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Showing 1 to 19 of 19 for “"Hydride generation"”.
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Flow injection analysis (FIA) determination of lead by hydride generation in banded coral skeletons /
A flow injection hydride generation direct current plasma atomic emission spectrometric (FI-HG-DCP-AES) method was developed for the determination of lead at ng.ml-l level. Potassium ferricyanide (K3Fe(CN)6) was used along with sodium tetrahydroborate(III) (NaBH4) to produce plumbane (PbH4) in an …
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Development and Application of Hydride Generation Laser Induced Fluorescence Method for Quantitative Analysis of Bismuth and Germanium
Continuous flow hydride generation coupled with laser induced fluorescence spectrometry (HG-LIF) has been investigated for the measurements of Bi (III) and Ge (IV) in aqueous samples. The developed HG-LIF method has been evaluated in terms of analytical figures of merit. The limits of detection …
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Arsenic speciation by ion-exchange chromatography with on- line determination by hydride generation: electronic modification of the D.C. plasma by photon counting
… acid (MMAA), and dimethylarsinic acid (DMAA) by hydride generation was demonstrated. The instrument used was a d.c. plasma atomic emission spectrometer (OCP-AES). Complete recovery was reported for As(III), As(V), and DMAA while 86% recovery was reported for MMAA. Detection limits were …
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Continuous hydride generation in the presence of L- cysteine for the determination of arsenic, bismuth, antimony and tin in steels by inductively coupled plasma atomic emission spectrometry
… tin were simultaneously determined by continuous hydride generation and inductively coupled plasma-atomic emission spectrometry . I Hydrides were introduced into four different types of gas-liquid separators. Two of the gas-liquid separators were available in-house. A third was developed for this …
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New Approaches to Automated Analytical Instrumentation
… automated analytical equipment for cold vapour/hydride generation is described. Various designs of gas-liquid separators (GLS) were investigated for continuous flow hydride generation, including a glass 'U' tube GLS, a silicone rubber membrane GLS and a microporous polytetrafluoroethylene …
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AGRICULTURAL ANALYSIS BY PLASMA EMISSION SPECTROSCOPY WITH SLURRY ATOMISATION
… introduced using aqueous solution nebulisation, hydride generation and slurry atomisation. For aqueous solutions, simplex optimisation with signal to background ratio as the criterion of merit, vertical viewing position was found to be most critical. A continuous-flow hydride generator was …
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Colorimetric determination and speciation of arsenic with silver diethyldithiocarbamate
… inorganic arsenic with SDDC after selective hydride generation are described. The observed detection limits of 5 {dollar}\mu{dollar}g As(III)/L and 7 {dollar}\mu{dollar}g As(V)/L are considerably lower than those of previously described SDDC techniques. Organic arsenicals are neither …
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Determination of Arsenic and Arsenic Species in Ombrotrophic Peat Bogs from Finland
… samples at low ng l-1 concentrations, namely hydride generation – atomic absorption spectrometry (HG-AAS), hydride generation – atomic fluorescence spectrometry (HG-AFS) and inductively coupled plasma – sector field – mass spectrometry (ICP-SF-MS) were developed. The analytical procedures were …
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Studies of arsenic, copper and lead in the soils of the Tamar Valley
… were separated and detected on a HPLC/FAAS hydride generation interface. In aerobic soils arsenate was the predominant soluble species in the pore water. Where mineralization and mining activities have elevated arsenic levels arsenite and monomethylarsonic acid were found. In anaerobic soils …
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Arsenic dispersion associated with the Barbrook gold mine in the Mpumalanga Province of South Africa
… on the various samples, including As analysis by hydride generation-atomic absorption spectroscopy and inductively coupled plasma - mass spectrometry. The Barbrook ore bodies are structurally controlled and hosted by banded iron formation, carbonaceous shales and carbonate-bearing schists. Within …
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Antimony isotopes as indicators of redox reactions in aqueous systems: fractionation during Sb(V) reduction by sulfide and isotope exchange kinetics between dissolved Sb(III) and Sb(V)
… reactions. We use anion exchange resin and hydride generation MC-ICP-MS methods to obtain precise measurements of 123Sb/121Sb. The anion exchange method is also effective for separating Sb(III) from Sb(V). First, we find that isotopic exchange between aqueous Sb(V) and Sb(III) at higher than …
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The development of methods for the determination of selenium using spectrofluorimetric and ICP-MS techniques.
… photoreduction of Se (VI), and post column hydride generation before ICP-MS detection. Separation of the three species was achieved with excellent resolution in less than 18 minutes. The limit of determination for the three species was 0.50 mug L[-1].
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ANTIMONY SPECIATION BY CHROMATOGRAPHIC SAMPLE INTRODUCTION TO PLASMA SPECTROSCOPY
… sediment and plant (liverwort, moss) extracts. Hydride generation (HG) apparatus placed in-line between the HPLC and the plasma instrument facilitated analysis of reducible species and it was found that for many samples not all the Sb was in a reducible form. This was confirmed by comparison …
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Studies on Selected Microbial Biotransformations of Arsenic Compounds
… breakdown by mixed biota with analysis by HPLC-hydride generation-atomic fluorescence spectroscopy (HG-AFS). Subsequent selection within this consortium led us to four bacterial isolates that demonstrated the biodegradation of arsenobetaine to dimethylarsinate. Two of these isolates are …
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THE INTERFERENCE FREE DETERMINATION OF SELENIUM IN ENVIRONMENTAL AND CLINICAL SAMPLES BY ICP-MS
… with established ICP-MS methods involving hydride generation and the use of organic solvents with pneumatic nebulisation was performed. Full uncertainty estimates for each of the procedures investigated were calculated. The uncertainty estimates calculated highlight the improvements in …
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IN-SITU PRECONCENTRATION OF TRACE METALS IN NATURAL WATERS AND BRINES WITH ANALYSIS BY FLOW INJECTION ATOMIC SPECTROMETRY
… and sensitivity was improved by the adoption of hydride generation prior to analysis for the determination of Se(IV). Se(VI) was determined after off-line pre-reduction to Se(IV). The method was tested by the determination of inorganic selenium in an SRM, NIST 1643C, Trace elements in water and …