杜马斯燃烧法测定有机肥料中全氮含量的可行性研究
Feasibility Study on Determination of Total Nitrogen Content in Organic Fertilizer by Dumas Combustion Method
杨莹 1桂素萍 1汪美先 1李玉兰1
作者信息
- 1. 云南省化工产品质量监督检验站 云南昆明 650228
- 折叠
摘要
考察了杜马斯燃烧法和行业标准《有机肥料》(NY/T 525-2021)中的方法测定有机肥料中全氮含量的精密度和加标回收率.结果表明:NY/T 525-2021 中的方法测得 5 个有机肥料样品的全氮质量分数为1.76%～3.83%,加标回收率为 99.5%～101.0%;杜马斯燃烧法测得 5 个有机肥料样品的全氮质量分数为1.70%～3.84%,加标回收率为 98.1%～104.7%;两种方法的相对标准偏差为 0.18%～2.45%,均可满足有机肥料中全氮含量的测定要求.与NY/T 525-2021 中的方法相比,杜马斯燃烧法具有操作便捷安全、自动化程度高、测定耗时短等特点.
Abstract
The precision and recovery of the determination of total nitrogen content in organic fertilizers by Dumas combustion method and the method in industry standard"Organic Fertilizer"(NY/T 525-2021)are investigated.The results show that the total nitrogen mass fraction of the five organic fertilizer samples measured by the method in NY/T 525-2021 is 1.76%to 3.83%,and the recovery is 99.5%to 101.0%.The mass fraction of total nitrogen in five organic fertilizer samples measured by Dumas combustion method is 1.70%to 3.84%,and the recovery is 98.1%to 104.7%.The relative standard deviation of the two methods is 0.18%to 2.45%,both of which can meet the requirements of the determination of total nitrogen content in organic fertilizer.Compared with the method in NY/T 525-2021,Dumas combustion method has the characteristics of convenient and safe operation,high degree of automation and short measurement time.
关键词
有机肥料/杜马斯燃烧法/全氮含量/加标回收率Key words
organic fertilizer/Dumas combustion method/total nitrogen content/recovery引用本文复制引用
出版年
2024
NETL
NSTL
万方数据