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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 |
投稿时间:2010-03-31 修订日期:2010-04-27 |
DOI: |
中文关键词: 微波消解,连续流动分析,烤烟,火焰光度计,钾 |
英文关键词:microwave digestion,continuous flow method,flue-cured tobacco,flame photometer,potassium |
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中文摘要: |
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. |
英文摘要: |
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. |
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