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ID 19941
フルテキストURL
著者
坪井 知則 The Chugoku Electric Power Co., Inc. Technical Research Center
平野 義男 The Chugoku Electric Power Co., Inc. Technical Research Center
柴田 佳典 Chuden Kankyo Technos Co., Ltd.
本水 昌二 岡山大学
抄録
The sensitivity improvement of a flow-injection spectrophotometric method for the determination of ammonia was examined based on an indophenol blue coloration reaction with salicylate and hypochlorite in the presence of manganese(II) as a reaction promotion catalyst. The optimal conditions for achieving higher sensitivity of ammonia determination were examined using a three-line flow system. The limit of detection corresponding to a signal-to-noise ratio (S/N) of 3 was 0.005 mg l(-1) (≡ 5 ppb) of NH(4)(+). A calibration graph was linear in the range from 5 ppb to 1000 ppb of ammonium ion. The relative standard deviations (n=9) for 50 ppb and 100 ppb of ammonium ion were 6.4% and 2.2%, respectively. The proposed method was applied to the determination of ammonia in the exhaust gas of a thermal power plant. Prior to the FIA determination, ammonia in the exhaust gas was absorbed into a boric acid solution; the absorption solution was then analyzed by the proposed FIA.
発行日
2002-10-10
出版物タイトル
Analytical Sciences
18巻
10号
出版者
日本分析化学会
開始ページ
1121
終了ページ
1125
ISSN
0910-6340
NCID
AA10500785
資料タイプ
学術雑誌論文
言語
English
OAI-PMH Set
岡山大学
著作権者
日本分析化学会
論文のバージョン
publisher
DOI