摘要
建立并比较研究了优化的吹扫捕集气相色谱质谱法(P&T/GC-MS)与优化的顶空气相色谱质谱法(HS/GC-MS)测定废水中8种松节油类化合物的方法.结果表明,P&T/GC-MS与HS/GC-MS法的测定检出限分别为1.1～7.2和6.9～22.2μg/L.在三个不同加标水平下,P&T/GC-MS与HS/GC-MS法测定实际废水样品中8种化合物的相对标准偏差分别为4.5%～15.6%和2.8%～10.6%(n=6),加标平均回收率分别为80.5%～122%和82.8%～125%.P&T/GC-MS法更灵敏,而HS/GC-MS法重现性更好.当分析大量复杂的实际废水样品时,P&T/GC-MS法易造成样品之间的交叉污染,并使吹扫管出现局部的腐蚀和沾污.因此,在满足灵敏度要求的前提下,HS/GC-MS法更适宜于分析废水中的松节油.
The optimized purge and trap-gas chromatography-mass spectrometry （P＆T/GC-MS） and optimized headspace-gas chromatography-mass spectrometry （HS/GC-MS） to determine eight kinds of turpentines in spiked and natural wastewater samples were established and compared. The results indi-cated that the detection limits of P＆T/GC-MS and HS/GC-MS were in the range of 1.1 to 7.2 μg/L and 6.9 to 22.2 μg/L, respectively. At three different concentration levels, the average recoveries of eight kinds of compounds in natural wastewater samples by P＆T/GC-MS and HS/GC-MS were in the range of 80.5% to 122% and 82.8% to 125%, respectively, with relative standard deviations of 4.5% to 15.6% and 2.8% to 10.6% （n =6）. P＆T/GC-MS was more sensitive, but reproducibility of HS/GC-MS was better. When a large number of natural complicated wastewater samples were determined, P＆T/ GC-MS was likely to cause the mutual contamination between samples and localized corrosion and contam-ination of purge and trap tube. Therefore, HS/GC-MS was more suitable for determination of turpentine in wastewater when the sensitivity requirement was met.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第10期86-90,共5页
China Water & Wastewater
基金
杭州市环境保护科研课题(2010013
2011003)
杭州市社会发展科研攻关项目(20120433B05)
