根据光学发射光谱识别不同类别的挥发性有机化合物--使用介质屏障氦等离子体与微型光谱仪耦合

IF 4.6 Q1 CHEMISTRY, ANALYTICAL ACS Measurement Science Au Pub Date : 2024-01-01 DOI:10.1021/acsmeasuresciau.3c00066
Jingqin Mao, Yahya Atwa, Zhenxun Wu, David McNeill and Hamza Shakeel*, 
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引用次数: 0

摘要

在这项研究中,利用三维打印和成型技术制造的微型氦介质阻挡放电(μHDBD)等离子体装置与微型光谱仪相结合,使用光学发射光谱法(OES)检测和识别不同类别的挥发性有机化合物(VOCs)。我们测试了属于三个不同类别(直链烷烃、芳烃和极性化合物)的 11 种挥发性有机化合物。我们的结果清楚地表明,不同类别的挥发性有机化合物的光学发射光谱显示出明显的差异,因此可用于识别。此外,具有相似结构的挥发性有机化合物(如正戊烷、正己烷、正庚烷、正辛烷和正壬烷)的发射光谱具有相似的光学发射光谱形状。丙酮和乙醇也具有相似的发射波长,但在浓度相同的情况下,它们显示出不同的线强度。我们还发现,芳烃的侧链基团也会影响发射光谱,尽管它们具有相似的结构(都有一个苯环)。此外,我们的 μHDBD-OES 系统还能识别挥发性有机化合物混合物中的多种化合物。我们的工作还证明了通过 OES 形状识别不同类别挥发性有机化合物的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Identification of Different Classes of VOCs Based on Optical Emission Spectra Using a Dielectric Barrier Helium Plasma Coupled with a Mini Spectrometer

In this study, a micro helium dielectric barrier discharge (μHDBD) plasma device fabricated using 3D printing and molding techniques was coupled with a mini spectrometer to detect and identify different classes of volatile organic compounds (VOCs) using optical emission spectrometry (OES). We tested 11 VOCs belonging to three different classes (straight-chain alkanes, aromatics, and polar organic compounds). Our results clearly demonstrate that the optical emission spectra of different classes of VOCs show clear differences, and therefore, can be used for identification. Additionally, the emission spectra of VOCs with a similar structure (such as n-pentane, n-hexane, n-heptane, n-octane, and n-nonane) have similar optical emission spectrum shape. Acetone and ethanol also have similar emission wavelengths, but they show different line intensities for the same concentrations. We also found that the side-chain group of aromatics will also affect the emission spectra even though they have a similar structure (all have a benzene ring). Moreover, our μHDBD-OES system can also identify multiple compounds in VOC mixtures. Our work also demonstrates the possibility of identifying different classes of VOCs by the OES shape.

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来源期刊
ACS Measurement Science Au
ACS Measurement Science Au 化学计量学-
CiteScore
5.20
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0.00%
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0
期刊介绍: ACS Measurement Science Au is an open access journal that publishes experimental computational or theoretical research in all areas of chemical measurement science. Short letters comprehensive articles reviews and perspectives are welcome on topics that report on any phase of analytical operations including sampling measurement and data analysis. This includes:Chemical Reactions and SelectivityChemometrics and Data ProcessingElectrochemistryElemental and Molecular CharacterizationImagingInstrumentationMass SpectrometryMicroscale and Nanoscale systemsOmics (Genomics Proteomics Metabonomics Metabolomics and Bioinformatics)Sensors and Sensing (Biosensors Chemical Sensors Gas Sensors Intracellular Sensors Single-Molecule Sensors Cell Chips Arrays Microfluidic Devices)SeparationsSpectroscopySurface analysisPapers dealing with established methods need to offer a significantly improved original application of the method.
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