A novel phosphate detection sensor: From FTIR to EC-QCL

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2024-10-24 DOI:10.1016/j.saa.2024.125331

Tianyi Shen , Shichen Gao , Yachao Liu , Siyu Wang , Daming Dong

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引用次数: 0

Abstract

Excessive discharges of industrial and domestic sewage containing high concentrations of phosphorus are causing damage to the environment, so the detection of these pollutants in bodies of water is extremely critical. External cavity quantum cascade laser (EC-QCL) spectroscopy is a novel measurement technology that surpasses conventional infrared spectroscopy techniques. In this research, we propose a transmission detection system with a long optical path based on an EC-QCL for the detection of phosphate concentration in water bodies. Linear regression models were established based on this detection system, with all determination coefficients higher than 0.98 and a minimum detection limit smaller than 5.1 ppm. Additionally, the high-power spectral density of the EC-QCL permits the construction of a model using the raw radiation intensity data, as opposed to the conventional technique which depends on a reference background. The results show that the overall performance of the model based on the raw radiation intensity is similar to that of the model based on absorbance data. The EC-QCL detection system proposed in this study can ensure accuracy in the detection of pollutants, and the advantage of miniaturization provides a novel idea for the following development of portable phosphate in-situ sewage detection sensors.

Abstract Image

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新型磷酸盐检测传感器：从 FTIR 到 EC-QCL。

过量排放含有高浓度磷的工业和生活污水正在对环境造成破坏，因此检测水体中的这些污染物极为重要。外腔量子级联激光（EC-QCL）光谱是一种新型测量技术，它超越了传统的红外光谱技术。在这项研究中，我们提出了一种基于 EC-QCL 的长光路透射检测系统，用于检测水体中的磷酸盐浓度。基于该检测系统建立了线性回归模型，所有确定系数均高于 0.98，最低检测限小于 5.1 ppm。此外，EC-QCL 的高功率光谱密度允许使用原始辐射强度数据构建模型，而不是依赖参考背景的传统技术。结果表明，基于原始辐射强度的模型与基于吸光度数据的模型总体性能相似。本研究提出的 EC-QCL 检测系统可确保污染物检测的准确性，其微型化优势为后续开发便携式磷酸盐原位污水检测传感器提供了新思路。

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

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.