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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Enhancing sensitivity and selectivity in the determination of aldehydes in olive oil by use of a Tenax TA trap coupled to a UV-ion mobility spectrometer
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Enhancing sensitivity and selectivity in the determination of aldehydes in olive oil by use of a Tenax TA trap coupled to a UV-ion mobility spectrometer

机译：通过使用Tenax TA捕集器与UV-离子迁移谱仪耦合来提高橄榄油中醛类的测定灵敏度和选择性

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A Tenax TA trap was coupled to an ion mobility spectrometer in order to improve basic analytical properties such as sensitivity and selectivity. The analytical performance of this combination was assessed in the determination of volatile aldehydes between 3 and 6 carbon atoms present in olive oil. The aldehydes were extracted and adsorbed into the trap, from which they were thermally desorbed for analysis by UV-Ion Mobility Spectrometry (UV-IMS). Sensitivity was increased by the preconcentration step and selectivity by the combination of temperature programmed thermal desorption and the ability of the ion mobility spectrometer to monitor the desorbed analytes in real time. The limits of detection obtained were lower than 0.3mgkg~(-1) and the relative standard deviation lower than 10%. A one-way analysis of variance (ANOVA) was used to identify significant differences between olive oil grades in terms of peak heights for the target aldehydes.
机译：Tenax TA阱与离子迁移谱仪相连，以改善基本的分析性能，例如灵敏度和选择性。在测定橄榄油中存在的3至6个碳原子之间的挥发性醛时，评估了该组合的分析性能。提取醛并将其吸附到捕集阱中，然后对其进行热脱附，以进行紫外离子迁移谱（UV-IMS）分析。通过预浓缩步骤提高了灵敏度，通过程序升温热脱附和离子迁移谱仪实时监控脱附分析物的能力相结合，提高了选择性。检出限小于0.3mgkg〜（-1），相对标准偏差小于10％。使用单向方差分析（ANOVA）来确定橄榄油等级之间在目标醛的峰高方面的显着差异。

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