonyls in Carbon Monoxide and Syngas


Carbon monoxide (CO) is used in a number of industries and applications. However, carbon monoxide can form a metal carbonyl on contact with metals such as chromium, molybdenum, iron, nickel, and cobalt. Because of this characteristic, it is important that the concentration of metal carbonyls in carbon monoxide or gas mixtures containing carbon monoxide is known or controlled.

CONSCI harnesses the state-of-the-art technique of gas chromatography-inductively coupled plasma-mass spectrometry (GC-ICP-MS) to separate and quantitate ultra-trace levels of volatile metallic and organo-metallic compounds. GC-ICP-MS is particularly well suited to this application because of its sensitivity as well as its selectivity and tolerance of significant levels of other components in the sample matrix.

Earlier techniques are highly suspect. CONSCI has developed innovative sampling and analytical technology to address these shortcomings, and has established a novel calibration technique for analytes with no available gas phase standards. Thus allowing the precise measurement of metal carbonyls at the part-per-trillion levels.

The figure below illustrates part-per-billion analyses of nickel, iron, and chromium carbonyls.


Chromatogram of nickel, iron, and chromium carbonyls at ppb levels (bottom) and isotopic measurement/confirmation of chromium carbonyl.


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