有机肥中磷含量的不确定度评定
Uncertainty Assessment of Phosphorus Content in Organic Fertilizers
白碧佳1
作者信息
- 1. 山西省应用化学研究所 山西省化肥农药产品质量监督检验站,山西 太原 030027
- 折叠
摘要
采用钒钼酸铵分光光度法进行有机肥中磷含量的测定,并对有机肥中磷含量进行不确定度评定.根据NY/T 525-2012 标准分析了有机肥中磷含量的关键测试步骤是样品溶液制备、标准物质、试样重复性实验、仪器测定,对此分别进行不确定度评定,最终合成相对标准不确定度.结果表明,有机肥中磷含量测定结果为X=2.12%±0.031%,k=2.
Abstract
Using the ammonium metavanadate-molybdate spectrophotometric method to determine the phosphorus content in organic fertilizers,uncertainty evaluation was conducted for the phosphorus content in organic fertilizers.According to the NY/T 525-2012 standard,key test steps for analyzing phosphorus content in organic fertilizers include preparation of sample solutions,use of standard substances,replicate experiments on samples,and instrument measurement.Uncertainty evaluations were performed separately for these steps,and the combined relative standard uncertainty was determined.The results show that the phosphorus content in organic fertilizers is X=(2.12±0.031)%with a coverage factor k=2.
关键词
有机肥/分光光度法/不确定度Key words
organic fertilizer/spectrophotometry/uncertainty引用本文复制引用
出版年
2024
NETL
NSTL
万方数据