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New cloud vapor zone (CVZ) coupled headspace solid-phase microextraction technique
Huang, Yi-Ching; Su, Yi-Song; Muniraj, Sarangapani; Zhang, Weibing; Jen, Jen-Fon
关键词Cloud Vapor Zone Headspace Solid-phase Microextraction Chlorothalonil
刊名ANALYTICAL AND BIOANALYTICAL CHEMISTRY
2007-05-01
DOI10.1007/s00216-007-1212-4
388期:2页:377-383
收录类别ISTP ; SCI
文章类型Article
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]Biochemical Research Methods ; Chemistry, Analytical
研究领域[WOS]Biochemistry & Molecular Biology ; Chemistry
关键词[WOS]GAS-CHROMATOGRAPHY ; QUANTITATIVE EXTRACTION ; ELECTRON-CAPTURE ; WATER ; PESTICIDES ; CHLOROTHALONIL ; DEVICE
英文摘要A new cloud vapor zone (CVZ)-based headspace solid-phase microextraction (HS-SPME) technique has been demonstrated with the capability of heating the sample matrix and simultaneously cooling the sampling zone. A bi-temperature-controlled (BTC) system, allowing 10 mL of test sample heating and headspace external-cooling, was employed for the CVZ formation around the SPME-fiber sampling area. In the CVZ procedure, the heated headspace vapor undergoes a sudden cooling near the SPME to form a dense cloud of analyte-water vapor, which is helpful for adsorption or absorption of the analyte. The device was evaluated for the quantitative analysis of aqueous chlorothalonil. Parameters influencing sampling efficiency, e.g., SPME fiber coating, SPME sampling temperature and time, solution modifier, addition of salt, sample pH, and temperature, were investigated and optimized thoroughly. The proposed BTC-HS-SPME method afforded a best extraction efficiency of above 94% accuracy (less than 4.1% RSD, n = 7) by using the PDMS fiber to collect chlorothalonil in the headspace at 5 degrees C under the optimized condition, i.e., heating sample solution (added as 10% ethylene glycol and 30% NaCl, at pH 7.0) at 130 degrees C for 15 min. The detection was linear from 0.01 to 80 mu g L-1 with a regression coefficient of 0.9998 and had a detection limit of 3.0 ng L-1 based on S/N = 3. Practical application was demonstrated by analyzing chlorothalonil in farm water samples with promising results and recoveries. The approach provided a very simple, fast, sensitive, and solvent-free procedure to collect analytes from aqueous solution. The approach can provide a new platform for other sensitive HS-SPME assays.
语种英语
WOS记录号WOS:000246094000009
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140429
专题中国科学院大连化学物理研究所
作者单位1.Natl Chung Hsing Univ, Dept Chem, Taichung 40217, Taiwan
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Huang, Yi-Ching,Su, Yi-Song,Muniraj, Sarangapani,et al. New cloud vapor zone (CVZ) coupled headspace solid-phase microextraction technique[J]. ANALYTICAL AND BIOANALYTICAL CHEMISTRY,2007,388(2):377-383.
APA Huang, Yi-Ching,Su, Yi-Song,Muniraj, Sarangapani,Zhang, Weibing,&Jen, Jen-Fon.(2007).New cloud vapor zone (CVZ) coupled headspace solid-phase microextraction technique.ANALYTICAL AND BIOANALYTICAL CHEMISTRY,388(2),377-383.
MLA Huang, Yi-Ching,et al."New cloud vapor zone (CVZ) coupled headspace solid-phase microextraction technique".ANALYTICAL AND BIOANALYTICAL CHEMISTRY 388.2(2007):377-383.
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