31 research outputs found
Methodology and applications of elemental mapping by laser induced breakdown spectroscopy
In the last few years, LIBS has become an established technique for the assessment of elemental concentrations in various sample types. However, for many applications knowledge about the overall elemental composition is not sufficient. In addition, detailed information about the elemental distribution within a heterogeneous sample is needed. LIBS has become of great interest in elemental imaging studies, since this technique allows to associate the obtained elemental composition information with the spatial coordinates of the investigated sample. The possibility of simultaneous multi-elemental analysis of major, minor, and trace constituents in almost all types of solid materials with no or negligible sample preparation combined with a high speed of analysis are benefits which make LIBS especially attractive when compared to other elemental imaging techniques. The first part of this review is aimed at providing information about the instrumental requirements necessary for successful LIBS imaging measurements and points out and discusses state-of-the-art LIBS instrumentation and upcoming developments. The second part is dedicated to data processing and evaluation of LIBS imaging data. This chapter is focused on different approaches of multivariate data evaluation and chemometrics which can be used e.g. for classification but also for the quantification of obtained LIBS imaging data. In the final part, current literature of different LIBS imaging applications ranging from bioimaging, geoscientific and cultural heritage studies to the field of materials science is summarized and reviewed. 2020 The Authors. Published by Elsevier B.V
Quantitative LA-ICP-MS imaging of platinum in chemotherapy treated human malignant pleural mesothelioma samples using printed patterns as standard
Experimental characterization of the human non-sequence-specific nucleic acid interactome
Polyprotic Acids
Knowledge of chemical properties of elements and ionizationComponente Curricular::Educação Superior::Ciências Exatas e da Terra::QuímicaThe program allows the calculations on the acid's dissociated ions distribution. The user can set the pKa values of the protonated species and immediately see the ion distribution for the pH valu
Overlapping Chromatographic Peaks
Knowledge in organic chemistryThis program simulates the measurement error when dealing with peaks of unequal height Chromatographic. You can try the program with different peak positions, heights and widths of peaksComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic
Molecular Formulas
knowledge in organic chemistryThe program Molecular Formulas allows calculate all possible molecular formulas of a given mass. The user can define the mass weightComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic
Console of a Mass Spectrometer
This program simulates the console of a mass spectrometer. The user can experiment with different mass ranges and resolutions of the compound 6-methyl-5-nonen-4-oneknowledge in organic chemistryComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic
Atomic spectra
Componente Curricular::Educação Superior::Ciências Exatas e da Terra::QuímicaThis program displays the atomic spectra of several chemical elements. In order to select another element please click the drop down box ”element” at left you may magnify the spectrum and pan the magnified spectrum by draging the mouse along the wavelength axis. Try to switch between emission and absorption spectraknowledge in inorganic chemistr
Polyprotic Acids
The program allows the calculations on the acid's dissociated ions distribution. The user can set the pKa values of the protonated species and immediately see the ion distribution for the pH valueKnowledge of chemical properties of elements and ionizationComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic