自然海水試料を用いたアンモニア分析二法(Solorzano法およびSasaki-Sawada法)の比較

概要

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Comparison of two methods of ammonia analyses (Solorzano method and Sasaki-Sawada method) were carried out using natural seawater samples. The regression equation between the two series of analytical values was Y=0.39+0.95X (Y, Sasaki-Sawada method; X, Solorzano method), and the correlation coefficient was 0.991. The slope of the regression line, however, was significantly different from 45゜ (Y=X), and the Y-intercept did not pass through the origin. Solorzano method showed higher reagent blank, which may be due to the contamination in sodium hypochlorite. The molar absorption coefficient of Sasaki-Sawada method (1.85 × 10^4) was slightly higher than that of Solorzano method (1.60 × 10^4), which means that the former can be more sensitive. From these results, in addition to the easiness in the procedure and the applicability to samples of broad salinity range, Sasaki-Sawada method is recommended to be employed for the routine ammonia analysis at coastal experimental stations.
日本海洋学会の論文
1994-06-30