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spectrophotometric method for determination of gold shoulder geo agl forume

A simple spectrophotometric method for

Cited by: 17

Kinetic spectrophotometric method for gold(III)

Cited by: 20

A simple spectrophotometric method for

A simple, sensitive, and selective second order derivative spectrophotometric method has been developed for the simultaneous determination of gold(III) and cobalt(II) using 2-hydroxy-3-methoxy ...

Spectrophotometric Determination of Gold(III) Using 2 ...

Cited by: 3

Kinetic spectrophotometric method for gold(III)

The kinetic spectrophotometric method for Au(III) determination was developed and validated. It was based on the catalytic effect of gold on the oxidation of methylene blue B (3,7di-(dimethyl ...

Studies of titrimetric and spectrophotometric

Cited by: 28

A Simple and Selective Spectrophotometric Method

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Spectrophotometry determination of gold using Septonex

The proposed method was tested on samples containing gold as the cyanide complex. This complex was converted to the [AuCl 4]" complex anion by reducing to the metal (using granulated zinc and concentrated HCl) and dissolving, as described under the preparation of the stock gold solution. Table 2 Determination of gold in sample Method AAS Method ...

Determination of mercury (II) by spectrophotometric

2020-7-22  The aggregation of functionalized gold nanoparticles and mercury (II) caused the shift of maximum absorption peak of the UV-Vis spectrum from 520 nm to 609 nm. Based on this principle, a simple spectrophotometric method for determination of mercury (II) was preliminarily established. The detection limit of the developed method for determination of

CTAB-Capped Gold Nanoparticles as a New Probe for ...

A simple, fast, and sensitive spectrophotometric method is reported for the determination of heparin concentration in human plasma samples. The assay is based on enhancing the extinction intensity of CTAB-capped gold nanoparticles in the presence of heparin molecules. The strong electrostatic interaction of the positively-charged gold nanoparticles with the negatively charged heparin molecules ...

Spectrophotometric Determination of Palladium(II)

The simple, rapid spectrophotometric method for palladium(II) ions determination using a new analytical reagent is described. The interaction of Pd(II) ions with a reagent, of the class of azolidones, 4-( N ′-(4-imino-2-oxo-thiazolidine-5-ylidene)-hydrazino)-benzoic acid, in water medium results in the formation of a complex. The Pd(II)-p-ITYBA complex shows maximum absorbance at a ...

Spectrophotometric Determination of Gold (III) using ...

A Tolterodine tartrate (TLD) (R)-N, N-diisopropyl-3-(2-hydroxy-5-ethylphenyl)-3-phenylpropanamine L-hydrogen tartrate reagent. Its molecular formula and molecular weight are C 26 H 37 NO 7 and 475.6 respectively, was employed for the sensitive spectrophotometric determination of gold(III). The gold(III) ion forms a violet-colored complex with TLD in an aqueous solution at pH 4.0.

Improved rhodanine method for the

2002-5-1  Highly sensitive and selective spectrophotometric method for determination of trace gold in geological samples with 5-(2-hydroxy-5-nitrophenylazo)rhodanine Li Zaijun , Pan Jiaomai , Tang Jian Analytical and Bioanalytical Chemistry 2003 375 (3), 408-413

Spectrophotometric determination of dissolved

A simple and sensitive spectrophotometric method for the determination of dissolved oxygen (DO) in water has been developed involving the dissolution of a gelatin-stabilized gold sol formed with cyanide ion in the presence of oxygen. The coloured sol is converted into the

Spectrophotometric determination of gold by

A spectrophotometric method for the determination of gold has been developed, based on the reaction of gold(III) with molybdate and nile blue (NB) to form The molar absorptivity at 595 nm is 2.71 × 105 l

A Facile Colorimetric and Spectrophotometric Method

2020-3-12  For the determination of Metformin in human serum, a facile colorimetric and spectrophotometric sensor was designed based on citrate-capped gold nanoparticles (citrate-GNPs). In this probe, the addition of Metformin to GNP solution generates a naked-eye color change resulting from the aggregation of GNPs. Study of this color conversion and quantity analysis of analyte is operated

Spectrophotometric Determination of Gold(III) through ...

