微波消解-连续流动火焰光度法测定烤烟中的钾含量

Determination of Potassium in Flue-cured Tobacco by Microwave Digestion-Continuous Flow Flame Photometry Method

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.

Abstract: Tobacco samples are digested by a HNO_{3_{-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.}}