Flow‐injection in‐valve solid‐phase extraction spectrophotometric determination of uranium in geological samples

Abstract

Flow-injection analysis (FIA) system incorporating in-valve solid-phase extraction microcolumn for on-line separation and preconcentration using a new resin, U/TEVA.Spec™, has been proposed for the spectrophotometric determination of uranium in geological samples using 4-(2-pyridylazo) resorcinol (PAR) as a color agent. Optimization of the condition involved in the system was investigated. Possibility of a single standard calibration is discussed. © 1998 John Wiley & Sons, Inc. Lab Robotics and Automation 10: 25–31, 1998