Development of a novel solid-phase extraction element for thermal desorption gas chromatography analysis.
Development of a novel solid-phase extraction element for thermal desorption gas chromatography analysis.
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DOI：
10.1016/j.chroma.2004.02.059
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
Lili Wang;A. Hosaka;C. Watanabe;H. Ohtani;S. Tsuge
中科院分区：
文献类型：
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作者：
Lili Wang;A. Hosaka;C. Watanabe;H. Ohtani;S. Tsuge
由于聚二甲基硅氧烷(PDMS)比传统的注射式固相微萃取(SPME)具有更多的聚二甲基硅氧烷(PDMS)吸附剂，因此开发了一种新型固相萃取元件，用于从液体样品中吸附富集稀释物，具有较高的萃取效率。拔牙元件为钛(钛)开管(30 mm×1.2 mm i)。D.×1.6 mm o.d.)涂有一层化学结合的聚二甲基硅氧烷(厚度为500μm)。将该萃取元件与热解吸-气相色谱-质谱联用技术相结合，对水样中典型除草剂甲基溴氰菊酯进行了萃取分析，其浓度范围为2.5~2.5×10 4 ng/L，线性关系良好，回归系数为0.992.0 5。方法的检出限为0.5 ng/L水平，10 ng/L水平下的测定重现性较好，相对标准偏差小于7.5%。
A novel solid-phase extraction element is developed for sorptive enrichment of dilute analytes from liquid samples with high extraction efficiencies due to its larger amounts of polydimethylsiloxane (PDMS) absorbent than the conventional syringe type of solid-phase microextraction (SPME). The extraction element is made of titanium (Ti) open tubular tube (30 mm ×1.2 mm i . d .×1.6 mm o . d . ) coated with a chemically bonded layer of PDMS (500μm in thickness). The extraction element combined with thermal desorption–gas chromatography–mass spectrometry using a pyrolysis–gas chromatography–mass spectrometry system was used to extract and analyze a typical herbicide, bethrodine in water samples over a concentration range from 2.5 to 2.5×104ng/l. Thus obtained calibration curve showed good linearity for the tested whole concentration range with regression coefficient of 0.992. Detection limit of 0.5ng/l level was achieved and the reproducibility of the measurements for bethrodine at 10ng/l level was found to be fairly good with relative standard deviation below 7.5%.