Showing papers in "Spectrochimica Acta Part B: Atomic Spectroscopy in 2003"

TL;DR: Balmer-alpha, -beta and -gamma lines have been calculated using computer simulations including ion dynamics effects for equilibrium and non-equilibrium conditions as discussed by the authors, and the results obtained allow us to supply diagnostic maps based on the widths of those lines, as well as the Stark broadened full line profiles and the dipolar correlation functions obtained in the simulations.

TL;DR: In this paper, the effect of the laser fluence on the target heating, melting and vaporization, and on the plume characteristics and plasma formation is studied, as well as the resulting plasma shielding of 0 q 2q the incoming laser beam.

TL;DR: An overview is given of chemometrics as it can be applied to spectroscopic and other multivariate data, with a focus on soft modeling for situations that are too complicated for the traditional hard models to work.

TL;DR: In this paper, the rotational temperature of an atmospheric plasmas was measured by analyzing three different molecular spectra, i.e., OH, O and N, emitted from the atmospheric plasma in ambient air.

TL;DR: An overview of the analytical procedures documented in this particular field of analytical chemistry with a distinctive emphasis on spectrochemical methodology, it being the most sensitive and robust for accomplishing the above analytical task is given in this article.

TL;DR: In this paper, the potential impact of a coal combustion power plant in the northern part of Vietnam with regard to elemental pollution on the surrounding environment was investigated using total-reflection X-ray fluorescence and atomic absorption spectroscopy.

TL;DR: In this article, an improved lithium metaborate fusion technique for inductively coupled plasma mass spectrometric analysis of felsic rocks is proposed, which involves the dissolution of fused sample material with HF followed by treatment with HNO3.

TL;DR: An on-line cadmium preconcentration and determination system implemented with inductively coupled plasma optical emission spectrometry associated to flow injection was studied in this article, which was successfully applied to the determination of total Cadmium in drinking water samples.

TL;DR: In this article, the particle size distribution of laser ablation aerosols are a function of the wavelength, the energy density and the pulse duration of the laser, as well as the sample matrix and the gas environment.

TL;DR: A review of the state of the art and the progress of different inorganic mass spectrometric techniques such as ICP-MS, laser ablation ICPMS vs. TIMS, glow discharge Mass Spectrometer (SVM).

TL;DR: In this paper, the authors used a two-region model of the plasma to generate theoretical COGs that describe satisfactorily the experimental curves of all the lines using a single set of plasma parameters.

TL;DR: In this paper, a matrix separation procedure based on algae C. vulgaris covalently immobilized on silica gel in flow mode has been developed, which shows better reproducibility, improved efficiency of platinum retention on the column (93.3±1.6%), and less laborious and less time consuming.

TL;DR: In this paper, a sensitive and selective method has been developed for the speciation of Cr(III) and Cr(VI) in natural water using a nanometer titanium dioxide micro-column (20 mm×3.0 mm i.d.).

TL;DR: In this article, the authors found that Roman and post-Empire glasses found in Europe are reputed to have a very constant composition and hence source of components, but some 4-5th century and later specimens show evidence of a different source of silica (sand) component.

TL;DR: In this article, the effect of three-body recombination on atomic titanium temporal distribution has been explained, as determined by Stark effect, for the estimation of the three body recombination rate constant, and the quasi-equilibrium state of the laser-induced plasma has been established on the basis of the failure of Saha balance equation.

TL;DR: The formation of a laser-induced plasma in a cavity and the effects of a cavity on the ablation process were investigated in this article, where the same authors used the laser-induced plasmas in the cavity and on a flat surface.

TL;DR: In this paper, a direct injection high efficiency nebulizer (DIHEN)-inductively coupled plasma mass spectrometry (ICPMS) is investigated for analysis of petroleum samples dissolved in volatile organic solvents.

TL;DR: An overview of the application of lasers in nuclear physics can be found in this paper, where the authors focus on atomic physics techniques for extracting nuclear properties such as the nuclear spin, the magnetic dipole moment, the spectroscopic quadrupole moment and changes in charge radii.

TL;DR: In this article, the resonance ionization laser ion source (RILIS) can provide the chemical selectivity to separate beams with reduced isobaric contamination, which could further improve the efficiency, selectivity, rapidity of release and stability of the operation.

TL;DR: In this paper, a simple, fast, precise and accurate method to determine inorganic mercury and total mercury in biological and environmental samples was developed, where the optimized flow-injection mercury system permitted the separate determination of inorganic and total methylmercury using sodium borohydride as reducing agent.

TL;DR: In this paper, the capability of the small-sized dielectric barrier discharge as an element-selective diode laser atomic absorption detector for gas chromatography is investigated, and detection limits have been determined for halogenated and sulfured hydrocarbons in the low to the high pg/s-range dependent on the element measured.

TL;DR: In this article, a Q-switched Nd:YAG laser was focused on ceramic targets in an argon atmosphere at reduced pressure, and the emission spectra from laser-induced plasma were measured using time-resolved spectroscopy.

TL;DR: In this paper, the retention behavior of arsenite, arsenate, monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), arsenobetaine (AsB), arsenocholine (AsC), trimethylarsine oxide (TMAO), and tetramethylarsonium ion (tMAI) on various silica-based solid phase extraction (SPE) cartridges was examined.

TL;DR: In this paper, the emission of laser produced silicon and aluminum plasmas is investigated in the energy range from 0.1 to 100 μJ (0.5-500 J/cm 2 ) using 10 ns and 50 ps KrF laser pulses focused to a 5 μm diameter spot.

TL;DR: In this paper, the identification of inorganic pigments with X-ray diffraction analysis in combination with XRF was carried out in order to facilitate the analysis of the diffractograms and to point out differences in the elemental composition of different pigments.

TL;DR: In this article, a modified compact 2.45 GHz microstrip plasma (MSP) operated with Ar as working gas at atmospheric pressure has been characterized and examined for its suitability for the determination of Hg as gaseous species by optical emission spectrometry.

TL;DR: In this paper, the authors used a spectral library to identify alloys used in the manufacture of jewelry pieces with the help of spectral library and a rank correlation method for comparison between spectra, providing good correlation coefficients for alloys studied.

TL;DR: In this article, a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was applied to the determination of Cr, Cu, Zn, Cd and Pb in soil samples.

TL;DR: Iron, copper, zinc and selenium were determined directly in serum samples from healthy individuals and cancer patients by total reflection X-ray fluorescence spectrometry using the Compton peak as internal standard to demonstrate the potential of the total reflectionX-rayfluorescence spectrochim/artificial neural network approach in clinical chemistry.