摘要
采用稀硝酸浸提、离子色谱法 (IC)快速分析烟草中的钾及游离态氨。该法制样简便、测定快速 ,两种物质的标准曲线线性关系良好。方法的最低检测浓度 :K+,0 0 5mg/L ;NH3,0 0 3mg/L。回收率 :K+,92 7%～10 6 7% ;NH3,96 5 %～ 10 9 0 %。整个分析过程仅需 5min 。
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 +, NH 4 + were extracted The method is fast and convenient. The relationships between peak heights and initial concentrations of K + and NH 4 + were linear. The detection limits were 0 05 mg/L for K + and 0 03 mg/L for NH 4 + . Recoveries of K + and NH 4 + were 96 7% 106 7% and 96 5% 109 1% respectively. The whole procedure of determination can be completed within 5 min
出处
《色谱》
CAS
CSCD
北大核心
2001年第4期378-379,共2页
Chinese Journal of Chromatography
基金
国家烟草专卖局科研基金资助项目 ( 97 14 5 )
