Abstract
In order to examine the applicability of a chip-based analytical system equipped with the thermal lens microscope (TLM) to the determination of concentrations of U(VI) and H in various solutions in spent nuclear fuel reprocessing processes, we have measured the thermal lens (TL) signal intensities of U(VI) and 4'-dimethylaminoazobenzene-4-sulfonate (methyl orange) solutions with various concentrations in microchannel. From such measurements, we found that the U(VI) species more than 10 mol/dm (M) can be determined quantitatively using the TLM and that the measurements of U(VI) concentrations > 10 M become possible by using coloring reagent. Furthermore, we found that the pH or H concentrations in aqueous solutions in microchannel can be also analyzed by TLM, even in the presence of metal ions. Copyright © 2005 by the Transducer Research Foundation, Inc.