Laser-induced breakdown spectroscopy for the measurement of air humidity using spectral line intensity ratio.

Jianyong Cen, Xin Wang, Zeguang Li, Ni An, Jinjun Zhang

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Article in RSC advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Jianyong CenCollege of Physics and Electronic Engineering, Shanxi Normal University Taiyuan 030031 China zhangjinjun@sxnu.edu.cn.ORCID https://orcid.org/0000-0002-7476-8958

Xin WangCollege of Physics and Electronic Engineering, Shanxi Normal University Taiyuan 030031 China zhangjinjun@sxnu.edu.cn.

Zeguang LiCollege of Physics and Electronic Engineering, Shanxi Normal University Taiyuan 030031 China zhangjinjun@sxnu.edu.cn.

Ni AnCollege of Physics and Electronic Engineering, Shanxi Normal University Taiyuan 030031 China zhangjinjun@sxnu.edu.cn.

Jinjun ZhangCollege of Physics and Electronic Engineering, Shanxi Normal University Taiyuan 030031 China zhangjinjun@sxnu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Laser-induced breakdown spectroscopy (LIBS) is widely used in air environment. Humidity is an important parameter in the air environment, and its variation can affect the accuracy of LIBS. Therefore, measurement of humidity is very necessary when performing LIBS applications. We present a method for humidity measurement using laser-induced breakdown spectroscopy. The intensity ratio between spectral lines was used to establish the relationship with relative humidity. The relative humidity has a linear relationship with the intensity ratio of Hα 656.3 nm to N II 463.0 nm, N II 500.5 nm, N I 746.8 nm and O I 777.4 nm. The linearity can exceed 99.9%. The linear relationship was also used to measure the air humidity, and the measurement results were accurate. This study confirms the feasibility of using laser-induced breakdown spectroscopy to measure humidity. The advantage of this method is that when using LIBS applications, no other instruments are required to measure humidity.

Identifiers

PMID40740225

DOI10.1039/d5ra05015d

PMCPMC12308682

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LicenceCC BY

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.