摘要
建立了冷冻干燥，超声波提取，弗罗里硅土固相萃取净化（Florisil SPE cleanup），气相色谱一质谱（GC／MS）检测河流底泥沉积物中五氯酚（PCP）和六氯苯（HCB）残留的方法。方法加标回收率在9l％～99％之间，相对标准偏差小于10％。检测五氯酚和六氯苯的方法检出限（干重）分别为0．0383μg／g、0．0532μg／g。应用该方法进一步研究了取样点底泥沉积物剖面PCP、HCB含量与总有机碳（TOC）的分布特征。由此推测TOC可能是PCP和HCB在底泥沉积物剖面中沿纵深向下层迁移的一个重要载体。
A method for the determination of pentachlorophenol （PCP） and hexachlorobenzene （HCB） in river sediments was established. Frozen-dried sediments analytes were pre-treated by ultrasonic wave extraction and acetyl derivation, followed by Florisil solidphase-extraction cleanup （Florisil SPE cleanup）,and then detected by gas chromatographymass spectrometry （GC/MS） finally. The results presented a high accuracy and precision with the mean recoveries fell in 91%-99%, relative standard deviation lower than 10%. Method detection limits （dry weight） were 0. 038 3μg/g, 0.053 2μg/g for PCP and HCB, respectively. Further more, a research was processed on the vertical distribution of PCP, HCB and total organic carbon （TOC） for the sampling sites. Accordingly, it is deduced that TOC is a possible important carrier of PCP and HCB vertical distribution in river＇sedi ments.
出处
《质谱学报》
EI
CAS
CSCD
2006年第2期79-83,89,共6页
Journal of Chinese Mass Spectrometry Society
关键词
固相萃取
弗罗里硅土
气相色谱-质谱法
沉积物
五氯酚
六氯苯
solid phase extraction （SPE）
Florisil PR
gas chromatography-mass spectrometry （GC/MS）
sediments
pentachlorophenol
hexachlorobenzene
