Spectrophotometric Titration of Parts per Million of Carbon Dioxide in Gases

Abstract

air compressors, would deactivate the catalyst, some oil was introduced into the catalyst chamber. The expected formation of large concentrations of carbon dioxide occurred for a while, but there was no loss of catalytic activity.The entire system has been in continuous operation for over two years. Except for routine maintenance and periodic checks of calibration with known mixtures, no attention has been required and there has been no sign of catalyst deactivation. Figure 3 is a typical record of the hydrocarbon content of feed air in terms of parts per million of methane. The rapid response to changes in concentration is clearly evident.

Air Pollution

“…Holm-Jensen's technique for carbon dioxide has already been mentioned (158). A spectrophotometric titration technique for carbon dioxide was also described (216). Lysyk et al described a new technique of catalytic combustion of carbon monoxide to carbon dioxide, which was determined gravimetrically (217).…”

Monitoring Trace Hydrocarbons in Air by Catalytic Oxidation and Nondispersive Infrared Analysis

“…A gravimetric analysis using Ascarite absorption tubes was described by Kolthoff and Sandell (2). Others have used either the pH of a sodium bicarbonate absorber solution (1) or a continuous photometric method using phenol red as an indicator in aqueous bicarbonate (3). The latter method covered the range of 0.06 to 12% carbon dioxide.…”