容量法测定肥料中氮含量不确定度的分析

Analysis of the Uncertainty of the Content of Nitrogen in Fertilizer with Capacity Method

通过对蒸馏—滴定法测定肥料中氮含量的不确定度的系统分析,阐述了测量结果不确定度的主要来源,并对其分量进行了量化计算,最后计算出合成标准不确定度和扩展不确定度。通过评估,得出影响容量法氮含量测定不确定度的主要因素是温度变化引起的体积变化。

The main reasons of the uncertainty of the result for the content of nitrogen in fertilizer with distillation - titration by systemic analysis were introduced in this paper, the accurate calculation of the standard uncertainty and zxpanded uncertainty were carried out. In a word the affect on the uncertainty of the content of nitrogcn with capacity method was the volume change with the temperature change.