Showing papers in "Spectrochimica Acta Part B: Atomic Spectroscopy in 2016"

TL;DR: In this paper, the authors highlight the work of many LIBS researchers who have developed, adapted, and improved upon sample preparation techniques for various specimen types in order to improve the quality of the analytical data that LIBS can produce in a large number of research domains.

TL;DR: In this paper, a review of sample preparation procedures applied for the mostly used techniques for metallic and metal oxide NPs characterization in consumer products and most outstanding publications of biological and environmental samples (from 2006 to 2015).

TL;DR: In this paper, the importance of dielectric barrier discharges for optical spectrometric detection in analytical chemistry has been discussed and a review of the application fields of such discharges is presented.

TL;DR: In this article, the authors provided high resolution mapping of uranium in sandstone-hosted uranium ores using laser-induced breakdown spectroscopy (LIBS) technique.

TL;DR: In this article, an external microwave power can significantly increase the signal lifetime from a few microseconds to hundreds of microseconds, resulting in a great enhancement on LIBS signals with the use of a long integration time.

TL;DR: In this paper, the authors employ laser ablation to investigate mechanisms for U optical signal variation under various environmental conditions during laser absorption spectroscopy (LAS) and optical emission spectrography (OES) and show that the U ground state population is significantly reduced in the presence of air ambient compared to nitrogen.

TL;DR: In this paper, a calibration procedure was introduced and the data achieved for accuracy, precision, reproducibility and the detection limits for major (Si, Al, Fe, Mn, Mg, Ca, Na, K, Ti, P) and trace (Ba, Cr, Cu, Hf, La, Nb, Ni, Pb, Rb, Sr, Ta, Th, U, Y, Zn, Zr) elements in the routine analysis of geological and environmental samples.

TL;DR: In this paper, a discussion on three different methods for the analysis of laser-Induced breakdown spectroscopy (LIBS) spectra, namely the One-Point-Calibration, the Calibration-Free Inverse method, and the Csigma graphs approach, is presented.

TL;DR: In this article, the use of cutting-edge beam-based techniques for nanoparticle in situ localization, quantification and speciation in a crop plant species (Lactuca sativa) is presented.

TL;DR: In this paper, the authors introduce the use of Nanoparticle Enhanced Laser Induced Breakdown (NELIBS) for the enhancement of molecular band emission in laser-induced plasmas and study the underlying mechanisms responsible for the observed enhancement.

TL;DR: In this article, a method for the measurement of Stark broadening parameters of atomic and ionic spectral lines based on laser ablation of hydrogen containing compounds was presented, where plume emission spectra, recorded with an echelle spectrometer coupled to a gated detector, were compared to the spectral radiance of a plasma in local thermal equilibrium.

TL;DR: In this paper, a method using wavelength dispersive X-ray fluorescence spectrometry (WDXRF) was developed to determine the content of 16 rare earth elements (REEs) and the concentration of the said elements in 169 samples of combustion ash of coals coming from ten Polish coal mines, as well as to validate the method.

TL;DR: In this article, the authors thank the financial support for this project from the Spanish National Research Program (Project ref. CGL2010-22168-C03-01 and Project ref.CGL2013-48802-C3-2-R).

TL;DR: In this article, the detection of uranium in a complex geological matrix under different measurement schemes is explored, and the results are compared to an in-situ LIBS system with medium resolving power and under ambient air conditions.

TL;DR: In this paper, the experimental and analytical methods that enrich and extract scientifically relevant information from X-ray computed tomography data are discussed along with how they enhance the tomographic dataset.

TL;DR: In this paper, five spectral decomposition algorithms were examined, with different known physical properties (e.g., isotopic splitting, hyperfine structure) of the spectral lines sequentially incorporated into the candidate algorithms as constraints.

TL;DR: In this article, the detection of CaF molecular emission bands is investigated to improve the analytical capabilities of atmospheric air LIBS for the determination of fluorine traces in solid samples, in particular, Cu matrix samples containing different fluorine concentration (between 50 and 600μg/g), and variable amounts of Ca, are used to demonstrate the linear relationships between CaF emission signal and F concentration.

TL;DR: In this article, a laser induced breakdown spectroscopy (LIBS) method was used for ash analysis in wheat flour and the results showed good linearity with the ash content between 0.48 and 1.39%.

TL;DR: In this article, a high voltage square-shaped electrical pulse initiated by laser ablation was investigated as a means to enhance the analytical capabilities of laser Induced breakdown spectroscopy (LIBS).

TL;DR: In this paper, the authors compared the accuracy of elemental predictions in models that use only spectral regions thought to contain peaks arising from the element of interest versus those that use information in the entire spectrum, and found that for the eight major elements, use of this technique results in a 35% improvement in prediction accuracy; for minors, the improvement is 13%.

TL;DR: In this article, micro X-ray fluorescence has been used to obtain elemental maps of bio-fortified wheat grains, providing useful insight into the posterior food processing mechanisms of this biofortified staple food.

TL;DR: In this article, the effect of different parameters, such as measurement time, carrier position, sample volume and sample drying time, on the recovery rate and relative standard deviation of the quantified metal from aqueous solutions is investigated.

TL;DR: In this article, the authors highlight the necessity of outlier filtering prior the multivariate classification in Laser-Induced Breakdown Spectroscopy (LIBS) analyses and demonstrate that the variance in the data topology of training and testing data sets has a great impact on the consequent data classification.

TL;DR: In this article, a non-analytical reaction model was proposed for reaction of a single analyte with tetrahydridoborate (THB) and for conditions approaching those typically encountered in the synthesis of nanoparticles and macroprecipitates.

TL;DR: In this article, an experimental and computational study on laser-induced breakdown spectroscopy (LIBS) for both unconfined flat surface and confined cavity cases is presented, where an integrated LIBS system is employed to acquire the shockwave and plasma plume images.

TL;DR: In this article, LiBS and ICP-MS spectra were used to detect minor metallic elements along with Na and Cl, while LA-ICP-MS was used to measure non-metallic and trace heavy metal elements.

TL;DR: In this article, the authors investigated the effect of interferences on Sr isotopic analyses in biological apatite and carbonate matrices using laser ablation multicollector inductively coupled plasma mass spectrometry (LA-MC ICP-MS).

TL;DR: In this paper, a liquid cathode glow discharge-atomic emission spectrometry was developed for the direct determination of Cu in aqueous solutions, in which the glow discharge plasma was produced in the solution between the needle-like Pt cathode and the electrolyte around it.

TL;DR: In this article, laser induced breakdown spectroscopy (LIBS) was used for elemental characterization of outcrop samples from the Marcellus Shale, and the results showed that the LIBS method can provide a rapid analysis of shale samples and can potentially benefit depleted gas shale carbon storage research.

TL;DR: LIBS and multivariate analysis may be a novel approach for detecting EOC and the results suggest that it is possible to distinguish blood plasma samples obtained from serially bled tumor-bearing TgMISIIR-TAg transgenic and wild type cancer-free littermate control mice.