碱化衍生-顶空气相色谱法测定固体废物中的三氯乙醛  

Alkalization Derivatization-Determination of Trichloroacetaldehyde in Solid Wastes by Headspace GC

作　　者：谢诚 马超云 陈慧 谢焱鑫 王钊 王露丹 李立中 黄警萱 Xie Cheng;Ma Chaoyun;Chen Hui;Xie Yanxin;Wang Zhao;Wang Ludan;Li Lizhong;Huang Jingxuan(Xiangtan Ecological Environment Monitoring Center of Hunan Province,Xiangtan 411104,Hunan,China)

机构地区：[1]湖南省湘潭生态环境监测中心,湖南湘潭411104

出　　处：《绿色科技》2024年第8期210-213,218,共5页Journal of Green Science and Technology

摘　　要：基于三氯乙醛碱化生成三氯甲烷,提出了顶空气相色谱法测定固体废物中三氯乙醛的含量。优化了氢氧化钠浓度、试验温度和时间等试验条件。称取2.00 g样品置于顶空瓶中,依次加入10 mL纯水和100g/L氢氧化钠0.1 mL,于60℃恒温振荡30 min,经顶空气相色谱法测定碱解前后三氯甲烷的差值,计算三氯乙醛的含量。三氯乙醛的质量浓度在20~800μg/kg与其对应的峰面积呈线性关系,方法检出限(3.14 s)为5μg/kg。按标准加入法对空白样品进行回收试验,回收率在85.3%~116%,测定值的相对标准偏差(n=6)小于15%;方法用于固废样品分析,测得回收率在79.5%~112%。Alkalizing Trichloroacetaldehyde to Chloroform,Headspace(HS)GC was applied to the determination of Trichloroacetaldehyde in solid wastes.The test conditions of sodium hydroxide concentration,test temperature and time were optimized.The 2.00g sample was weighed and placed in the HS-flask,followed by 10ml pure water and 0.1ml 100 g/L sodium hydroxide.The mixture was shaken for 30min at constant temperature of 60℃.The content of trichloroacetaldehyde was calculated by subtracting the value of Chloroform before and after Alkaline hydrolysis of sample determined by HS-GC.Linear relationship between values of peak area and mass concentration Trichloroacetaldehyde was found in the range of 20.0~800μg/kg,with detection limit(3.14s)of 5μg/kg.Recovery was tested on the bank sample by standard addition method,giving results in range of 85.3%~116%,with RSDs(n=6)of determined values less than 15%.The proposed method has been applied to the analysis of solid wastes and values of recovery ranged from 79.5%to 112%.

关 键 词：碱化衍生 三氯乙醛 固体废物 顶空气相色谱法 

分 类 号：X830.3[环境科学与工程—环境工程]