Evaluation of a modified halo flowing atmospheric pressure afterglow ion source for the analysis of directly injected volatile organic compounds,Journal of Analytical Atomic Spectrometry

当前位置： X-MOL 学术 › J. Anal. At. Spectrom. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Evaluation of a modified halo flowing atmospheric pressure afterglow ion source for the analysis of directly injected volatile organic compounds
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2020-07-14 , DOI: 10.1039/d0ja00140f
Jonatan Fandino _{1,

2,

3,

4,

5} , Jaime Orejas _{1,

2,

3,

4,

5} , Laura Chauvet _{6,

7,

8,

9} , David Blanco _{3,

5,

10,

11} , Philippe Guillot _{12,

13,

14,

15,

16} , Jorge Pisonero _{1,

2,

3,

4,

5} , Nerea Bordel _{1,

2,

3,

4,

5}

Affiliation

Grupo de Espectroscopía Láseres y Plasmas (GELP)
Department of Physics
University of Oviedo
Mieres
Spain
Experimental Physics II-Reactive Plasmas
Ruhr-Universität Bochum
D-44780 Bochum
Germany
Department of Construction and Manufacturing Engineering
Gijón
Laboratoire Dignostics des Plasmas Hors Equilibre (DPHE)
University of Toulouse
INU Champollion
Albi
France

A modified halo-shaped Flowing Atmospheric Pressure Afterglow (h-FAPA) source is coupled to an Atmospheric Pressure Interface Time of Flight Mass Spectrometer (API-TOFMS) for the analysis of gas samples. The h-FAPA is an ionization source easy to manufacture, operate and handle, and with low consumption in terms of gas flow rates and electric power. The analytical performance of this plasma-based ambient ionization source is evaluated for the direct analysis of VOCs, using benzene as a model compound. The influence of the different operating parameters, such as sampling distance, discharge current, and gas flow rates, is evaluated to optimize the detection of the benzene molecular ion. Matrix effects are evaluated using mixtures of different VOCs, and spiked synthetic air and human breath. Quantitative recoveries of benzene concentrations are around 100% in different VOC mixtures, showing low matrix effects. Moreover, calibration curves with similar sensitivities for benzene are obtained using spiked synthetic air and human breath. Limits of detection are in the order of 1 ng L⁻¹ in both cases.

中文翻译：

评估改进的晕环流动大气压余辉离子源，以分析直接注入的挥发性有机化合物

修改后的晕形流动大气压余辉（h-FAPA）源与大气压界面飞行时间质谱仪（API-TOFMS）耦合，用于分析气体样品。h-FAPA是易于制造，操作和处理的电离源，在气体流速和电功率方面消耗低。使用苯作为模型化合物，可对这种基于等离子体的环境电离源的分析性能进行评估，以直接分析VOC。评估了不同操作参数（如采样距离，放电电流和气体流速）的影响，以优化对苯分子离子的检测。使用不同VOC的混合物，加标的合成空气和人的呼吸来评估基质效应。在不同的VOC混合物中，苯浓度的定量回收率约为100％，显示出较低的基质效应。此外，使用加标的合成空气和人的呼吸可以获得对苯具有相似灵敏度的校准曲线。检出限约为1 ng L在两种情况下均为^-1。

更新日期：2020-09-02

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11