Showing papers in "Spectrochimica Acta Part B: Atomic Spectroscopy in 2022"

TL;DR: In this article , a suite of 1198 laboratory spectra of 334 well-characterized reference samples was used to determine quantitative elemental compositions of diverse geologic materials at Jezero crater, Mars.

TL;DR: Li et al. as mentioned in this paper used laser-induced breakdown spectroscopy (LIBS) for fast measurement of caking index (G) and maximum thickness of plastic layer (Y) of coal.

TL;DR: Laser-induced breakdown spectroscopy (LIBS) is a versatile elemental analytical technique whose basic elements were described as early as 1962, shortly after the invention of a pulsed laser as discussed by the authors .

TL;DR: In this article , semi-supervised learning was applied to overcome physical matrix effects in large crystals, which effectively decreased the number of unknowns due to the large amount of existing minerals and lithologies.

TL;DR: In this article , a novel preconcentration method was developed for As, Sb and Bi following trapping of their volatile hydride derivatives onto cellulose-based platforms modified with Ag nanoparticles for ultrasensitive determination by inductively-coupled plasma mass spectrometry (ICP-MS).

TL;DR: Absorption spectroscopy hyphenations of the laser-induced plasma have been attempted by a handful of groups since the early 1990s as mentioned in this paper , though the details of the experiment remain somewhat opaque.

TL;DR: In this paper , a new sample introduction method of nebulized film dielectric barrier discharge (NFDBD) assisted chelate vapor generation coupled with inductively coupled plasma mass spectrometry (ICP-MS) for trace rare earth elements (REEs) determination in environmental water was developed.

TL;DR: In this paper , an ultrasound assisted dispersive magnetic micro-solid phase extraction (DM-μSPE) approach, along with electrothermal atomic absorption spectrometry (ETAAS) for the determination of lead at trace level in spring, well, river mineral and tap water samples was developed.

TL;DR: In this article , the authors presented a novel Resonant Laser Secondary Neutral Mass Spectrometry (rl-SNMS) system capable of multi-element measurements in short succession without any manual adjustment to the laser system.

TL;DR: In this article , an optimization of dual-column chromatography achieves high Li recovery, low procedural blank, and low Na/Li ratio (< 1) after purification, allowing the acquisition of high precision Li isotope ratios by a Nu Plasma 3 multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS).

TL;DR: The Perseverance rover is exploring Jezero crater on Mars since February 2021 as mentioned in this paper , and the SuperCam instrument is part of the scientific payload, combining five different techniques in order to characterize the targets to sample: LIBS (Laser-Induced Breakdown Spectroscopy), Raman and VISIR (VISIR) spectroscopies, Sound Recording and a colored Imager.

TL;DR: In this article , an improved version of the original GFAAS method for blood Pb was presented, with an estimated detection limit (LOD) of ≈ 1 μg/dL.

TL;DR: In this paper , it was shown that the molecules of other rare earth elements (Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Y, and Lu) with oxygen appear effective for analytical purposes.

TL;DR: In this paper , microwave energy was applied to the laser-induced breakdown spectroscopy (LIBS) of laser-ablated Al plasma using a helical antenna and the process of generating an enhanced laser ablation plasma was visualized with a high-speed camera.

TL;DR: Li et al. as mentioned in this paper investigated the performance of a designed deep convolutional neural network (CNN) on datasets consisting of multi-distance spectra and showed that CNN is an extraordinary chemometrics for material classification on multi-dimensional spectra datasets, implying that CNN-LIBS is a promising methodology for geochemical sample identification/classification.

TL;DR: In this paper , a collinear dual-pulse LIBS system based on two nanosecond lasers with a total energy of 30 mJ is developed to detect the chlorine in cement.

TL;DR: In this paper , a data treatment protocol is proposed to achieve reliable and accurate Cl determination from the CaCl molecular spectral signal, not requiring the use of more complex numerical approaches, and the suitability of the proposed methodology for Cl determination is successfully applied in industrial gypsum waste samples, where the results obtained by LIBS are validated using high resolution molecular absorption spectroscopy (HR-CS-MAS) and potentiometric titration.

TL;DR: In this paper , a method for mercury speciation using magnetic nanoparticles (MNPs) coated with dithiol and detection by cold vapor atomic fluorescence spectrometry (CV AFS) was developed.

TL;DR: In this paper , the trace carbon composition in ultra-low carbon steel is measured by laser-induced breakdown spectroscopy (LIBS) and five standard steel samples, with C content between 9 and 89 μg/g, are used to study the performance of LIBS quantitative analysis.

TL;DR: In this article , the authors investigated the influences of plasma condition, concentration effect, ablation position and on-line addition of an aqueous Ni standard for non-matrix-matched Fe isotopic analysis by femtosecond laser ablation multi-collector inductively coupled plasma mass spectrometry (fs LA-MC-ICP-MS).

TL;DR: In this article , the authors evaluated the relationship between the measured plasma parameters and the signal-to-noise ratio (SNR) of an atomic line change with different values of delay time and gate width.

TL;DR: In this paper , an extensive collisional radiative model for the neutral argon and singly ionized argon plasma is developed to estimate the key properties of the high-ionization-rate equilibrium plasma plume.

TL;DR: In this article , a new regression method based on dominant factor and kernel extreme learning machine is proposed, which uses knowledge-based spectral lines, related to analyte compositions, to construct a linear physical principle based model and adopts K-ELM to account for the residuals of the linear model.

TL;DR: In this article , the authors provide a template for calculating quantification limits based on multivariate LIBS regression models, and understand how this value is affected by several external factors: instrumentation (Mount Holyoke College ChemLIBS vs. Los Alamos National Laboratory ChemCam flight model), outlier removal method (highest natural concentration vs. statistically-based method), and acquisition atmosphere (Mars vs. air vs. vacuum), for two methods of calculating instrument sensitivity from experimental data (taken from metal spectra vs. noise-free regions of rock spectra).

TL;DR: In this paper , an analytical method based on dynamic reaction cell (DRC) technology using ammonium (NH3) as a reaction gas was developed for the determination of ultra-trace Ti, Zn, Cu and Ag by inductively coupled plasma mass spectrometry (ICP-MS).

TL;DR: In this article, the analytical potential of LIBS for the analysis of liquid solutions was evaluated using two experimental setups, one based on a TEA CO2 laser and the other in which Nd:YAG laser was used.

TL;DR: In this paper , the analytical potential of LIBS for the analysis of liquid solutions was evaluated using two experimental setups, one based on a TEA CO2 laser and the other in which Nd:YAG laser was used.

TL;DR: In this article , a system comprising laser ablation-tuneable diode laser absorption spectroscopy (LA-TDLAS) and LIBS is proposed to enable isotopic analysis of certain elements, including lithium and uranium.

TL;DR: In this paper , the use of deep spectral convolutional networks for the purpose of material classification and composition estimation is still limited, despite the great opportunities of these techniques, and the authors proposed a method comprising a denoising system combined with a method that extracts 145 features from the raw LIBS spectra.

TL;DR: In this paper , a comparative study of laser induced breakdown spectroscopy (LIBS) of brass and aluminium targets has been performed under different experimental configurations, conditions i.e. in the presence of magnetic field and laterally colliding plasmas in the absence as well as in the case of transverse magnetic field with an objective to improve the detection sensitivity of LIBS signal.