총질소와 총인 수동 및 자동 분석의 비교평가(I)

Abstract

Automated instrumental analyses are introduced for the determination of total nitrogen (TN) and total phosphorus (TP) in water. Since the automatized analysis provide very reliable data with less labor and chemicals, it is considered as a replaceable technic for substituting the currently available manual method. Actually, this automated technic has been practically used for the determination TN and TP in compliance with water quality monitoring regulation in Korea. Automated method is also adapting the same operating principle of manual analysis which is approved by Ministry of Environment of Korea. Segmented flow analysis (SFA) system was applied for automated technic for the simultaneous determination of TN and TP. TN concentration data obtained by both manual and automated techniques are evaluated for the mutual comparability. Method detection level (MDL), precision, accuracy, interferences, etc. values were compared, either directly or after statistical treatment, to test equivalency between two methods. Automated method turned out to be at least equivalent or better than manual method in TN determination of relatively clean water sample. One of the main restrictions in broadening the application of automated method is found to be its narrow range of detection in analyzing water sample espcially ones containing high concentrated suspended solid. Particulate matters in water samples interfere the determination of TN concentration negatively, in general