Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter
The ocean is one of the most extensive ecosystems on Earth and can absorb large amounts of carbon dioxide. Changes in seawater carbon dioxide concentrations are one of the most important factors affecting marine ecosystems. Excess carbon dioxide can lead to ocean acidification, threatening the stabi...
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ftdoajarticles:oai:doaj.org/article:9661b0fd64b143d1af904b688b212843 2023-08-20T04:09:02+02:00 Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter Luyin Liu Ruzhang Liu Guochao Ma Shanshan Feng Yuanhui Mu Dexi Meng Shuying Wang Enlin Cai 2023-07-01T00:00:00Z https://doi.org/10.3390/s23146273 https://doaj.org/article/9661b0fd64b143d1af904b688b212843 EN eng MDPI AG https://www.mdpi.com/1424-8220/23/14/6273 https://doaj.org/toc/1424-8220 doi:10.3390/s23146273 1424-8220 https://doaj.org/article/9661b0fd64b143d1af904b688b212843 Sensors, Vol 23, Iss 6273, p 6273 (2023) marine ecology HITRAN infrared detection seawater carbon dioxide Chemical technology TP1-1185 article 2023 ftdoajarticles https://doi.org/10.3390/s23146273 2023-07-30T00:34:45Z The ocean is one of the most extensive ecosystems on Earth and can absorb large amounts of carbon dioxide. Changes in seawater carbon dioxide concentrations are one of the most important factors affecting marine ecosystems. Excess carbon dioxide can lead to ocean acidification, threatening the stability of marine ecosystems and species diversity. Dissolved carbon dioxide detection in seawater has great scientific significance. Conducting online monitoring of seawater carbon dioxide can help to understand the health status of marine ecosystems and to protect marine ecosystems. Current seawater detection equipment is large and costly. This study designed a low-cost infrared carbon dioxide detection system based on molecular theory. Using the HITRAN database, the absorption spectra and coefficients of carbon dioxide molecules under different conditions were calculated and derived, and a wavelength of 2361 cm −1 was selected as the measurement channel for carbon dioxide. In addition, considering the interference effect of direct light, an infrared post-splitting method was proposed to eliminate the interference of light and improve the detection accuracy of the system. The system was designed for the online monitoring of carbon dioxide in seawater, including a peristaltic pump to accelerate gas–liquid separation, an optical path structure, and carbon dioxide concentration inversion. The experimental results showed that the standard deviation of the gas test is 3.05, the standard deviation of the seawater test is 6.04, and the error range is within 20 ppm. The system can be flexibly deployed and has good stability and portability, which can meet the needs of the online monitoring of seawater carbon dioxide concentration. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Sensors 23 14 6273 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
marine ecology HITRAN infrared detection seawater carbon dioxide Chemical technology TP1-1185 |
spellingShingle |
marine ecology HITRAN infrared detection seawater carbon dioxide Chemical technology TP1-1185 Luyin Liu Ruzhang Liu Guochao Ma Shanshan Feng Yuanhui Mu Dexi Meng Shuying Wang Enlin Cai Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter |
topic_facet |
marine ecology HITRAN infrared detection seawater carbon dioxide Chemical technology TP1-1185 |
description |
The ocean is one of the most extensive ecosystems on Earth and can absorb large amounts of carbon dioxide. Changes in seawater carbon dioxide concentrations are one of the most important factors affecting marine ecosystems. Excess carbon dioxide can lead to ocean acidification, threatening the stability of marine ecosystems and species diversity. Dissolved carbon dioxide detection in seawater has great scientific significance. Conducting online monitoring of seawater carbon dioxide can help to understand the health status of marine ecosystems and to protect marine ecosystems. Current seawater detection equipment is large and costly. This study designed a low-cost infrared carbon dioxide detection system based on molecular theory. Using the HITRAN database, the absorption spectra and coefficients of carbon dioxide molecules under different conditions were calculated and derived, and a wavelength of 2361 cm −1 was selected as the measurement channel for carbon dioxide. In addition, considering the interference effect of direct light, an infrared post-splitting method was proposed to eliminate the interference of light and improve the detection accuracy of the system. The system was designed for the online monitoring of carbon dioxide in seawater, including a peristaltic pump to accelerate gas–liquid separation, an optical path structure, and carbon dioxide concentration inversion. The experimental results showed that the standard deviation of the gas test is 3.05, the standard deviation of the seawater test is 6.04, and the error range is within 20 ppm. The system can be flexibly deployed and has good stability and portability, which can meet the needs of the online monitoring of seawater carbon dioxide concentration. |
format |
Article in Journal/Newspaper |
author |
Luyin Liu Ruzhang Liu Guochao Ma Shanshan Feng Yuanhui Mu Dexi Meng Shuying Wang Enlin Cai |
author_facet |
Luyin Liu Ruzhang Liu Guochao Ma Shanshan Feng Yuanhui Mu Dexi Meng Shuying Wang Enlin Cai |
author_sort |
Luyin Liu |
title |
Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter |
title_short |
Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter |
title_full |
Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter |
title_fullStr |
Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter |
title_full_unstemmed |
Online Monitoring of Seawater Carbon Dioxide Based on an Infrared Rear Beam Splitter |
title_sort |
online monitoring of seawater carbon dioxide based on an infrared rear beam splitter |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/s23146273 https://doaj.org/article/9661b0fd64b143d1af904b688b212843 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Sensors, Vol 23, Iss 6273, p 6273 (2023) |
op_relation |
https://www.mdpi.com/1424-8220/23/14/6273 https://doaj.org/toc/1424-8220 doi:10.3390/s23146273 1424-8220 https://doaj.org/article/9661b0fd64b143d1af904b688b212843 |
op_doi |
https://doi.org/10.3390/s23146273 |
container_title |
Sensors |
container_volume |
23 |
container_issue |
14 |
container_start_page |
6273 |
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1774721674208346112 |