A brief overview of modern directions in marine DOC studies Part I.—Methodological aspects
| Autor: | Evgeny V. Dafner, Peter J. Wangersky |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Engineering
business.industry Public Health Environmental and Occupational Health Water chemistry.chemical_element Oxidation reduction General Medicine Management Monitoring Policy and Law Field analysis Carbon Carbon cycle Oxygen Solubility chemistry Reference Values Environmental chemistry Calibration Dissolved organic carbon Total nitrogen Seawater Sample collection business Oxidation-Reduction Environmental Monitoring |
| Zdroj: | Journal of Environmental Monitoring. 4:48-54 |
| ISSN: | 1464-0333 1464-0325 |
| DOI: | 10.1039/b107277n |
| Popis: | The necessity for determining the role of dissolved organic carbon (DOC) in the global carbon cycle stimulated the development of different methods of DOC analysis in aquatic environments. Progress in this direction has been made by oceanographers who developed and introduced a high-temperature catalytic oxidation (HTC) method for low organic carbon concentrations. Today this method is the reference method for marine DOC study. The combination of available reference materials and the participation in intercalibration exercises has resulted in both an increased accuracy and higher precision for this method. The HTC method completely oxidizes the more resistant DOC; makes information rapidly available following the completion of the field analysis; provides a high precision (down to 0.5 microM C); covers the range of seawater DOC concentrations (35-80 microM C and higher); with certain modifications it has proved to be both seaworthy and amenable to automated analysis; and the reliable and relatively easy to operate HTC analyzer is commercially available and easily combined with a total nitrogen analyzer for simultaneous measurements of both parameters in the same sample. In this review we summarize some aspects of sample collection, handling and the analytical chemistry of the DOC analysis by the HTC technique in marine study. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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