荧光分析法测定土壤中的微量铅  

Determination of Trace Lead in Soil by Fluorescence Analysis

作　　者：刘一蓓 Liu Yibei(Shenzhen Guoheng Testing Co.,Ltd.,Guangdong Shenzhen 518133)

机构地区：[1]深圳市国恒检测有限公司,广东深圳518133

出　　处：《云南化工》2020年第7期69-71,共3页Yunnan Chemical Technology

摘　　要：在浓盐酸(HCl)介质中Pb^2+离子会与Cl^-离子发生反应生成PbCl4^2-配合物,并且在紫外光线的照射下发出蓝色荧光,借助这一原理就可以检测出土壤中的Pb。荧光分析法下的HCl(浓)与Pb存在线性关系,使用范围为0.03~2.00μg/m L,检测极限为9.1×10^-3μg/m L。加入定量的标准物质后,依据样品的处理步骤分析,得出结果与理论的比值为96.2%~103.4%。荧光分析法具有便捷、快速、准确等的优势,适用于土壤中微量铅的测定。Due to its unique chemical properties,Pb^2+ will react with Cl^-to form PbCl4^2- in concentrated hydrochloric acid(HCl) medium,and it will emit blue fluorescence under the irradiation of ultraviolet light.This principle can be used to detect soil Pb content.However,there is a linear relationship between concentrated hydrochloric acid and lead under fluorescence analysis.The use range is 0.03 to 2.00 μg/m L,the detection limit is 9.1×10^-3 μg/m L,and the recovery rate is 96.2 to 103.4%.The result is that the fluorescence analysis method has the advantages of convenience,rapidness and accuracy,and is suitable for the determination of trace lead in soil.

关 键 词：荧光分析法 土壤 微量 铅 

分 类 号：TQ427.26[化学工程]