Concentration of Some Metal Ions Using 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol and C18-Bonded Silica Gel

被引：0
|
作者：
Koichi Nakagawa
Kensaku Haraguchi
Toshio Ogata
Takunori Kato
Yukinori Nakata
Kunihiko Akatsuka
机构：
[1] Hokkaido National Industrial Research Institute,
[2] Hokkaido Institute of Environmental Science,undefined
[3] Kitami Institute of Technology,undefined
来源：
Analytical Sciences | 1998年 / 14卷
关键词：
Concentration; trace metals; 2-(5-bromo-2-pyridylazo)-5-(; -propyl-; -sulfopropylamino)phenol; C; -bonded silica gel; sodium salt reagent;
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摘要：
A simple and reliable concentration method of trace metals in aqueous solution is proposed. 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol is used to form water-soluble metal chelates. The chelated metal ions are concentrated from dilute solution by adsorption onto a C18-bonded silica gel column. The adsorbed chelates are eluted with methanol and 1.0 mol dm–3 HCl and determined by ICP-AES or flame AAS. The proposed method is applied to the determination of heavy metal impurities in some commercial sodium salt reagents.
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页码：317 / 320
页数：3
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