PMBP—泡塑萃取行为研究及其应用—岩石、水系沉积物中15个痕量稀土化学光谱法定量测定

Application of PMBP-Polyfoam Extraction for the Determi-nation of 15 Trace REE in Rocks and Sediments by Spectrography

近些年来,国内外在痕量稀土的测定上取得重要进展。但均采用了先进的近代仪器,如1CP-光量计,中子活化,火花质谱,X-荧光光谱等。本法采用PMBP—泡塑萃取富集,以国产一米光栅摄谱仪测定15个痕量稀土,检出限0.6—300ppb,多次测定精密度(RSD)除铽±18.2%外,其余在±4.7—±13.9%之间。

A chemical spectrographic method for the determination of 15 trace REE in rocks and sediments was established. PMBP-polyfoam was used to extract trace REE from weter solution at pH 2.5. After ashing and ignition the residue was subjected to deterrmination on a WPG-100 grating spectrograph. The detection limit is 0.6-300 ppb. The method has been applied to sediment standards GSD1-GSD8 and the obtained REE results agreed well with the recommended values with RSD 4.7-13.9%(18.2% for Pr).