title: Determination of sodium azide in beverages by ion chromatography.
abstract: A convenient method for determination of sodium azide in beverages using ion chromatography is described. This method combines the specificity for azide with a simple sample preparation using a bubble and trap apparatus that removes any interferences. Sodium azide in a sample was acidified, and the azide was converted to the volatile hydrazoic acid, which was trapped in 2.5 mM sodium hydroxide solution. Determination was performed by isocratic ion chromatography using suppressed conductivity detection. Calibration curves were linear for 0.5 to 20 microg/mL sodium azide and the detection limit was 0.05 microg/mL. Recoveries of sodium azide from spiked samples (10.0 microg/g) were more than 82.6%. The method was then used to analyze various beverages.
authors: Aichi Prefectural Institute of Public Health, Nagoya, Japan.
authors: H
authors: H
authors: Oshima
authors: E
authors: E
authors: Ueno
authors: I
authors: I
authors: Saito
authors: H
authors: H
authors: Matsumoto
mesh_terms: D001628:Beverages / Q000032:analysis*; D002138:Calibration; D002852:Chromatography, Ion Exchange; D007202:Indicators and Reagents; D019810:Sodium Azide / Q000032:analysis* / Q000302:isolation & purification; D012996:Solutions
chemical_list: D007202:Indicators and Reagents; D012996:Solutions; D019810:Sodium Azide