X射线荧光光谱法测定化探样品中的主次痕量元素

Determination of Major,Minor and Trace Elements in Geochemical Samples by X-Ray Fluorescence Spectrometric

采用低压聚乙烯镶边垫底的粉末样品压片制样,用ZSX prim usⅡX射线荧光光谱仪测定化探样品中C、N、N a、M g、A 1、S i、P、S、C 1、K、C a、Sc、T i、V、C r、M n、F e、Co、N i、Cu、Zn、G a、A s、B r、R b、Sr、Y、Z r、N b、M o、Sn、B a、L a、C e、H f、U、Th、Pb和N d,共39个组分,C、N的分析采用RX 45、RX 61专用分析晶体。使用经验系数法和康普顿散射线作内标校正基体效应,经标准物质检验的分析结果与标样值吻合。用GBW 07308国家一级标准物质作精密度试验的统计结果,除U的RSD(n=12)为23.8%,C l、Sc、M o、Sn的RSD<13.0%以外,其余各组分均小于6.0%。

A method for the determination of C,N,Na,Mg,A1,Si,P,S,C1,K,Ca,Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,Ga,As,Br,Rb,Sr,Y,Zr,Nb,Mo,Sn,Ba,La,Ce,Hf,U,Th,Pb and Nd in geochemical exploration samples by X-ray fluorescence spectrometry with pressed powder pellet sample preparation was developed.Ultra collimator and special analysis crystals(such as RX45 and RX61) are used for C and N,Compton scattering line as the internal standard and empirical coefficients were used for the correction of matrix effect.Three Chinese national reference materials GBW 07401,GBW07428 and GBW07318 were selected for the verification of the accuracy of the method and the analytica1 results wel1 agreed with the certificate values.A Chinese nationa1 primary reference materia1 GBW 07308 with low elements contents was selected for precision test.Statistica1 results showed that RSD(n=12) were better than 6.0% for major elements and others,except for U=23.8%and for Cl,Sc,Mo,Sn<13.0%.