2019-5-30  An aqueous solution of gold(III)-geiatin complex has been found suitable for the spectrophotometric determination of gold(III) in the range 0.6 I1grnl"1-72 I1gml" I after its reduction to a pink-coloured gold sol with hydrazine. The reduction is found to be first order with respect to [Au(III)complex).The pink coloured

In-situ microscale spectrophotometric determination

A rapid method for the sensitive detection of phenytoin (PHT) by branched gold nanoparticles (B-AuNPs) is described. These nanoparticles were synthesized by adding methanol as the reducing agent and...

A simple and selective spectrophotometric method

The aim of present study is to develop a simpler direct spectrophotometric method for the trace determination of gold with BSOPD in aqueous solutions, and the presence of inexpensive nonionic micelles, such as polyoxyethylene octylphenyl ether (TX-100), in aqueous solutions.

Spectrophotometric micro determination of silver(I)

A new chromogenic reagent, meloxicam was used for highly sensitive, selective and rapid method for the determination of silver based on the rapid reaction of silver(I) with meloxicam. In the presence acetate buffer solution of pH 4.6 and Triton X-100 as an optimum medium, meloxicam reacts with silver to form a yellow complex of molar ratio 1:1 ...

Spectrophotometric determination of gold by

A spectrophotometric method for the determination of gold has been developed, based on the reaction of gold(III) with molybdate and nile blue (NB) to form The molar absorptivity at 595 nm is 2.71 × 105 l

Spectrofluorimetric method for atenolol

Abstract. A simple and sensitive spectrofluorimetric method for determination of atenolol (ATE) using gold nanoparticles (AuNPs) was developed. The method is based on the quenching effect of atenolol on photoluminescence of AuNPs at λ em = 705 nm. Variables affecting luminescence of gold nanoparticles such as the solvent, pH value and surfactant were studied and optimized.

Spectrophotometric Label-Free Determination of Lead

2019-4-9  Prior incubation of the gold nanoparticles with lead decreased the 4-(methylthio)-1-butanol-induced aggregation of gold nanoparticles in a dose-dependent manner. A linear inverse relationship between the logarithmic concentration of lead and the ratio of absorbance at 650 to 520 was noted. The method has a dynamic range from 10 nM to 100 µM.

A Simple and Selective Spectrophotometric Method

A Simple and Selective Spectrophotometric Method for the Determination of Trace Gold in Real, Environmental, Biological, Geological and Soil Samples Using Bis (Salicylaldehyde) Orthophenylenediamine By Rubina Soomro, M. Jamaluddin Ahmed, Najma Memon and Humaira Khan

Solid phase extraction and a spectrophotometric method

2009-9-22  Solid phase extraction and a spectrophotometric method for the determination of trace amounts of gold with 4-rhodanineazo benzoic acid ZHANG JIE HUANG*, XIAO GUO WANG and JUN ZHANG Department of Chemistry, Yunnan University, Kunming, 650091, P. R. China (Received 19 January, revised 18 May 2009)

Determination of Trace Sliver by Catalytic-kinetic ...

A new catalytic-kinetic spectrophotometric method has been developed for the determination of trace silver,it is based on its catalytic effects on the oxidation-reduction reactions of 4-amino antipyrine-potassium ferricyanide(III) and color development reaction with ...

Spectrophotometric micro determination of silver(I)

A new chromogenic reagent, meloxicam was used for highly sensitive, selective and rapid method for the determination of silver based on the rapid reaction of silver(I) with meloxicam. In the presence acetate buffer solution of pH 4.6 and Triton X-100 as an optimum medium, meloxicam reacts with silver to form a yellow complex of molar ratio 1:1 ...

Highly selective flow injection spectrophotometric ...

2006-11-21  A highly selective and simple flow injection method is reported for the determination of Au(III) in jewel samples. The method is based on the catalytic effect of Au(III) on the oxidation of 4-amino-4'-methoxydiphenylamine hydrochloride (Variamine Blue B base, VB) by KIO(3).

KINETIC DETERMINATION OF GOLD(III) BASED ON ITS

2019-11-1  Keywords: gold(III), kinetic method, sunset yellow. 1. INTRODUCTION Chemistry of gold is still the subject of research in scientific articles, not only because of its beauty and rarity and usage in jewelry, coinage and economics. Many properties of a gold(III) and gold-nanoparticles as enzyme inhibitor, vehicles for delivery of cancer

Development of new analytical methods for the ...

NIR spectrophotometric method cannot be used directly for the determination of caffeine in aqueous solution of green coffee beans. In the NIR region water absorbs strongly, the free spectral range is not wide and on the free spectral range available the absorption of aqueous solution of