Showing papers in "Spectrochimica Acta Part B: Atomic Spectroscopy in 1999"

TL;DR: In this paper, a review of the use of laser ablation and arc and spark ablation for ICP-MS detection is presented, with particular emphasis on micro-sampling of geological materials.

TL;DR: In this paper, the electron number density and temperature during the early phase of laser-induced plasmas from silicon using a 266-nm, 3-ns Nd:YAG laser were deduced via spectroscopic methods.

TL;DR: In this paper, the effect of acid on the different stages taking place during the whole analytical process has been reviewed and the results summarized here reveal the crucial role that acids play in atomic spectrometry, being one of the most important sources of interferences suffered by these techniques.

TL;DR: The use of surfactant-based organized assemblies in analytical atomic spectroscopy is extensively and critically reviewed along three main lines: first, the ability of organised media to enhance detection of atomic Spectroscopic methods by favourable manipulation of physical and chemical properties of the sample solution; second, the extension of separation mechanisms by resorting to organized media and third a discussion of synergistic combinations of liquid chromatography separations and atomic detectors via the use of vesicular mobile phases as discussed by the authors.

TL;DR: Grazing incidence X-ray spectrometers are now widely used for surface and thin film analysis as discussed by the authors, and the recent advancement since 1993 of the grazing incidence X ray spectrometry and reflectometry in both theoretical and experimental aspects is described in detail through the introduction of numerous published works on the application in various fields of the science and industrial technologies.

TL;DR: In this paper, the curve-of-growth (COG) method was applied to a laser-induced plasma, which was produced by a Nd:YAG laser on the surface of steel samples containing 0.007-1.3% of Cr atoms.

TL;DR: In this paper, the spectral profiles of Ca and Rb lines have been studied in a laser induced plasma as a function of pressure (1-10 torr) and delay time with respect to the plasma initiation (1−10 μs).

TL;DR: In this paper, the ETV-ID-ICP-MS method has been applied to the determination of Cd, Hg and Pb in seawater samples and seawater collected from Kaohsiung area.

TL;DR: In this paper, a review of recent progress in the development of electrospray mass spectrometry (ESMS) as a tool for elemental speciation is reviewed, including application, quantitation, sensitivity, limitations and future directions.

TL;DR: In this article, the laser ablation behavior of a suite of 10 Cu-Zn binary alloys was studied using inductively coupled plasma mass spectrometry, and linear calibration curves were obtained when Zn signal intensity was normalized to signal intensity of Cu or to crater volume.

TL;DR: An inductively coupled mass spectrometric (ICP-MS) method for the determination of mercury in whole blood and urine was developed in this paper, where gold and dichromate in hydrochloric acid were evaluated as agents to reduce mercury spray chamber memory.

TL;DR: In this paper, a diode laser is used for the selective excitation of 235 U and 238 U in a laser-induced plasma applying Nd:YAG laser pulses to UO 2 samples.

TL;DR: In this paper, a characterization theory is constructed to relate external control parameters to averaged values of internal plasma properties, based on a study on the effect of transport fluxes on elementary balances.

TL;DR: In this article, the photon scattering model of a Monte Carlo simulation code for synchrotron radiation X-ray fluorescence (SRXRF) spectrometers is evaluated at high Xray energies (60-100 keV) by means of a series of validation experiments performed at Beamline BW5 of HASYLAB.

TL;DR: An improved ion pair chromatographic method with methodological enhancements for the separation, qualitative and quantitative determination of nonvolatile selenium compounds extracted from different samples has been developed using ICP-MS as an element-selective detector as mentioned in this paper.

TL;DR: In this article, a Meinhard nebulizer was modified by insertion of a capillary tube into the sample introduction channel, and the tetrahydroborate solution was mixed just prior to nebulization.

TL;DR: In this paper, the analytical characteristics, possibilities and limitations of a compact and easily transportable small-beam XRF instrument are described, and a simple micro-polishing technique that may be performed in situ in combination with the measurements is shown to be effective for the determination of the bulk composition of corroded bronze objects.

TL;DR: In this article, the absolute transport efficiency of the Perkin-Elmer HGA-600MS electrothermal vaporizer was determined using experimental conditions typical of those applied to real analysis by ETV-ICP-MS.

TL;DR: In this article, a flow injection system was coupled to a tungsten coil electrothermal atomizer (150 W) for on-line separation and preconcentration of lead based on its electrochemical reduction on the atomizer surface.

TL;DR: In this article, the Compton peak was used as internal standard in total reflection X-ray fluorescence (TXRF) determination for trace element determination of Fe, Cu, Zn, Se and Pt.

TL;DR: In this article, the boron memory effect in inductively coupled plasma-mass spectrometry is characterized theoretically and verified experimentally. But, the skimmer, the sampler, the ion lenses, the quadrupole and other components of the mass spectrometer are not responsible for the memory effect.

TL;DR: In this article, a modified microwave plasma torch (MPT) operated at 100 W with argon by means of spatially resolved Thomson scattering measurements and photographic records of the MPT at different working conditions is reported.

TL;DR: The mechanism by which carbon matrix species cause non-spectroscopic matrix interference on boron (B) and beryllium (Be) during the determination of B in biological samples is investigated in this paper.

TL;DR: In this paper, a narrowband Ti:Sapphire laser was scanned across the 780.02-nm transition of the rubidium isotopes and a detection limit of 25 ppm for the individual isotopes was obtained.

TL;DR: In this paper, the energy variation of a refracted X-ray beam by a silicon wafer was well explained by the simple Snell's law when the position of the detector (solid-state detector) was changed.

TL;DR: In this paper, a flow injection system composed of a microcolumn connected to the tip of the autosampler was used for preconcentration of Sb(III) chelate with ammonium pyrrolidine dithiocarbamate (APDC).

TL;DR: In this article, the spectral interferences in inductively coupled plasma atomic emission spectrometry (ICP-AES) encountered with environmental materials are dealt with, and the accuracy of ICP-AAS with the Q-concept as a basic methodology is checked by the analysis of a certified reference material IAEA/Sediment SD-N-1/2/.

TL;DR: In this article, a sensitive atomic absorption spectrometric procedure for lead determination in fractions from crude oil distillation was developed, where lead was present in organic form in the samples analysed therefore the behaviour of various lead compounds (Pb-alkylarylsulphonate, Pb-4-cyclohexanobyrate, tetraethyllead, P b in fuel oil) was studied.

TL;DR: In this article, lineshapes expected in high-resolution double-resonance ionization spectroscopy are calculated using the density matrix formalism, integrated over experimentally realistic conditions including atomic velocity and angular distributions as well as laser intensity profiles.

TL;DR: In this article, the authors used a Ge(HP) detector with an ultra-thin NORWAR entrance window to detect low-Z surface contamination on Si-wafers using synchrotron radiation as an excitation source.