CAJ | 학술논문

［目的］研究炭管采集空气中丁醚的气相色谱分析方法。［方法］活性炭吸附空气中丁醚，样品经加热解吸，色谱检测。［结果］当空气中丁醚浓度范围在269～1 077 mg/m3(参照美国标准100 ppm，相当于533 mg/m3)时，其方法的变异系数为1.1 %，回归方程式y=96.1+17.79x,r=0.999 8，最低检测限4.4×10-3μg(进样2 ml)。平均解吸效率为97.3 %；穿透容量(BTV)14.1 mg。活性炭吸附1 077 μg丁醚后，样品放置一周，回收率仍可达93.7 %。本法的测定范围上限取决于炭管的吸附量，而该吸附量可随空气中丁醚的浓度及其它物质(醚类)而变化。［结论］本方法可应用于车间环境中丁醚浓度的测定。
［목적］ 연구탄관채집공기중정미적기상색보분석방법。［방법］ 활성탄흡부공기중정미，양품경가열해흡，색보검측。［결과］ 당공기중정미농도범위재269～1 077 mg/m3(삼조미국표준100 ppm，상당우533 mg/m3)시，기방법적변이계수위1.1 %，회귀방정식y=96.1+17.79x,r=0.999 8，최저검측한4.4×10-3μg(진양2 ml)。평균해흡효솔위97.3 %；천투용량(BTV)14.1 mg。활성탄흡부1 077 μg정미후，양품방치일주，회수솔잉가체93.7 %。본법적측정범위상한취결우탄관적흡부량，이해흡부량가수공기중정미적농도급기타물질(미류)이변화。［결론］ 본방법가응용우차간배경중정미농도적측정。
［Objective］ GC analytical method for butyl ether in the workplace air using sampling by charcoal tube was studied. ［Method］ Adsorption on charcoal,thermal desorption and analysis by GC(FID) were performed. ［Results］ The coefficient of variation for the whole analytical method in the range of 269～1077mg/m3 was 1.1%.Regression formula was y=96.1+17.79x,r=0.9998.Detection limit was 4.4×10-3μg(injection for 2ml).Desorption efficiency was 97.3%,breakthrough volume was 14.1mg.After taking 1077μg of butyl ether with the charcoal tube,it could be stabilized in seven days,its recovery efficiency was 93.7%.The upper detection limit of the method is dependent on the adsorptive capacity of the charcoal tube.This capacity varies with the concentration of butyl ether and other substances as ethers in the air. ［Conclusion］ The method can also be used to determine butyl ether and the simultaneouly presented ethers of two or more substances in the workplace air by simply changing gas chromatographic conditions from isothermal to a temperature programmed mode of operation.