A HIGH-TEMPERATURE CATALYTIC-OXIDATION METHOD FOR THE DETERMINATION OF MARINE DISSOLVED ORGANIC-CARBON AND ITS COMPARISON WITH THE UV PHOTOOXIDATION METHOD

被引：35
作者：
CHEN, WH
WANGERSKY, PJ
机构：
[1] Department of Oceanography, Dalhousie University, Halifax
来源：
MARINE CHEMISTRY | 1993年 / 42卷 / 02期
关键词：
D O I：
10.1016/0304-4203(93)90240-O
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A modified high-temperature catalytic oxidation (HTCO) method for marine dissolved organic carbon (DOC) measurement is described. The method has a high oxidation efficiency and a precision of 1-2%. It is robust and relatively easy to perform, and hence can be used for routine analyses. Components of the system blank are determined by the use of deionized water treated by high-temperature catalysed oxidation, and the results are checked by an experiment using C-14. Extensive comparisons between this method and UV photo-oxidation are presented. The HTCO method consistently yields 5-60% more DOC than the UV method, with most results in the range of 10-40%. No simple explanation has been found for the differences between the two methods, as a result of the complex nature of DOC in seawater.
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页码：95 / 106
页数：12
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