Arsenic speciation in waste waters by extraction chromatography followed by atomic absorption spectrometry

Russeva, E.; Havezov, I.; Detcheva, Albena

doi:10.1007/bf00323814

Cited by 25 publications

(12 citation statements)

References 19 publications

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“…Analyte element dissolves in droplets of molten Pd or PdO, possibly forming a compound. The rate-limiting step leading to atomization appears to be diffusion of the analyte through Pd particles [8,9]. Addition of Zr, W increases the speed of diffusion by causing Pd to form smaller droplets, and hence produces sharper absorbance peaks (physical mechanism of analyte modification).…”

Section: Resultsmentioning

confidence: 99%

“…At the end of pyrolysis stage all tungsten (zirconium, respectively) was converted into finely dispersed refractory carbide, which "heal" the defects on the graphite surface, especially those on the edges of the platform [8]. Excess tungsten or zirconium may be necessary to "block" active sites on the graphite platform surface and hence inhibit formation of any ternary alloy having analyte element carbide and palladium components.…”

Section: Resultsmentioning

confidence: 99%

“…Up to now there are few applications of these modifiers [3,6,8] for real analysis, although all above mentioned advantages are well known. It seems that some limitations restrict the area of application of these modifiers.…”

mentioning

confidence: 96%

“…The exceptional effectivity of palladium-containing modifiers and especially of the mixed palladium modifiers has not been studied so far [2][3][4][5][6][7][8]. A thorough investigation of the advantages and limitation of the mixed palladium-containing chemical modifiers is needed.…”

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confidence: 99%

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Study of some palladium-containing chemical modifiers in graphite furnace atomic absorption spectrometry

1995

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 96%

mentioning

confidence: 99%

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Study of some palladium-containing chemical modifiers in graphite furnace atomic absorption spectrometry

1995

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“…6 The oxidation states of arsenic play important roles in the toxicity as well as in its behavior in aquatic systems. [7][8][9][10] Inorganic arsenic(III) is considered to be much more toxic than inorganic arsenic(V). Furthermore, inorganic arsenic compounds are more toxic than organic arsenic compounds.…”

Section: Introductionmentioning

confidence: 99%

A Simple in situ Visual and Tristimulus Colorimetric Method for the Determination of Trace Arsenic in Environmental Water after Its Collection on a Mercury(II)-Impregnated Paper

et al. 2004

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A simple in situ visual and tristimulus colorimetric method for the determination of trace arsenic in environmental water after collecting arsenic on a test paper impregnated with mercury(II) bromide and rosaniline chloride by its reduction aeration has been developed. The color development on the test paper is based on the formations of AsH(HgBr)2 (yellow) and/or As(HgBr)3 (brownish yellow) by a reaction between mercury(II) bromide and arsine (AsH3), which is produced through the reduction of As(III) (arsenite ion) and/or As(V) (arsenate ion) in a sample solution. To a sample solution, potassium iodide, tin(II) chloride, zinc sand and 4 ml of 6 M hydrochloric acid solution were added successively. The liberated arsine was collected on the test paper. The yellow or brownish-yellow color intensity on the test paper was measured by a tristimulus colorimeter and also by a visual method. The established method is applicable to the determination of arsenic in environmental water sample such as river, brackish, and seawater types.

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Use of the Anion-Exchange Resin Amberlite IRA-93 for the Separation of Arsenite and Arsenate in Aqueous Samples

Bissen

Gremm

Köklü

et al. 2000

Acta hydrochim. hydrobiol.

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The method described uses the separation of As(III) and As(V) species in aqueous samples by means of the anion‐exchange resin Amberlite IRA‐93. The samples were acidified using acetic acid and passed through a glass column filled with pre‐treated Amberlite IRA‐93 resin. As(III) was poorly adsorbed on the anionic exchanger material, whereas As(V) was retained. The arsenic concentration was measured in the column effluent by graphite furnace AAS (GF‐AAS). The retained As(V) was eluted from the column using 1 M NaOH. Prior to the determination of the As(V) concentration in the NaOH eluate, the eluate was passed through a glass column filled with a cation‐exchange resin (Amberlite 200) to remove sodium ions and minimize the Na+ interference with the AAS determination. After calibration the method was applied to the separation of As(III) and As(V) species in two aqueous extracts of arsenic contaminated soils. The results were compared with those obtained from an on‐line separation and determination of As(III) and As(V) in the aqueous soil extracts using a state of the art HPLC‐ICP‐MS system.

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Arsenic speciation in waste waters by extraction chromatography followed by atomic absorption spectrometry

Cited by 25 publications

References 19 publications

Study of some palladium-containing chemical modifiers in graphite furnace atomic absorption spectrometry

Study of some palladium-containing chemical modifiers in graphite furnace atomic absorption spectrometry

A Simple in situ Visual and Tristimulus Colorimetric Method for the Determination of Trace Arsenic in Environmental Water after Its Collection on a Mercury(II)-Impregnated Paper

Use of the Anion-Exchange Resin Amberlite IRA-93 for the Separation of Arsenite and Arsenate in Aqueous Samples

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