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首页> 外文期刊>New Journal of Chemistry >A non-ionic surfactant-mediated sol-gel coating for solid-phase microextraction of benzene, toluene, ethylbenzene and o-xylene in water samples using a gas chromatography-flame ionization detector
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A non-ionic surfactant-mediated sol-gel coating for solid-phase microextraction of benzene, toluene, ethylbenzene and o-xylene in water samples using a gas chromatography-flame ionization detector

机译：非离子表面活性剂介导的溶胶-凝胶涂层，用于使用气相色谱-火焰电离检测器固相微萃取水中的苯，甲苯，乙苯和邻二甲苯

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In this study, sol-gel hybrid organic-inorganic materials were prepared in the presence of polyethyleneoxide (PEO) non-ionic surfactants (Triton X-100), which act as co-porogenic agents. For the first time, non-ionic surfactant mediated sol-gel coatings were evaluated by analyzing benzene, toluene, ethylbenzene and o-xylene (BTEX) in the aqueous samples. Two different fiber coatings were prepared including: un-modified poly(dimethylsiloxane) (PDMS) coating prepared from PDMS in the absence of Triton X-100 as a non-ionic surfactant (PDMS-no TX100), and modified PDMS coating prepared from this polymer in the presence of Triton X-100 as a porogenic agent and conditioned at a higher temperature than decomposition temperature of a non-ionic surfactant (PDMS-TX100). After the analytical procedure was optimized, the dynamic linear range obtained using PDMS-TX100 and PDMS-no TX100 fibers was 4-200000 and 100-200 000 pg mL~(-1) and the limits of detection (S/N = 3) were 1-3 and 30-300 pg mL~(-1), respectively. The relative standard deviations (RSDs) for one fiber (repeatability) (n = 5) were from 3.1 up to 6.2% and between fibers or batch to batch (reproducibility) (n = 3) in the range of 4.2-7.7% for three fibers. The developed method was successfully applied to the real water samples while the relative recovery percentages obtained for the spiked water samples at 20 pg mL~(-1) of each analyte were from 94.41 to 104.05%.
机译：在这项研究中，溶胶-凝胶杂化有机-无机材料是在聚环氧乙烷（PEO）非离子表面活性剂（Triton X-100）存在的情况下制备的，该表面活性剂可作为共致孔剂。首次通过分析水性样品中的苯，甲苯，乙苯和邻二甲苯（BTEX）评估了非离子表面活性剂介导的溶胶-凝胶涂料。制备了两种不同的纤维涂层，包括：在没有Triton X-100作为非离子表面活性剂的情况下由PDMS制备的未改性聚二甲基硅氧烷（PDMS）涂层，以及由此制备的改性PDMS涂层。在Triton X-100作为致孔剂的情况下，该聚合物可在比非离子表面活性剂（PDMS-TX100）的分解温度更高的温度下进行调节。优化分析程序后，使用PDMS-TX100和PDMS-no TX100纤维获得的动态线性范围为4-200000和100-200 000 pg mL〜（-1），检出限（S / N = 3）分别为1-3和30-300 pg mL〜（-1）。一根纤维的相对标准偏差（RSD）（重复性）（n = 5）从3.1到6.2％，纤维或批次之间的相对标准偏差（可重复性）（n = 3）在三根纤维之间为4.2-7.7％纤维。该方法成功应用于实际水样中，加标水样在每种分析物的浓度为20 pg mL〜（-1）时的相对回收率为94.41％至104.05％。

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