Analytical Sciences

Abstract − Analytical Sciences, 19(3), 451 (2003).

Highly Resolved Luminescence Measurements for Traces of 1,3-Dibetanato Europium(III) and Terbium(III) Complexes Using a Microscope Laser Raman Spectrometer toward the Forensic Discrimination
Shoji KURATA*  and Masatoshi NAGAI**
*Criminal Investigation Laboratory, Metropolitan Police Department, Kasumigaseki, Chiyoda, Tokyo 100-8929, Japan
**Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Nakamachi, Koganei, Tokyo 184-8588, Japan
The emission spectra of luminescent trivalent europium (Eu3+) and terbium (Tb3+) complexes were measured using a microscope laser Raman spectrometer with a doubled Nd:YAG laser (532 nm) and an Ar laser (488 nm). Excitation at 532 and 488 nm corresponded to wavelengths of the 7F15D1 band of Eu3+ and the 7F65D4 band of Tb3+, respectively. The Eu3+ and Tb3+ complexes were discriminated by high-resolution emission spectra more distinctly and sensitively than by fluorescence spectrometry, the usual analytical method.