An improved wet oxidation method for radiocarbon analysis of dissolved organic carbon in a simulated freshwater matrix
Bibliographic Data
| ID | 9243727 |
|---|---|
| Authors | Hui Nai (0000-0001-9168-7861, UNSW Sydney), William T Hiscock (UNSW Sydney) |
| Year | 2025 |
| Volume | 67 |
| Issue | 6 |
| Pages | 1215-1222 |
| Publication date | 2025-12-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/rdc.2025.10152 |
| OpenAlex | W4415348994 |
| Language | EN |
| References cited | 34 |
The analysis of the radiocarbon age of dissolved organic carbon (DOC) is fundamental for understanding the aquatic component of the global carbon cycle, yet the technique is not routinely available at radiocarbon laboratories. This study presents validation experiments for an improved wet oxidation method for 14 C-DOC analysis in a freshwater matrix. Emphasis in design protocol for the method was placed on the quantitative removal of inorganic carbon, and a background level consistent with modern accelerator mass spectrometry (AMS) radiocarbon measurements. The method utilizes a pre-oxidized potassium persulfate oxidant in crimp-sealed vials with rigorous multi-stage helium purging to achieve and maintain a sample without atmosphere carbon dioxide and the contamination of modern 14 C ( 14 C-free). Method validation of 14 C-free samples are demonstrated with procedural blanks, phthalic anhydride (PhA), and an International Atomic Energy Agency Oxalic Acid standard (IAEA-C8)
Accelerator mass spectrometry · Carbon dioxide · Carbon fibers · Dissolved organic carbon · Mass spectrometry · Oxalic acid · Potassium persulfate · Radiocarbon dating · Radionuclide · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Marine and coastal ecosystems
Micadas
Radiocarbon in Dissolved Organic Carbon by Uv Oxidation
Radiocarbon Protocols and First Intercomparison Results From the Chronos 14 Carbon-Cycle Facility, University of New South Wales, Sydney, Australia
Rapid 14 C Analysis of Dissolved Organic Carbon in Non-Saline Waters
Determination of the Total 14 C Concentration of Water Samples Using the Cod Method and Ams
Are Compact AMS Facilities a Competitive Alternative to Larger Tandem Accelerators
Micadas
C Contamination Testing in Natural Abundance Laboratories
Sample Preparation of Dissolved Organic Carbon in Groundwater for AMS 14 C Analysis
New 14 C Reference Materials with Activities of 15 and 50 pMC
A Simple Co 2 Extraction Method for Radiocarbon Analyses of Dissolved Inorganic Carbon in Water Samples Without a Carrier Gas
An improved setup for radiocarbon analysis of water-soluble organic carbon in environmental matrices
| Highly cited | No |
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