系统聚类法及其在铅形态分析中的应用  

Application of Systematic Clustering to the Speciation Analysis of Lead

作　　者：马成有[1] 江东[1] 孙卓[1] 贾丹[2] 张笑然[1] 

机构地区：[1]吉林大学农学部公共教学中心,长春130062 [2]吉林大学第一医院,长春130062

出　　处：《理化检验（化学分册）》2010年第5期567-570,577,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：吉林省科技厅项目(20080115);吉林大学农学部青年基金课题

摘　　要：针对常规化学形态分析方法对浸取剂高选择性要求及严重串相问题等缺点,在浸取常数稳定的前提下,以常规化学形态分析方法为基础,确定了建立标准样本的方法,将系统聚类法用于模拟地质样品中各形态铅的同时测定。克服了串相问题及降低了对浸取剂高选择性的要求,用此法对模拟样品进行了分析,相对误差小于±11%,结果优于常规化学形态分析方法。Drawbacks of requiring highly selective extractants and difficulties of phase-crossing in phase separation were encountered in the conventional chemical speciation analysis.Aiming to the solution of the problems,the systematic clustering method was applied to the simultaneous determination of lead of various species in simulated geological samples,and on the base of the conventional speciation analysis with stable extraction constants,a set of standard samples with various compositional ratios of lead species were established,and analyzed by the prescribed method.As shown by the analytical results,the relative errors obtained were all less than ±11%,and better accuracy was achived by applying the systematic clustering as compared with the conventional chemical speciation analysis.The drawbacks mentioned above were overcome.

关 键 词：系统聚类 形态分析 铅 地质样品 

分 类 号：O656[理学—分析化学]