顶空固相微萃取-气质联用法测定水中7种致嗅物质

发布时间：2018-04-10 14:22

  本文选题：腥味物质 + 醛　； 参考：《中国给水排水》2014年18期

【摘要】：采用自动顶空固相微萃取-气相色谱/质谱联用技术,建立了一种快速测定水中7种腥味醛类物质的方法,重点针对纤维萃取头类型、萃取方式、萃取温度、萃取时间以及离子强度等影响因素进行了优化。自动固相微萃取优化后条件为:CAR/PDMS(85μm)纤维头,Na Cl含量25%(W/V),65℃恒温振荡10 min,顶空萃取20 min,250℃下解吸3 min进入气相色谱/质谱进行分析。在优化的前处理和分析条件下,7种物质的回收率为86.30%~113.61%,方法检出限为1.61~17.53 ng/L,远低于各种物质的嗅阈值。
[Abstract]:An automatic headspace solid-phase microextraction (SPME)-gas chromatography / mass spectrometry (GC / MS) method was developed for the rapid determination of seven kinds of aromatic aldehydes in water, focusing on the type of fiber extraction head, the extraction method and the extraction temperature.The extraction time and ionic strength were optimized.The optimized conditions of automatic solid phase microextraction (SPME) were as follows:% CAR / PDMS 85 渭 m) the content of NaCl in the head of the fiber was 25 W / V ~ (-1) and oscillated at 65 鈩，

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