The application of electrodeposition on a tungsten wire to furnace atomic absorption spectrometry

Czobik, E.J.; Matoušek, J.P.

doi:10.1016/0584-8547(80)80013-9

Cited by 24 publications

(7 citation statements)

References 28 publications

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“…2,3 The use of a flame in FAAS implies the acceptation of two drawbacks: a complex gas management system able to ensure a safe operation under every condition, and a short residence time of the sample into the optical path 4 , given the fact that the flame is an open environment. Electrothermal atomizers [5][6][7][8] , mainly graphite furnaces 9,12 , or tungsten coils [13][14][15][16] in a lower extent, became an excellent alternative to overcome the problems depicted above. Nonetheless, for these alternatives and regardless the employment of standardized temperature platform furnaces, transverse heating or matrix modification 17,18 , high purity argon gas flow for protection of the heated cell is mandatory.…”

Section: Introductionmentioning

confidence: 99%

Electrothermal metallic furnace atomic absorption spectrometry

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Electrothermal metallic furnace atomic absorption spectrometry

et al. 2017

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“…This advantage is very important for determining toxicity levels of different species of elements. In this technique, electrolytic preconcentration is done by plating the metals on a pyrolytic graphite platform, 16 high melting-point metal wires 17 or a tubular pyrolytic graphite coated furnace, 18 used as an electrode. In some of these arrangements, flow systems have been designed.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Trace Silver Determination in Biological and Water Samples by Electrothermal Atomic Absorption Spectrometry after Electrodeposition on a Graphite Probe

Moradkhani

Rouhollahi

Shirkhanloo

et al. 2013

J Chinese Chemical Soc

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A rapid and simple procedure was developed for selective and sensitive determination of ultra-trace silver in biological and environmental samples using the electrodeposition on a graphite probe modified with palladium followed by electrothermal atomic absorption spectrometry. Several experimental parameters for the electrodeposition, such as deposition potential, electrolyte concentration, pH of solution and deposition time were optimized. The calibration graph after preconcentration was linear in the range of 10-250 ngL -1 with correlation coefficient of 0.9989 under the optimum conditions for procedure. The limits of detection (LOD) and quantification (LOQ) base on (3s) and (10s) were 2.8 ngL -1 and 9.4 ngL -1 respectively. Related standard deviation (RSD) for eight replicate measurements of 100 ngL -1 silver was 4.3%. Samples were digested completely in a closed microwave digestion system using only perchloric acid, and interference owing to various cations was also investigated. The proposed procedure was successfully applied to determine silver in blood, urine and some environmental samples with satisfactory analytical results.

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“…3,4 The electrolytic step of all these techniques is followed by ETAAS determination. However, this approach requires removal and replacement of the electrode (furnace, 3,5 platform, [6][7][8] tungsten wire, [9][10][11][12] mercury drop 13 and graphite disc probe 14,15 ) with the deposited element for each determination. Such manipulations result in contamination, poor reproducibility of measurements and a low sampling rate.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of in situ electrodeposition technique in electrothermal atomic absorption spectrometry

Krenželok

Rychlovský

Volný

et al. 2003

Analyst

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Conventional electrothermal atomic absorption spectrometric (ETAAS) equipment was extensively modified to enable automated in situ electrodeposition. The original autosampler injection Teflon capillary was replaced by a composite Pt/Teflon capillary which served as an anode in the electrodeposition circuit. Incorporation of a peristaltic pump and of a three-way solenoid under computer control into the sample dispenser circuit provided all necessary steps for automated electrodeposition-ETAAS determination. The automated sequence controlled addition of Pd modifier and of the analyte, electrolysis, withdrawal of spent electrolyte, rinsing, drying and atomization. Performance of the system was evaluated by analyzing Pb in 3% m/v NaCl. Optimization using factorial design yielded 3sigma detection limit of 20 pg Pb and reproducibility of 1.0-1.4% (for constant current electrodeposition), these values being superior to the results of conventional ETAAS of Pb in 0.5% m/v NaCl. Sensitivity of Pb determination is not affected by NaCl, NaOH, NaNO3 and NH4H2PO4, up to 4.6% m/v, demonstrating efficient matrix removal in the electrodeposition step.

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The application of electrodeposition on a tungsten wire to furnace atomic absorption spectrometry

Cited by 24 publications

References 28 publications

Electrothermal metallic furnace atomic absorption spectrometry

Electrothermal metallic furnace atomic absorption spectrometry

Ultra‐Trace Silver Determination in Biological and Water Samples by Electrothermal Atomic Absorption Spectrometry after Electrodeposition on a Graphite Probe

Evaluation of in situ electrodeposition technique in electrothermal atomic absorption spectrometry

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