title: Ammonium detection by formation of colored zebra-bands in a detecting tube.
abstract: Ammonium ion was colorized by means of a diazo coupling reaction with 2-phenylphenol, where the color development reaction was conducted within 3min by using boric acid as a catalyst. The resulting colored solution (0.5ml) was supplied by suction to a detecting tube consisting of a nonwoven fabric test strip (2mm wide, 1mm thick, 150mm long) impregnated with benzylcetyldimethylammonium chloride in a stripe pattern and enclosed in a heat-shrinkable tube. When the colored solution was supplied to the detecting tube, blue zebra-bands formed, and the ammonium concentration was determined by counting the number of zebra-bands. The detection range was 1-20mg-Nl(-1). Ammonium ion in actual domestic wastewater samples was successfully detected by means of this method.
authors.affiliation: Department of Ecological Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Japan. kiso@eco.tut.ac.jp
authors.forename: Tatsuaki
authors.initials: T
authors.lastname: Hori
authors.forename: Keizou
authors.initials: K
authors.lastname: Niki
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kiso
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Oguchi
authors.forename: Yuki
authors.initials: Y
authors.lastname: Kamimoto
authors.forename: Toshiro
authors.initials: T
authors.lastname: Yamada
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nagai
mesh_terms: D000327:Adsorption; D002138:Calibration; D002623:Chemistry Techniques, Analytical; D005374:Filtration; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D012621:Seasons; D012996:Solutions; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000644:Quaternary Ammonium Compounds; D012996:Solutions; D014874:Water Pollutants, Chemical