用排水の保存方法の検討(第2報)用排水中の窒素成分の保存方法

概要

論文の詳細を見る
A method for preservation of nitrogen in water and waste water was investigated. 1) In the case of strong acid condition, NO_2-N in water decreased, and in the sealed condition, NO_2-N was converted to NO_3-N almost quantitatively. 2) NH_3-N in water decreased at above pH 8.0. NO_3-N in water was stable under all the pH range. 3) When the sample was preserved at 5°, NH_8-N, NO_2-N, NO_3-N, and Kjeldahl-N in water did not change within 24 hr. 4) When chloroform was added to the sample as a preservation reagent, chloroform interfered negatively on the determination of NH_3-N in water by the indophenol method, and also interfered negatively on NO_3-N reduction by cadmium-copper column. It is recomended that the sample be adjusted to pH 4.0-8.0 region, covered with a stopper, preserved at 5°, and analyzed within 24 hr.
公益社団法人日本薬学会の論文
1979-06-30