Ocean Science
Ocean Science
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Articles | Volume 21, issue 4
Articles | Volume 21, issue 4
https://doi.org/10.5194/os-21-1395-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-21-1395-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 4
Technical note
 | 
21 Jul 2025
Technical note |  | 21 Jul 2025

Combining benzalkonium chloride addition with filtration to inhibit dissolved inorganic carbon alteration during the preservation of water sample in radiocarbon analysis

Hiroshi A. Takahashi and Masayo Minami

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Short summary
This study evaluates various treatments to prevent changes in dissolved inorganic carbon (DIC) during water sample preservation without HgCl₂ addition. We found that combining filtration with benzalkonium chloride (BAC) addition effectively stabilized DIC by inhibiting microbial activity for up to 41 weeks. This procedure provides a practical, environmentally friendly alternative to conventional mercury-disinfected methods, enduring effective water sample preservation in aquatic environments.
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