氧弹燃烧-离子色谱法测定固体生物质燃料中氯含量不确定度评估

Determination of Chlorine in Solid Biomass Fuel by Oxygen Bomb Combustion-Ion Chromatography Uncertainty Assessment

氧弹燃烧-离子色谱法虽然是常规的无机离子分析方法,但作为首次应用在固体生物质燃料氯含量检测领域的检测方法,其准确度需要经过科学验证确认,因此,开展该方法在该领域的不确定度评估是非常有必要的。通过建立数学模型,分析氧弹燃烧-离子色谱法测定过程中的不确定度各分量,并计算出个分量的相对标准不确定度,最后评估出该方法在所在实验室测定条件下的扩展不确定度。经评估,在置信率为95%的情况下,该方法的扩展不确定度为6.92%(k=2)。

Oxygen bomb combustion-ion chromatography is a conventional inorganic ion analysis method,but as the first detection method applied in the field of chlorine content detection of solid biomass fuels, its accuracy needs to be confirmed by scientific verification.Therefore,it is very necessary to evaluate the uncertainty of this method in this field.By analyzing the components of uncertainty in the determination process of oxygen bomb combustion-ion chromatography,a mathematical model was established,and the relative standard uncertainty of each component was calculated.Finally,the expanded uncertainty of this method under the laboratory conditions was evaluated.It is estimated that the expanded uncertainty of the method is 6.92 % with a confidence rate of 95 %.