双衍生GC-MS法测定污水臭氧化过程的醛和羧酸  

Method of GC/MS with Double Derivation for Simultaneous Detection of Aldehydes and Carboxylic Acids during Ozonation of Wastewater

作　　者：戴艺[1,2] 古新[1] 曹楠[1] 张昱[1] 杨敏[1] 姚重华[2] 李魁晓[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]华东理工大学资源与环境工程学院,上海200237

出　　处：《中国给水排水》2008年第24期87-90,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07314-003);北京城市污水处理及再生水质提高关键技术研究及工程示范(D07050601500000);天津市科技创新专项资金(06FZZDSH00900)

摘　　要：以O-2,3,4,5,6-pentafluorobenzylhydroxylamine(PFBHA)和bis(trimethylsilyl)trif-luoroacetamide(BSTFA)为衍生化试剂,建立了同步分析城市污水厂二级出水臭氧深度处理出水中的醛(甲醛、乙醛、丙醛、乙二醛)和羧酸(丙酮酸)的双衍生气相色谱-质谱(GC-MS)方法。在电子轰击(EI)源下用选择离子模式进行分析,结果表明:甲醛、乙醛、丙醛在5μg/L～2mg/L,乙二醛和丙酮酸在5μg/L～1mg/L浓度范围内线性较好;各种物质的检测回收率均在74%以上,平均相对标准偏差<14%。对实际水样的测定表明,污水厂二级出水中含有少量的醛类和丙酮酸,臭氧处理会导致这些物质明显增加。A method of GC/MS with double derivation for simultaneous detection of aldehydes and earboxylic acids in the ozonated secondary effluent from a WWTP was established by using 0-2,3,4,5,6- pcntafluorobenzylhydroxylamine （PFBHA） and bis （trimethylsilyl） trifluoroaeetamide （BSTFA） as derivatives. An analysis was performed with electron bombardment source in selected ion monitoring mode. The results show that formaldehyde, acetaldehyde and propionaldehyde have a good linear relationship within the concentration range from 5 μg/L to 2 mg/L and glyoxal and pyruvic acid from 5 μg/L to 1 mg/L. The average recoveries of the 5 analytes are above 74% , and the relative standard deviations （RSD） are under 14%. It is found that ozonation of the secondary effluent could increase the levels of the above chemicals markedly while a small amount of them already exist before ozonation.

关 键 词：醛 羧酸 气相色谱-质谱 双衍生 臭氧氧化 

分 类 号：X703.1[环境科学与工程—环境工程]