测定水中动植物油含量的不确定度简化评定

对红外分光光度法测定水中动植物油的不确定度来源进行了分析,构造出合理的数学模型,确定了各输入量之间的关系,量化各分量后,合成得到满意的结果。从而提出,根据被测量及其所依赖的输入量之间的关系构造数学模型,并运用不同的评定方法对各个分量进行量化,可实现对某些检测项目不确定度的简化评定。

The source of the uncertainty of the determination of animal and vegetable oils in water with infrared spectrometry was analyzed and rational mathematical model was formulated as well. Then, correlation of inputs was determined and satisfactory results were obtained after each portion was quantified. The results showed that mathematical model was formulated according to the correlation between the measured portion and input portion. Each portion could be quantified by using different evaluation methods. In this way, the evaluation of uncertainty in certain test items could be achieved.