| 摘要 |
<p>An improvement in the elemental analysis of sulfur-containing materials to provide quantative determination of the sulfur content. In a preferred embodiment the elemental analysis of a material to determine its carbon, hydrogen, nitrogen and sulfur content by oxidizing, at elevated temperatures, a sample of the material to convert the carbon, hydrogen, nitrogen and sulfur present in this material to carbon dioxide, water, oxides of nitrogen and oxides of sulfur respectively; passing the resulting mixture of gaseous oxidation products and unreacted oxygen through a reduction zone containing copper at elevated temperatures to reduce the oxides of nitrogen to nitrogen, to convert any sulfur trioxide present to sulfur dioxide, and to remove the unreacted oxygen; passing the resulting mixture of carbon dioxde, water, nitrogen and sulfur dioxide through a separating column and into a detector to quantitatively measure each of the carbon dioxide, water, nitrogen and sulfur dioxide present in the gaseous oxidation product mixture; and calculating the quantity of each of carbon, hydrogen, nitrogen and sulfur present in the original material; is improved by maintaining the reduction zone at temperatures above about 800 DEG C.</p> |
