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题名: Optimized cleanup method for the determination of short chain polychlorinated n-alkanes in sediments by high resolution gas chromatography/electron capture negative ion-low resolution mass spectrometry
作者: Gao, Yuan1;  Zhang, Haijun1;  Chen, Jiping1;  Zhang, Qing1;  Tian, Yuzeng1;  Qi, Peipei1;  Yu, Zhengkun1
关键词: Short chain polychlorinated n-alkanes ;  Silica gel ;  Alumina ;  Column chromatography ;  Cleanup
刊名: ANALYTICA CHIMICA ACTA
发表日期: 2011-10-10
DOI: 10.1016/j.aca.2011.07.041
卷: 703, 期:2, 页:187-193
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: The performances of three adsorbents, i.e. silica gel, neutral and basic alumina, in the separation of short chain polychlorinated n-alkanes (sPCAs) from potential interfering substances such as polychlorinated biphenyls (PCBs) and organochlorine pesticides were evaluated. To increase the cleanup efficiency, a two-step cleanup method using silica gel column and subsequent basic alumina column was developed. All the PCB and organochlorine pesticides could be removed by this cleanup method. The very satisfying cleanup efficiency of sPCAs has been achieved and the recovery in the cleanup method reached 92.7%. The method detection limit (MDL) for sPCAs in sediments was determined to be 14 ng g(-1). Relative standard deviation (R.S.D.) of 5.3% was obtained for the mass fraction of sPCAs by analyzing four replicates of a spiked sediment sample. High resolution gas chromatography/electron capture negative ion-low resolution mass spectrometry (HRGC/ECNI-LRMS) was used for sPCAs quantification by monitoring [M-HCl](center dot-) ions. When applied to the sediment samples from the mouth of the Daliao River, the optimized cleanup method in conjunction with HRGC/ECNI-LRMS allowed for highly selective identifications for sPCAs. The sPCAs levels in sediment samples are reported to range from 53.6 ng g(-1) to 289.3 ng g(-1). C(10)-and C(11)-PCAs are the dominant residue in most of investigated sediment samples. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: COLUMN GC/ECNI-MS ;  CHLORINATED PARAFFINS ;  ENVIRONMENTAL-SAMPLES ;  LAKE-ONTARIO ;  QUANTIFICATION ;  IONIZATION ;  TOXAPHENE ;  STANDARD ;  PCBS
语种: 英语
WOS记录号: WOS:000295704300010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142459
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Gao, Yuan,Zhang, Haijun,Chen, Jiping,et al. Optimized cleanup method for the determination of short chain polychlorinated n-alkanes in sediments by high resolution gas chromatography/electron capture negative ion-low resolution mass spectrometry[J]. ANALYTICA CHIMICA ACTA,2011,703(2):187-193.
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