Deane M
Environmental Hazards Investigation Branch, California Department of Health Services, Emeryville 94608.
Public Health Rev. 1994;22(3-4):279-92.
The uptake of carbon monoxide in Los Angeles commuters was measured by determining carbon monoxide concentrations in expired air before and after commuting. Estimates of exposure were made by determining carbon monoxide concentration in air collected within each car during each trip. There was a definite increase in expired air carbon monoxide concentration during the morning commute trip, but not during the afternoon trip. No consistent differences by geographic area were noted. Multiple correlation analysis showed that the post-commuting values depended more upon precommuting expired air values than upon carbon monoxide measured within the car. Smokers showed consistently higher values of carbon monoxide than nonsmokers, and the effect of smoking was several times greater than that of exposure to carbon monoxide levels experienced during commuting.
通过测定通勤前后呼出气体中的一氧化碳浓度，来测量洛杉矶通勤者一氧化碳的摄入量。通过测定每次行程中每辆车内收集的空气中一氧化碳浓度，来估算暴露情况。早晨通勤行程中呼出气体一氧化碳浓度有明显升高，但下午行程中没有。未发现不同地理区域存在一致差异。多元相关分析表明，通勤后的值更多地取决于通勤前呼出气体的值，而不是车内测得的一氧化碳值。吸烟者呼出气体中一氧化碳值始终高于不吸烟者，吸烟的影响比通勤期间接触的一氧化碳水平的影响大几倍。
