现代农业科技Issue(11)：222-224,3.
石灰性土壤阳离子交换量测定的不确定度评定
Uncertainty Evaluation of Measurement Results for Determination of Cation Exchange Capacity in Calcareous Soils
摘要
Abstract
The cation exchange capacity(CEC)in calcareous soil samples was determined according to NY/T1121.5-2006.The results showed that the main factors that affected the determination results of CEC were as followsweighting of soil samples and reference materials,volume of volumetric flask,pipette and burette,measurement repeatability,etc.Based on this,the uncertainty of measurement was evaluated and synthetic uncertainty and expanded uncertainty were calculated.Finally,the solving methods to improve the accuracy of CEC analysis were put forward.In order to reduce the uncertainty produced by repeatability,it was necessary to increase the number of experiments.关键词
石灰性土壤/阳离子交换量/不确定度/评定Key words
calcareous soils/cation exchange capacity/uncertainty/evaluation分类
农业科技引用本文复制引用
杨虹..石灰性土壤阳离子交换量测定的不确定度评定[J].现代农业科技,2015,(11):222-224,3.
