The question of cost and environmental impact of methods are usually high up in the minds of most lab managers. Gerhardt have striven to make the Dumas method as environmentally friendly and cost effective as possible. Catalysts without Chrome and non-toxic absorbents for water and Carbon dioxide from the gas stream demonstrate this.
DUMATHERM® has the ability to use small sample weights and calculates exactly the amount of Oxygen required for combustion to minimize gas usage. The less Oxygen used the less Copper required to remove the Oxygen from the gas stream before passing the detector.
By using effective sample preparation equipment such as the FRITSCH Pulverisette 14 sample homogeneity was improved. Better sample homogeneity allowed smaller sample weights. Gerhardt have produced a document discussing this in more detail.