Evaluation of Short-Term CO₂ Passive Sampler for Monitoring Atmospheric CO₂ Levels

• Published in: Journal of Climate Change Research Vol. 7; no. 1; pp. 1 - 8
• Main Authors: Yim, Bongbeen, Sim, Yoon-Ah, Kim, Sun-Tae
• Format: Journal Article
• Language: English
• Published: 한국기후변화학회 31.03.2016
• Subjects: 학제간연구; Barium Hydroxide; Sampling Rate; Carbon Dioxide; Turbidity; Passive Sampler
• ISSN: 2093-5919; 2586-2782
• DOI: 10.15531/ksccr.2016.7.1.1

In this study, we investigated the applicability of a short-term carbon dioxide (CO2) passive sampler using turbidity change in a solution containing barium hydroxide (Ba(OH)2). The mass of CO2 introduced into the Ba(OH)2 aqueous solution was strongly correlated (r2 = 0.9565) to the change in turbidity caused by its reaction with the solution. The sampling rates calculated for 1 h and 24 h were 42.4±5.4 mL min—1 and 2.3±0.3 mL min—1, respectively. Both unexposed (blank) and exposed samplers remained stable during the storage period of at least two weeks. The detection limits of the passive sampler for CO2 were 81.5 ppm for 1 h and 61.5 ppm for 24 h. Based on the results, the passive sampler using the change of turbidity in the Ba(OH)2 aqueous solution appears to be a suitable tool for measuring short-term atmospheric concentrations of CO2. KCI Citation Count: 0