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Related Experiment Video

Updated: May 18, 2026

Measuring Dissolved Methane in Aquatic Ecosystems Using An Optical Spectroscopy Gas Analyzer

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Published on: July 26, 2024

[Studies on the data processing method in chlorine measurement by differential optical absorption spectroscopy

Cong-Lei Ye¹, Pin-Hua Xie, Min Qin

¹Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China. clye@aiofm.ac.cn

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu

|September 29, 2012

Summary

This study demonstrates that polynomial fitting accurately retrieves chlorine concentration using Differential Optical Absorption Spectroscopy (DOAS). This method offers a feasible and precise approach for chlorine detection.

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Dynamic Electrochemical Measurement of Chloride Ions

Dynamic Electrochemical Measurement of Chloride Ions

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Dynamic Electrochemical Measurement of Chloride Ions

Dynamic Electrochemical Measurement of Chloride Ions

Published on: February 5, 2016

Area of Science:

Atmospheric Chemistry
Spectroscopy
Analytical Chemistry

Context:

Accurate measurement of atmospheric pollutants is crucial for environmental monitoring.
Differential Optical Absorption Spectroscopy (DOAS) is a widely used technique for gas analysis.
Developing robust methods for chlorine detection is essential for industrial safety and environmental studies.

Purpose:

To evaluate the effectiveness of different data processing methods for chlorine detection using DOAS.
To compare triangle filtering and polynomial fitting for analyzing chlorine absorption spectra.
To determine the optimal polynomial order for accurate chlorine concentration retrieval.

Summary:

Experimental measurements of chlorine were conducted using a laboratory-built DOAS system.
Two methods, triangle filtering and polynomial fitting, were applied to standard chlorine cross-sections.
Fifth-order polynomial fitting demonstrated superior accuracy and linearity (0.9961) for chlorine retrieval compared to triangle filtering, with minimal spectral residuals.

Impact:

The study validates polynomial fitting as a feasible and accurate method for chlorine detection via DOAS.
This technique provides a reliable tool for monitoring chlorine concentrations in various settings.
The findings contribute to advancing spectroscopic methods for environmental and industrial gas analysis.