【摘要】 该研究在优化分析条件的基础上,采用顶空固相微萃取(HS-SPME)和气相色谱/质谱(GC-MS)联用方法测定了黑臭河流水体中二甲基三硫醚的含量。通过研究萃取头涂层、萃取温度、萃取时间、水样体积和气相色谱进样口温度对二甲基三硫醚萃取效率的影响,得到了二甲基三硫醚最佳预处理和检测条件为:采用CAR-PDMS(75μm)萃取头,取20 mL待测水样在45℃恒温搅拌下顶空萃取30 min,进样口温度为250℃。采用优化后的方法对实际城市黑臭河流水样进行了检测,测得的二甲基三硫醚的浓度范围为5 853～8 939 ng/L。更多还原

【Abstract】 Based on the optimization of analytical conditions,a headspace solid-phase micro-extraction coupled with gas chromatography/mass spectrometry had been developed for the determination of dimethyl trisulfide in heavily polluted surface water.SPME parameters such as fibers,extraction temperature,extraction time,sample value and GC injection temperature were evaluated for the efficiency of DMTS.The optimal condition was CAR-PDMS(75 μm) fiber,20 mL sample and extracting at 45 ℃ for 30 min,the GC injection temperature was 250 ℃.The dimethyl trisulfide concentration detected in heavily polluted surface water ranged from 5853 to 8939 ng/L.更多还原