title: [Determination of ammonia and potassium in tobacco by ion chromatography].
abstract: A new ion chromatographic method was developed for the quantitative determination of ammonia and potassium in tobacco. The tobacco samples were treated with dilute nitric acid and K+, NH4+ were extracted. The method is fast and convenient. The relationships between peak heights and initial concentrations of K+ and NH4+ were linear. The detection limits were 0.05 mg/L for K+ and 0.03 mg/L for NH4+. Recoveries of K+ and NH4+ were 96.7%-106.7% and 96.5%-109.1% respectively. The whole procedure of determination can be completed within 5 min.
authors.affiliation: Department of Food Science, University of Science and Technology of China, Hefei 230052, China. xbllml@china.com
authors.forename: B L
authors.initials: BL
authors.lastname: Xia
authors.forename: Y X
authors.initials: YX
authors.lastname: Zheng
authors.forename: L
authors.initials: L
authors.lastname: Shi
authors.forename: Q L
authors.initials: QL
authors.lastname: Liu
mesh_terms: D000641:Ammonia / Q000032:analysis*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D011188:Potassium / Q000032:analysis; D014026:Nicotiana / Q000737:chemistry*
chemical_list: D000641:Ammonia; D011188:Potassium