水体中异味化合物定量测定的一种有效方法

An Effective Method for Determination of Off flavor Compounds in Waters

中文关键词:  开环捕捉分析(OLSA)  异味性化合物  气相色谱

英文关键词:open-loop stripping analysis(OLSA)  off-flavor compounds GC

中文摘要:

      研制了一种开环捕集装置(OLSA),以富集水中的异味化合物并用毛细管GC三内标法定量.该装置以纯化空气为吹脱气体,玻璃管道为加热气路.吸附小,背景低.并对活性碳富集小管、萃取技术以及水样中离子强度等作了深入的研究.结果表明:方法的检出限为1.5ng/L.样品添加回收率(n=11)为99.8%～115%,精密度为4.8%～11.6%(±S.D.%).

英文摘要:

      A home-made open-loop stripping analysis (OLSA) system was developed for determining five earthy-musty compounds in water by gas chromatography. The purified air was used as stripping gas, and the glass tube as heating line, which reduce greatly the background level and adsorption during the analysis. In addition, activated carbon filter, extraction mode and inorganic ionconc entration in water were compared and optimized. The results showed that the detection limits for these five odorants were low to 1.5ng/L, the mean recoveries and the precision ranged from 99.8%～115% and 4.8%～11.6% (±S.D.%) respectively.