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ID 33024
フルテキストURL
著者
Burakham, Rodjana Department of Chemistry, Faculty of Science, Chiang Mai University
大島 光子 Department of Chemistry, Faculty of Science, Okayama University
Grudpan, Kate Department of Chemistry, Faculty of Science, Chiang Mai University
本水 昌二 Department of Chemistry, Faculty of Science, Okayama University
抄録

A novel spectrophotometric reaction system was developed for the determination of nitrite as well as nitrate in water samples, and was applied to a flow-injection analysis (FIA). The spectrophotometric flow-injection system coupled with a copperised cadmium reductor column was proposed. The detection was based on the nitrosation reaction between nitrite ion and phloroglucinol (1,3,5-trihydroxybenzene), a commercially available phenolic compound. Sample injected into a carrier stream was split into two streams at the Y-shaped connector. One of the streams merged directly and reacted with the reagent stream: nitrite ion in the samples was detected. The other stream was passed through the copperised cadmium reductor column, where the reduction of nitrate to nitrite occurred, and the sample zone was then mixed with the reagent stream and passed through the detector: the sum of nitrate and nitrite was detected. The optimised conditions allow a linear calibration range of 0.03-0.30 mug NO2--N ml(-1) and 0.10-1.00 mug NO3--N ml(-1). The detection limits for nitrite and nitrate, defined as three times the standard deviation of measured blanks are 2.9 ng NO2--N ml(-1) and 2.3 ng NO3--N ml(-1), respectively. Up to 20 samples can be analyzed per hour with a relative standard deviation of less than 1.5%. The proposed method could be applied successfully to the simultaneous determination of nitrite and nitrate in water samples.

キーワード
Flow-injection analysis
Phloroglucinol
Nitrite
Nitrate
Simultaneous determination
備考
Published with permission from the copyright holder.
This is a author's copy,as published in TALANTA , 2004 Vol.64 Issue.5 pp.1259-1265
Publisher URL: http://dx.doi.org/10.1016/j.talanta.2004.03.059
Direct access to Thomson Web of Science record
(C) 2004 by Elsevier B.V
発行日
2004-12-15
出版物タイトル
Talanta
64巻
5号
開始ページ
1259
終了ページ
1265
資料タイプ
学術雑誌論文
言語
English
査読
有り
DOI
Web of Sience KeyUT
Submission Path
analytical_chemistry/21