Spectrophotometric Determination of Gold in Water and Ore with 2‐Carboxyl‐1‐Naphthalthiorhodanine

Chen, Zhangyu; Huang, Zhangjie; Chen, Jing; Yin, Jie; Su, Qingde; Yang, Guangyu

doi:10.1080/00032710500536103

Cited by 15 publications

(12 citation statements)

References 10 publications

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“…Among the several instrumental techniques spectrophotometric methods for the determination of metal ions have an attractive attention due to their simplicity and low operating costs. A variety of spectrophotometric methods for the determination of gold have, therefore, been reported which includes different chromophoric reagents, 2-[2-(4-dimethylamino-phenyl)-vinyl]-1,3,3-trimethyl-3H-indolium [1], bis(salicylaldehyde) orthophenylenediamine [2], 5-(4-carboxylphenyl-azo)-8-hydroxyquinoline [3], ethopropazine hydrochloride and isothipendyl hydrochloride [4], morin [5], and 2-carboxyl-1naphthalthiorhodanine [6].…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of Gold(III) Using 2-Hydroxy-3-Methoxy Benzaldehyde Thiosemicarbazone as a Chromophoric Reagent

Kumar

Reddy

2012

ISRN Analytical Chemistry

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A chromophoric reagent, 2-hydroxy-3-methoxy benzaldehyde thiosemicarbazone (HMBATSC), was employed for the sensitive spectrophotometric determination of gold(III). The gold(III) ion forms a blue-coloured complex with HMBATSC in an aqueous dimethyl formamide at pH 6.0. The gold complex shows the absorption maximum at 385 nm, and Beer's law was obeyed in the range 0.49–8.37 μg mL−1. The molar absorptivity and Sandell's sensitivity were found to be L mol−1 cm−1 and 0.015 μg cm−2, respectively. The complex shows 1 : 1 [Au(III) : HMBATSC] stoichiometry with a stability constant of . The interference effect of various diverse ions has been studied. In addition to zero-order, first- and second-order derivative spectrophotometric methods were also developed for the determination of gold(III) in microgram amounts which were more sensitive than the zero-order method. The developed method has been used for the determination of gold(III) in environmental water samples and certified reference materials. The results were in excellent agreement with the certified values.

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Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of Gold(III) Using 2-Hydroxy-3-Methoxy Benzaldehyde Thiosemicarbazone as a Chromophoric Reagent

Kumar

Reddy

2012

ISRN Analytical Chemistry

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“…However, the low level of gold in drinking waters is not compatible with the detection limit and some of these methods are expensive, unselective and require careful experimental conditions and considerable time consuming. Thus, preconcentration and separation techniques using liquid-liquid and liquid-solid are frequently required to improve the detection capability and the selectivity of these techniques [6,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Utility of solid phase extraction for spectrophotometric determination of gold in water, jewel and ore samples

Amin

2010

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…Commercial extractants containing phosphine oxides [20,21], amines [22], thiophosphinic acids [23], and calixarene derivatives [24] were investigated with respect to Au(III). Spectrophotometric determination of gold in water and ore with 2-carboxyl-1-naphthalthiorhodanine was studied by Chen et al [25]. Three derivatives of dibutylphosphonic acid, , 0 -bis(dibutylphosphonatol)-l,3-xylene and bis(dibutylphosphonato)alkanes, commonly known as the tetrabutyl 1,3-xylylenediphosphonate (TBmXDP) and tetrabutyl alkylenediphosphonates (TBADP), respectively, were synthesized by Chowdhury and Kamata [26] for use in solvent extraction of precious metals, especially Au(III) extraction from hydrochloric acid medium.…”

Section: Introductionmentioning

confidence: 99%

Selective extraction and determination of Au(III) by first-derivative spectrophotometry

Belhamel

2010

Journal of Coordination Chemistry

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The selective extraction of Au(III) in the presence of Zn(II) by salting-out of 2-propanol was investigated. The salting-out effect increased partitioning between water and 2-propanol in the presence of sodium chloride in aqueous-organic mixtures. This is observed through the distribution coefficient, which increases with salt addition. First-derivative spectrophotometry, which eliminates interference from overlapping spectral bands, was used for the determination of trace Au(III) in the presence of Zn(II). Absorption spectra were recorded and the firstderivative spectra were obtained using D ¼ 10 nm. The calibration graph was linear for 0.857-5.142 mg mL À1 and the detection limit was 0.038-8 mg mL À1 . The proposed method has been successfully applied to the determination of trace Au(III) in synthetic mixtures and Algerian low gold ore solutions. The results agree with those obtained by atomic absorption spectroscopy and the recoveries were 498%. The relative standard deviations were in all instances less than 3%.

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Spectrophotometric Determination of Gold in Water and Ore with 2‐Carboxyl‐1‐Naphthalthiorhodanine

Cited by 15 publications

References 10 publications

Spectrophotometric Determination of Gold(III) Using 2-Hydroxy-3-Methoxy Benzaldehyde Thiosemicarbazone as a Chromophoric Reagent

Spectrophotometric Determination of Gold(III) Using 2-Hydroxy-3-Methoxy Benzaldehyde Thiosemicarbazone as a Chromophoric Reagent

Utility of solid phase extraction for spectrophotometric determination of gold in water, jewel and ore samples

Selective extraction and determination of Au(III) by first-derivative spectrophotometry

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