A Comparison Study of Method for Determination of Total Dissolved Nitrogen
Institute of Oceanography and Environment and Environmental Research Group, Department of Chemical Sciences, Faculty of Science & Technology, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu (Malaysia).
Corresponding Author: Email: miman@umt.edu.my
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This paper describes the experiments carried out to analyse total dissolved N involving UV oxidation and high temperature catalytic oxidation (HTCO) methods. Standards of known N concentrations (i.e. ammonium and EDTA) irradiated with UV oxidation for 6 h were found to show good oxidation efficiency (72-107%). However, poor recovery was recorded for urea (2-20%). The addition of reaction initiator (H2O2) did not show any significantly difference to the oxidation efficiency of all three compounds. Based on the analysis of seawater samples, UV oxidation method was less efficient (> 90%) of converting organic N to inorganic N relative to HTCO.
KEYWORDS:UV oxidation; High temperature catalytic oxidation; Total dissolved nitrogen
