Reagent injection FIA system for lead determination by hydride generation - quartz-tube atomic absorption spectrometry

Baranguan, M. T.; Laborda, Francisco; Castillo, Juan R.

doi:10.1007/s00216-002-1465-x

Analytical and Bioanalytical Chemistry

2002

DOI: 10.1007/s00216-002-1465-x

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Reagent injection FIA system for lead determination by hydride generation - quartz-tube atomic absorption spectrometry

M. T. Baranguan

Francisco Laborda

Juan R. Castillo

Abstract: A method is proposed for the determination of lead by generation of its hydride and detection by quartz-tube AAS using a reagent injection FIA system based on the injection of sodium tetrahydroborate. Lead hydride generation was carried out using a combination of 0.5 M nitric acid, 10% m/ v hydrogen peroxide and 10% m/ v sodium tetrahydroborate. The characteristic concentration obtained was 3.1 ng mL(-1) and the detection limit was 2.6 ng mL(-1) for an injected volume of 0.125 mL of tetrahydroborate.

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Cited by 10 publications

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Porous Bismuth Film Electrodes for Signal Increase in Anodic Stripping Voltammetry

Urbanová¹,

Bartoš²,

Vytřas³

et al. 2010

Electroanalysis

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The hard sphere template approach has been used to elaborate highly porous bismuth film electrodes. These electrodes of controlled porosity show an increased internal electroactive area that can be used to enhance significantly the signals obtained for the detection of various metals like lead and cadmium by anodic stripping voltammetry. This leads to improved detection limits opening promising applications in the field of trace analysis.

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Porous Bismuth Film Electrodes for Signal Increase in Anodic Stripping Voltammetry

Urbanová¹,

Bartoš²,

Vytřas³

et al. 2010

Electroanalysis

View full text Add to dashboard Cite

show abstract

Lead ultra-trace on-line preconcentration and determination using selective solid phase extraction and electrothermal atomic absorption spectrometry: applications in seawaters and biological samples

et al. 2006

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In this work, a new chelating resin [1,5-bis (2-pyridyl)-3-sulphophenyl methylene] thiocarbonohydrazide immobilised on aminopropyl-controlled pore glass (550 A; PSTH-cpg) was synthesised and packed in a microcolumn which replaced the sample tip of the autosampler arm. The system was applied to the preconcentration of lead. When microliters of 10% HNO3, which acts as elution agent, pass through the microcolumn, the preconcentrated Pb(II) is eluted and directly deposited in a tungsten-rhodium coated graphite tube. With the use of the separation and preconcentration step and the permanent modifiers, the analytical characteristics of the technique were improved. The proposed method has a linear calibration range from 0.012 to 10 ng ml(-1) of lead. At a sample frequency of 36 h(-1) with a 90 s preconcentration time, the enrichment factor was 20.5, the detection and determination limits were 0.012 and 0.14 ng ml(-1), respectively and the precision, expressed as relative standard deviation, was 3.2% (at 1 ng ml(-1)). Results from the determination of Pb in biological certified reference materials were in agreement with the certified values. Seawaters and other biological samples were analysed too.

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Studies on the Efficiency of Hydrogen Selenide Generation with Different Acid Media by Continuous Flow Hydride Generation Atomic Absorption Spectrometry

Kumar

Riyazuddin

2006

Microchim Acta

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Reagent injection FIA system for lead determination by hydride generation - quartz-tube atomic absorption spectrometry

Cited by 10 publications

References 15 publications

Porous Bismuth Film Electrodes for Signal Increase in Anodic Stripping Voltammetry

Porous Bismuth Film Electrodes for Signal Increase in Anodic Stripping Voltammetry

Lead ultra-trace on-line preconcentration and determination using selective solid phase extraction and electrothermal atomic absorption spectrometry: applications in seawaters and biological samples

Studies on the Efficiency of Hydrogen Selenide Generation with Different Acid Media by Continuous Flow Hydride Generation Atomic Absorption Spectrometry

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