Laboratory evaluation of the Ecolyzer carbon monoxide dosimeter.
Young RJ; Huebener DJ; McCarty GE; Loebach DV
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, 1980 Jun; :1-6
A direct reading of carbon-monoxide (630080) with an electrochemical sensor was evaluated. The operating principle of the Ecolyzer was based on the oxidation of carbon-monoxide to carbon-dioxide (124389) at a catalytically active electrode in an aqueous electrolyte. Test data included humidity and temperature studies to determine if the dosimeters would perform under adverse environmental conditions. Tests conducted at 75 degrees-F appeared to be quite accurate, but at 32 degrees the accuracy was not so good. Dosimeter linearity was good but there were errors at carbon-monoxide concentrations of 20 parts per million and below. Dosimeter accuracy when exposed to fluctuating carbon-monoxide concentrations was good. Tests at both high and low humidities appeared to be erratic. The shelf life was relatively short. After 12 weeks of storage, some of the units failed to zero or span correctly. The authors conclude that the Ecolyzer appears to be promising. The problems need to be worked out before it can be used reliably.
NIOSH-Author; Sampling-equipment; Fumes; Safety-research; Safety-equipment; Air-contamination; Air-quality-control; Analytical-methods
National Institute for Occupational Safety and Health