校准曲线的不同配制方式对测定土壤全硼适用性研究  

Research on the applicability of different preparation methods of calibration curves for the determination of total boron in soil

作　　者：苏晓红 樊新颖 SU Xiao-Hong;FAN Xin-Ying(Test Center of Geophysical Exploration Academy of China Metallurgical Geology Bureau,Baoding 071000,China)

机构地区：[1]中国冶金地质总局地球物理勘查院测试中心,保定071000

出　　处：《实验室检测》2024年第11期39-41,共3页Laboratory Testing

摘　　要：目的建立碱熔–电感耦合等离子体发射光谱法测定土壤全硼的方法,以满足第三次全国土壤普查的质控要求。方法本试验采用碱熔法对样品进行前处理,通过优化实验条件,筛选最优曲线配制方法,利用电感耦合等离子体发射光谱法对三种不同含量的标准物质进行测定。结果用实验用水配制的校准曲线线性方程和相关系数为y=1171.470x+12.981(r^(2)=1.000),采用国家标准物质进行正确度检验,相对误差为13%~33%;用基体匹配液配制曲线线性方程和相关系数为y=818.529x+10.124(r^(2)=0.999),采用国家标准物质进行正确度检验,相对误差为1.9%~7.7%。结论用基体匹配液配制校准曲线可以消除碱熔造成的基体干扰作用,获得较为满意的结果。Objective To establish a method for the determination of total boron in soil by alkali fusion-inductively coupled plasma emission spectrometry to meet the quality control requirements of the third national soil census.Methods In this experiment,the alkali fusion method was used for sample pretreatment.By optimizing experimental conditions and screening the optimal curve preparation method,three standard substances with different contents were determined by inductively coupled plasma atomic emission spectrometry.Results The linear equation and correlation coefficient of the calibration curve prepared with experimental water are y=1171.470x+12.981(r^(2)=1.000).The accuracy test was carried out with national standard substances,and the relative error is 13%~33%.The linear equation and correlation coefficient of the curve prepared with matrix matching solution are y=818.529x+10.124(r^(2)=0.999).The accuracy test was carried out with national standard substances,and the relative error is 1.9%~7.7%.Conclusion This shows that preparing the calibration curve with matrix matching solution can eliminate the matrix interference caused by alkali fusion and obtain satisfactory results.

关 键 词：碱熔 基体匹配液 硼 校准曲线 

分 类 号：S151.9[农业科学—土壤学]