TY - JOUR A1 - Höhse, Marek A1 - Mory, D. A1 - Florek, S. A1 - Weritz, Friederike A1 - Gornushkin, Igor B. A1 - Panne, Ulrich T1 - A combined laser-induced breakdown and Raman spectroscopy Echelle system for elemental and molecular microanalysis JF - Spectrochimica acta B N2 - Raman and laser-induced breakdown spectroscopy is integrated into a single system for molecular and elemental microanalyses. Both analyses are performed on the same ~ 0.002 mm² sample spot allowing the assessment of sample heterogeneity on a micrometric scale through mapping and scanning. The core of the spectrometer system is a novel high resolution dual arm Echelle spectrograph utilized for both techniques. In contrast to scanning Raman spectroscopy systems, the Echelle-Raman spectrograph provides a high resolution spectrum in a broad spectral range of 200-6000 cm- 1 without moving the dispersive element. The system displays comparable or better sensitivity and spectral resolution in comparison to a state-of-the-art scanning Raman microscope and allows short analysis times for both Raman and laser induced breakdown spectroscopy. The laser-induced breakdown spectroscopy performance of the system is characterized by ppm detection limits, high spectral resolving power (15,000), and broad spectral range (290-945 nm). The capability of the system is demonstrated with the mapping of heterogeneous mineral samples and layer by layer analysis of pigments revealing the advantages of combining the techniques in a single unified set-up. KW - LIBS KW - Raman KW - Echelle KW - Laser-induced breakdown spectroscopy KW - Hyphenated technique PY - 2009 DO - https://doi.org/10.1016/j.sab.2009.09.004 SN - 0584-8547 SN - 0038-6987 VL - 64 IS - 11-12 SP - 1219 EP - 1227 PB - Elsevier CY - Amsterdam AN - OPUS4-20493 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Gornushkin, Igor B. A1 - Panne, Ulrich A1 - Winefordner, J. D. T1 - Linear correlation for identification of materials by laser induced breakdown spectroscopy: Improvement via spectral filtering and masking JF - Spectrochimica acta B N2 - The purpose of this work is to improve the performance of a linear correlation method used for material identification in laser induced breakdown spectroscopy. The improved correlation procedure is proposed based on the selection and use of only essential spectral information and ignoring empty spectral fragments. The method is tested on glass samples of forensic interest. The 100% identification capability of the new method is demonstrated in contrast to the traditional approach where the identification rate falls below 100% for many samples. KW - Correlation analysis KW - Linear correlation KW - Material identification KW - Laser induced plasma KW - LIBS PY - 2009 DO - https://doi.org/10.1016/j.sab.2009.07.038 SN - 0584-8547 SN - 0038-6987 VL - 64 IS - 10 SP - 1040 EP - 1047 PB - Elsevier CY - Amsterdam AN - OPUS4-20621 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -