Spectrophotometric Flow Injection Analysis for the Determination of Trace Amount of Ammonium Ion in Seawater Coupled with On-Line Gas Diffusion/Ion Exchange Concentration Technique

• FUKUI Keisuke

  Department of Applied Chemistry, Aichi Institute of Technology

• OHNO Shinsuke

  HME Co., Ltd.

• HIGUCHI Keiro

  Ogawa & Co., Ltd.

• TESHIMA Norio

  Department of Applied Chemistry, Aichi Institute of Technology

• SAKAI Tadao

  Department of Applied Chemistry, Aichi Institute of Technology

Bibliographic Information

Other Title

• オンラインガス拡散／イオン交換濃縮法を用いる海水中微量アンモニウムイオンのフローインジェクション吸光光度定量
• オンライン ガス カクサン イオン コウカン ノウシュクホウ オ モチイル カイスイチュウ ビリョウ アンモニウム イオン ノ フロー インジェクション キュウコウ コウド テイリョウ

Abstract

A highly sensitive spectrophotometric semi-automated method for ammonium ion determination was proposed using flow injection analysis coupled with an on-line gas diffusion separation/ion exchange concentration technique, which was especially effective for applying to analyses of open sea or fresh seawater. Ammonium ion at the single and/or sub-ppb level in seawater samples was introduced into a gas diffusion system at first, and then subsequently concentrated on a cation exchange resign column. The collected ammonium ion was eluted by 0.5 M hydrochloric acid. After derivatization based on indophenol blue with salicylate, the color development was monitored at 660 nm. The detection limit (3σ) for N -NH₄⁺ was 0.5 ppb at 10 minutes concentration and 0.2 ppb at 30 minutes concentration, respectively. The relative standard deviation (n = 5) was found to be 0.68% for 1 ppb of N -NH₄⁺ at 10 minutes concentration. The proposed method could be applicable to the analysis of ammonium ion in seawater samples.<br>

Journal

• BUNSEKI KAGAKU

  BUNSEKI KAGAKU 56 (9), 757-763, 2007

  The Japan Society for Analytical Chemistry

Keywords

• trace ammonium ion analysis
• seawater sample
• gas diffusion/ion exchange concentration
• spectrophotometric flow injection analysis

Details

• CRID: 1390001204356260864
• NII Article ID: 110006388493
• NII Book ID: AN00222633
• DOI: 10.2116/bunsekikagaku.56.757
• COI: 1:CAS:528:DC%2BD2sXhtFWqtLbF
• NDL BIB ID: 8945787
• ISSN: 05251931
• Web Site: http://id.ndl.go.jp/bib/8945787
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8945787
• Web Site: http://www.jstage.jst.go.jp/article/bunsekikagaku/56/9/56_9_757/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10896774
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed