固相萃取-气相色谱法分析水中三溴甲烷、二氯一溴甲烷和一氯二溴甲烷  

Solid phase extraction-gas chromatography for the analysis of tribromomethane,dichloromethyl bromide and monochlorodibromomethane in water

作　　者：赵雅芳 张峰 徐兰 王慧怡 Zhao Yafang;Zhang Feng;Xu Lan;Wang Huiyi(Jiangsu Kangda Testing Technology Co.,Ltd.,Suzhou 215002,China)

机构地区：[1]江苏康达检测技术股份有限公司

出　　处：《分析仪器》2019年第6期37-40,共4页Analytical Instrumentation

摘　　要：建立了固相萃取-气相色谱法分析水中三溴甲烷、二氯一溴甲烷、一氯二溴甲烷3种不同三卤甲烷含量的方法。考察了固相萃取柱类型、洗脱剂极性、氯化钠加入量对萃取过程的影响。结果显示:pH为5、氯化钠加入量为5%时,选择乙酸乙酯和二氯甲烷(1+1)作为混合溶剂洗脱,3种三卤甲烷分离度满足要求,浓度在0.00~50.0μg/L范围内线性相关系数大于0.999,三卤甲烷加标回收率为90.1%~96.4%,测定结果的相对标准偏差均小于2.0%(n=6)。该方法操作简便,准确度、精密度好,灵敏度高,检出限低,适用于水中三卤甲烷的测定。The effects of column type,eluent polarity,sodium chloride content on the extraction process were investigated.When pH was 5 and sodium chloride content was 5%,ethyl acetate and dichloromethane(1+1)were mixed as solvent for elution.The separation degree of these three trihalomethanes met the requirements.The linear correlation coefficient was greater than 0.999 when the concentration was in the range of 0.00-50.0 g/L.The recovery of trihalomethane was 90.1%-96.4%.The relative standard deviations of the results were less than 2.0%(n=6).The method is simple,accurate,precise,sensitive and of low detection limit.

关 键 词：固相萃取 气相色谱法 水 三卤甲烷 

分 类 号：O65[理学—分析化学]