电感耦合等离子体发射光谱法测定土壤中有效磷的不确定度评价  

Uncertainty Evaluation for Determination of Effective Phosphorus in Soil by Inductively Coupled Plasma Optical Emission Spectrometry

作　　者：韩梅[1] 韩文红 张伯研 贾娜[1] 张威[1] 孔祥科[1] HAN Mei;HAN Wen-hong;ZHANG Bo-yan;JIA Na;ZHANG Wei;KONG Xiang-ke(Institute of Hydrogeology&Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050001,China;The Sixth Geological Brigade of Hebei Geological&Mineral Exploration&Development Bureau,Shijiazhuang 050086,China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050001 [2]河北省地质矿产勘查开发局第六地质大队,石家庄050086

出　　处：《四川环境》2024年第3期162-166,共5页Sichuan Environment

摘　　要：为准确测定土壤中有效磷的含量,采用电感耦合等离子体光谱仪进行测定,并对测定过程中相关因素引起的不确定度进行评定。整个实验过程中不确定度来源主要包括以下5个方面:(1)样品称量时引入的不确定度u(m);(2)加入浸提液时浸提液体积V引入的不确定度u(V);(3)标准溶液配置时引入的不确定度u(C_(s));(4)标准曲线拟合引入的不确定度u(C0);(5)样品测量重复性引入的不确定度u(R)。结果表明,样品测量重复性、标准溶液配置、标准曲线拟合在整个实验中引入的不确定度影响较大。因此,在实际样品测定过程中,一定要注意对结果有影响的不确定度因素,加强质量控制,使结果准确可靠。In order to accurately determine the content of available phosphorus in soil,the inductively coupled plasma atomic emission spectroscopy(ICP-OES)was adopted for determination and the uncertainty caused by related factors in the determination process was evaluated.The sources of uncertainty during the whole experiment included the following five aspects:(1)uncertainty u(m)caused by sample weighing;(2)uncertainty u(V)caused by the volume of the extraction solution(V)when the extraction solution is added;(3)uncertainty u(C_s)caused by preparing the standard solution;(4)uncertainty u(C_0)caused by standard curve fitting;and(5)uncertainty u(R)caused by sample measurement repeatability.The results showed that the measurement repeatability,standard solution preparation and standard curve fitting had great influence on the uncertainty during the whole experiment.Therefore,in the actual sample determination process,we must pay attention to the uncertainty factors that have an impact on the results,and strengthen the quality control,to achieve accurate and reliable results.

关 键 词：电感耦合等离子体发射光谱法 土壤 有效磷 不确定度 

分 类 号：X830.2[环境科学与工程—环境工程]