Spherical Acoustic Resonator-Based Quartz-Enhanced Photoacoustic-Photothermal Dual Spectroscopy Sensing.

IF 6.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Analytical Chemistry Pub Date : 2025-09-09 DOI:10.1021/acs.analchem.5c04071

Chenzhao Sang,Chu Zhang,Runqiu Wang,Shunda Qiao,Ying He,Yufei Ma

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引用次数: 0

Abstract

In this paper, a single-quartz-enhanced photoacoustic-photothermal dual spectroscopy sensor based on a spherical acoustic resonator (SAR) is reported for the first time. The dual spectroscopy of quartz-enhanced photoacoustic spectroscopy (QEPAS) and quartz-enhanced photothermal spectroscopy (QEPTS), utilizing a single quartz tuning fork (QTF), eliminates the frequency mismatch issue that occurs when multiple QTFs are used. The dual spectroscopy model was constructed using the finite element method, which provides numerical simulation support for subsequent experiments. The first-order radial resonant frequency of the SAR was designed to match the resonant frequency (f0) of the QTF for resonance enhancement, and the radius of the SAR was determined as 27.48 mm from both theoretical and simulation analyses. A self-designed T-head QTF was utilized as the detector in this dual spectroscopy sensor. The performance of the dual spectroscopy sensor was verified by selecting acetylene (C2H2) as the target gas. Compared to the SAR-free single-quartz-enhanced photoacoustic-photothermal dual spectroscopy and the traditional QEPAS, the SAR-based single-quartz-enhanced photoacoustic-photothermal dual spectroscopy demonstrated 5.24-fold and 26.94-fold improvements in signal level, respectively. Allan deviation analysis revealed that the sensor's minimum detection limit (MDL) could reach 70.75 ppb with an average time of 500 s.

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基于球形声谐振器的石英增强光声-光热双光谱传感。

本文首次报道了一种基于球形声谐振器（SAR）的单石英增强光声-光热双光谱传感器。石英增强光声光谱（QEPAS）和石英增强光热光谱（QEPTS）的双光谱，利用单个石英音叉（QTF），消除了使用多个QTF时出现的频率不匹配问题。采用有限元法建立了双光谱模型，为后续实验提供了数值模拟支持。设计SAR的一阶径向共振频率与QTF的共振频率（f0）相匹配以增强共振，通过理论分析和仿真分析确定SAR的半径为27.48 mm。该双光谱传感器采用自行设计的t头QTF作为探测器。选择乙炔（C2H2）作为目标气体，对双光谱传感器的性能进行了验证。与无sar的单石英增强光声光热双光谱和传统QEPAS相比，基于sar的单石英增强光声光热双光谱的信号水平分别提高了5.24倍和26.94倍。Allan偏差分析表明，该传感器的最小检测限（MDL）可达到70.75 ppb，平均时间为500 s。

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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来源期刊

Analytical Chemistry 化学-分析化学

CiteScore

12.10

自引率

12.20%

发文量

1949

审稿时长

1.4 months

期刊介绍： Analytical Chemistry, a peer-reviewed research journal, focuses on disseminating new and original knowledge across all branches of analytical chemistry. Fundamental articles may explore general principles of chemical measurement science and need not directly address existing or potential analytical methodology. They can be entirely theoretical or report experimental results. Contributions may cover various phases of analytical operations, including sampling, bioanalysis, electrochemistry, mass spectrometry, microscale and nanoscale systems, environmental analysis, separations, spectroscopy, chemical reactions and selectivity, instrumentation, imaging, surface analysis, and data processing. Papers discussing known analytical methods should present a significant, original application of the method, a notable improvement, or results on an important analyte.