摘要
用HNO3-H2O2体系于微波消解仪中密闭消解烟草样品,以连续流动火焰光度法快速测定烤烟中的钾含量,方法回收率在99.47%～100.08%之间,相对标准偏差小于2%,与标准值的相对误差为1.19%.并与硫酸常压消化方式相比,操作步骤少,速度快,精密度和准确度高.
Tobacco samples are digested by a HNO3-H2O2 system in a closed microwave digestion instrument,and are then determined by the continuous flow analysis.A method of quantitative analysis of potassium in flue-cured tobacco has been established.The results showed that the recoveries were between 99.47%～100.08% and the relative standard deviations were lower than 2%.The results were in agreement with certified values with a relative error of 1.19%.As compared with the sulfuric acid atmosphereric pressure digestion method,this method can determine the contents of potassium in flue-cured tobacco accurately and rapidly.
出处
《分析测试技术与仪器》
CAS
2010年第2期120-122,共3页
Analysis and Testing Technology and Instruments
关键词
微波消解
连续流动分析
烤烟
火焰光度计
钾
microwave digestion
continuous flow method
flue-cured tobacco
flame photometer
potassium
