Behaviour of the dithiocarbamate complexes of arsenic, antimony, bismuth, mercury, lead, tin and selenium in methanol with a hydride generator

Vuchkova, Lili; Arpadjan, Sonja

doi:10.1016/0039-9140(95)01780-1

Cited by 33 publications

(13 citation statements)

References 6 publications

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“…The obtained detection limit was also comparable with those obtained by other more sophisticated techniques and manifolds or expensive sorbent materials. So the detection limit obtained by Vuchkova et al [38] was 30 ng ml −1 by mean the preconcentration and ICP determination of Pb(II) in water samples using dithiocarbamate in methanol. Future research can be focused on testing the ability of TS-gel and its performance for on-line determination of other metals with other detection techniques more sensitive than ICP-AES technique with a neumatic nebulizer.…”

Section: Discussionmentioning

confidence: 92%

“…The most important improvements are derived from the fact from working in closed systems whose requirements on the laboratory environment for trace analysis are much less stringent, reduced consumption of reagent and high sampling frequencies what justifies the current trend toward an increase in the use of these preconcentration techniques. Arpadjan and co-workers [14,15] applied column solid-phase extraction using dithiocarbamate-loaded polyurethane foam to the preconcentration of lead. Nevertheless, in addition to the need to introduce an organic solvent (which requires a careful control of the experimental parameters) to dissolve the lead-dithiocarbamate complex, this technique is time-consuming because a new column have to be prepared for each experiment.…”

Section: Introductionmentioning

confidence: 99%

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Automatic on line preconcentration and determination of lead in water by ICP-AES using a TS-microcolumn

Zougagh

Torres

Alonso

et al. 2004

Talanta

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A simple, sensitive, low-cost and rapid, flow injection system for the on-line preconcentration of lead by sorption on a microcolumn packed with silica gel funtionalized with methylthiosalicylate (TS-gel) was developped. The metal is directly retained on the sorbent column and subsequently then eluted from it by EDTA. Five variables (sample flow rate, eluent flow rate, eluent concentration, pH and buffer concentration) were considered as factors in the optimization process. Interactions between analytical factors and their optimal levels were investigated using two level factorial and Box-Behnken designs. The optimum conditions established were applied to the determination of lead by flow injection inductively coupled plasma atomic emission spectrometry (FI-ICP-AES). The proposed method has a linear calibration range from 10 to at least 500 ng ml −1 of lead. At a sample frequency of 24 h −1 and a 120 s preconcentration time, the enrichment factor was 41, the detection limit was 15.3 ng ml −1 (S/N = 3) and the precision, expressed as relative standard deviation, was 0.9% (at 100 ng ml −1 ). Validation of the developed method was carried out against electrothermal atomic absorption spectrometry analysis without statistically significant differences between the proposed method and the atomic absorption method.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Automatic on line preconcentration and determination of lead in water by ICP-AES using a TS-microcolumn

Zougagh

Torres

Alonso

et al. 2004

Talanta

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“…[29] Hydrochloric acid solution with saturated boric acid was often employed as the carrier solution to reduce the competition for free radicals from Se 4þ . [29] Hydrochloric acid solution with saturated boric acid was often employed as the carrier solution to reduce the competition for free radicals from Se 4þ .…”

Section: Effect Of Carrier Solution Hcl Solutionmentioning

confidence: 99%

Determination of Tin in Pure Copper by Flow‐Injection Hydride Generation Atomic Absorption Spectrometry

Zhong

Lin

Chen

et al. 2005

Spectroscopy Letters

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A reliable method was established for the determination of tin in pure copper by flow-injection hydride generation atomic absorption spectrometry. The determination of tin in pure copper often suffers from interference from the copper matrix. In this work, cupferron was used as a chelating reagent to separate the copper from the tin. At pH 3.0, copper ion could form stable cupferron complex and could be removed from sample solution by chloroform extraction without loss of tin. After most of the chloroform dissolved in the aqueous solution had been removed, tin could be determined at 224.6 nm with the optimized conditions of 1.0% HCl as carrier solution and 0.8% m/v NaBH 4 as reductant. A pure copper standard reference material, SRM 396 unalloyed copper, was analyzed with the proposed method. A calibration curve was obtained with a linear range of 113 mg L 21 and a detection limit of 0.25 mg L 21 . The experimental results obtained for certified values were 0.76 + 0.3 and 0.8 + 0.03 mg g 21 , respectively. A recovery of 93.7 + 2.6% (n ¼ 5) was obtained. This established that the method was applicable to the determination of tin in pure copper with good accuracy and precision.

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“…Due to such wide concentration level of arsenic as well as its considerable toxicity, a great number of techniques for arsenic determination have been applied [3][4][5][6][7][8][9] sense a technique commonly used is hydride generation (HG). It allows low detection limits and has found wide applications in the determination of trace levels of arsenic combined with atomic absorption spectrometry [10][11][12], atomic fluorescence spectrometry (AFS) [13][14][15] or coupled with optical emission spectroscopy-inductively coupled plasma (ICP-OES) [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Several on-line solid phase extraction (SPE) methodologies have been developed, and the majority of them employs ionic exchange resins [19,23,24], modified silica gel [25][26][27], coated polyurethane foam [19], ethyl vinyl acetate (EVA) knotted reactors [28][29][30], PTFE knotted reactors [31,32] and PTFE turning-packed mini-columns [20], among others adsorbent materials.…”

Section: Introductionmentioning

confidence: 99%

On-line arsenic co-precipitation on ethyl vinyl acetate turning-packed mini-column followed by hydride generation-ICP OES determination

Gil

Ferrúa

Salonia

et al. 2007

Journal of Hazardous Materials

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Behaviour of the dithiocarbamate complexes of arsenic, antimony, bismuth, mercury, lead, tin and selenium in methanol with a hydride generator

Cited by 33 publications

References 6 publications

Automatic on line preconcentration and determination of lead in water by ICP-AES using a TS-microcolumn

Automatic on line preconcentration and determination of lead in water by ICP-AES using a TS-microcolumn

Determination of Tin in Pure Copper by Flow‐Injection Hydride Generation Atomic Absorption Spectrometry

On-line arsenic co-precipitation on ethyl vinyl acetate turning-packed mini-column followed by hydride generation-ICP OES determination

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