Solid Phase Extraction and Spectrophotometric Determination of Silver with 2-(2-Quinolylazo)-5-diethylaminophenol as Chromogenic Reagent

Yang, Guangyu; Hu, Qiu‐Fen; Yang, Jihong; Huang, Zhangjie; Yin, Jie

doi:10.2116/analsci.19.299

Cited by 18 publications

(10 citation statements)

References 16 publications

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“…Based on Refs. [17][18][19][20], the authors proposed and explored the two types of techniques, namely the SPE and the LLE of the quaternary ammonium surfactant. The joint research of the two types of techniques obtained satisfactory results, and we are looking forward to discovering some new highlights and enriching the knowledge of extraction chemistry in theory.…”

Section: Introductionmentioning

confidence: 99%

Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

Xie

Yang

et al. 2014

Rare Met.

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The solid-phase extraction (SPE) technique applied to the extraction of organic compound was creatively used as the extraction of inorganic gold in the paper. Two types of techniques were proposed and explored, namely the SPE and the liquid-liquid extraction (LLE) of the quaternary ammonium surfactant [cetytrimethyl ammonium bromide (CTMAB), cetyl pyridine bromide (CPB), benzyl dimethyl dodecyl ammonium chloride (BDMDAC), and dodecyl trimethyl ammonium chloride (DTMAC)]. The surfactant could react with Au(CN) 2 -to form the ionic complex, and the compound could be extracted by SPE column of reversed-phase bonded silica gel. Hence, a new method of SPE was proposed to extract gold with these features of the high selectivity, the reliability, and the simplicity. The experimental result shows that the recovery rate of gold is more than 98 %, and the solid-phase extraction column is not easily damaged and it can be repeatedly used. The new method can be used as the extraction process of gold from alkaline cyanide solution as well. Besides, the paper also puts forward a new process of gold extraction.

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Section: Introductionmentioning

confidence: 99%

Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

Xie

Yang

et al. 2014

Rare Met.

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“…Thus, pre-concentration procedures are often required. Different techniques such as solvent extraction, 9 membrane filtration, 10 cloud point extrac-tion 11 and solid phase extraction 12,13 have been used to enrich the analyte and separate it from the interferences. Solid phase extraction has frequently been applied to the preconcentration and determination of ultra-trace analytes in complex matrix samples by instrumental methods.…”

Section: Introductionmentioning

confidence: 99%

Determination of Silver by Flame Atomic Absorption Spectrometry after Preconcentration on Naphthalene Modified with Dithizone

Fat'hi

Pourreza

Purweis

2009

J Chinese Chemical Soc

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A solid-phase extraction method for preconcentration of silver and consequent determination by atomic absorption spectrometry is described. The method is based on the adsorption of silver on naphthalene modified with dithizone in a column. The adsorbed silver is eluted from the column with a thiourea solution and determined by flame atomic absorption spectrometry. The adsorption conditions including pH, reagent concentration, eluent volume, flow rate and interfering ions were investigated. The calibration graph was linear in the range 10-1000 ng mL -1 of Ag in the initial solution with r = 0.9998. The limit of detection based on 3S b was 3.9 ng mL -1 . The relative standard deviation for ten replicate measurements of 40 and 600 ng mL -1 of Ag was 4.4% and 0.9%, respectively. The method was applied to the determination of silver in mineral, radiology film and wound dressing samples.

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“…[9][10][11][12][13][14][15][16] In previous work, we reported some 2-quinolylazo-phenol reagents for the determination of metal ions. [16][17][18][19][20][21] This kind of reagent, because of its larger conjugated system, has a higher sensitivity than pyridylazo reagents. However, the 2-quinolylazo-phenol reagent has also the disadvantage of its poor selectivity because both the oxygen atoms and nitrogen atoms donate to the metal ions.…”

Section: Introductionmentioning

confidence: 99%

Study on Solid Phase Extraction and Spectrophotometric Determination of Nickel in Waters and Biological Samples

Hu¹,

Yang²,

Huang³

et al. 2004

Bulletin of the Korean Chemical Society

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A sensitive, selective and rapid method for the determination of nickel based on the rapid reaction of nickel(II) with QADMAA and the solid phase extraction of the Ni(II)-QADMAA chelate with C 18 membrane disks has been developed. In the presence of pH 6.0 buffer solution and sodium dodecyl sulfonate (SDS) medium, QADMAA reacts with nickel to form a violet complex of a molar ratio of 1 : 2 (nickel to QADMAA). This chelate was enriched by solid phase extraction with C 18 membrane disks. An enrichment factor of 50 was obtained by elution of the chelates form the disks with the minimal amount of isopentyl alcohol. The molar absorptivity of the chelate was 1.32 × 10 5 L mol −1 cm −1 at 590 nm in the measured solution. Beer's law was obeyed in the range of 0.01-0.6 µg/mL. This method was applied to the determination of nickel in water and biological samples with good results.

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Solid Phase Extraction and Spectrophotometric Determination of Silver with 2-(2-Quinolylazo)-5-diethylaminophenol as Chromogenic Reagent

Cited by 18 publications

References 16 publications

Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

Determination of Silver by Flame Atomic Absorption Spectrometry after Preconcentration on Naphthalene Modified with Dithizone

Study on Solid Phase Extraction and Spectrophotometric Determination of Nickel in Waters and Biological Samples

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