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首页> 外文期刊>Journal of the Brazilian Chemical Society >Evaluation of a PVC sensing phase for determination of chlorinated hydrocarbons in water by mid-infrared spectroscopy
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Evaluation of a PVC sensing phase for determination of chlorinated hydrocarbons in water by mid-infrared spectroscopy

机译：中红外光谱法测定PVC感测相以确定水中氯代烃的评估

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In this work, mid-infrared spectroscopy has been employed to investigate the effect of amount (25 or 40%) and type of plasticiser (di-2-ethylhexyl sebacate (DOS), di-2-ethylhexyl phthalate (DOP) and 2-nitrophenyl octyl ether (NPOE)) on the analytical response of a poly(vinylchloride) (PVC) sensing phase for the determination of the chlorinated hydrocarbons (chlorobenzene (ClB), trichloroethylene (TCE) and trichlorobenzene (TCB)) in water. It was observed that films with 40% of plasticiser provided higher sensitivity and lower limits of detection than those with 25%, although the later films are easier to handle. A similar behaviour was also observed for sensing phases prepared with the plasticisers NPOE and DOS. By employing a DOS-based PVC sensing phase and extraction time of 60 min, limits of detection of 0.3, 0.6, and 0.5 mg L-1 were obtained for chlorobenzene, trichloroethylene and trichlorobenzene, respectively.
机译：在这项工作中，已采用中红外光谱法研究了增塑剂的用量（25％或40％）和类型（癸二酸二-2-乙基己酯（DOS），邻苯二甲酸二-2-乙基己酯（DOP）和2-硝基苯基辛基醚（NPOE））对聚氯乙烯（PVC）传感相的分析响应，用于测定水中的氯代烃（氯苯（ClB），三氯乙烯（TCE）和三氯苯（TCB））。可以观察到，增塑剂含量为40％的薄膜比那些增塑剂含量为25％的薄膜具有更高的灵敏度和更低的检测限，尽管后期的薄膜更易于处理。对于使用增塑剂NPOE和DOS制备的感测相，也观察到了类似的行为。通过使用基于DOS的PVC感测相和60分钟的提取时间，分别获得了0.3、0.6和0.5 mg L-1的氯苯，三氯乙烯和三氯苯的检出限。

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