Chloride Interferences in Wet Chemical Oxidation Measurements: Plausible Mechanisms and Implications.

ABSTRACT: Wet chemical oxidation (WCO) methods measure total organic carbon (TOC) in aqueous solutions through the formation and detection of carbon dioxide (CO₂). Prior research documents chloride (Cl^-) interference during WCO. However, the mechanism that determines WCO interference is not established. We investigate WCO and find that formic acid exhibits TOC recovery (89-108%) within measurement uncertainty in the presence of Cl^-, while acetic acid recovery is substantially reduced (3-67%). We postulate that chlorine radical (^•Cl) formation during WCO alters oxidation pathways for organic compounds with methyl groups to form stable halogenated organic species that are thus not detected as CO₂, reducing observed TOC recovery. We develop a kinet

SUBMITTER: Chiu YTT 

PROVIDER: S-EPMC11650627 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature