Alizarin-s, a reagent for thorium. a gravimetric, colorimetric, and spectrophotometric study

Sarma, Dipjyoti; Rao, Bh. S. V. Raghava

doi:10.1016/s0003-2670(00)87915-5

Cited by 35 publications

(4 citation statements)

References 4 publications

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“…Alizarin Red S contains two hydroxyl groups and a sulfo group and can exist in three forms, depending on the acidity of the solution. 15 Such an amount of hydrophilic groups in the ARS structure ensures its high solubility in water; for this reason, there is no need to introduce additional solvents into the solution, which complicates the analyses. 16 ARS can react with metals such as Cu 2+ .…”

Section: Sensing Reagent Propertiesmentioning

confidence: 99%

Design of an optical sensor for the determination of cysteine based on the spectrophotometric method in a triacetylcellulose film: PC-ANN application

Montaseri

Yousefinejad

2014

Anal. Methods

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An optical sensor was developed for measuring the concentration of L-cysteine (Cys) based on the immobilization of an ARS-Cu complex to a transparent triacetylcellulose film. The spectrophotometric studies of the sensing films clearly indicate that the absorption enhances at 438 nm and decreases at 535 nm in acetate buffer solution pH 5.0 as a result of the interaction of Cys with Cu 2+ of the copper-ARS complex and the reduction of Cu 2+ to Cu + which cause the release of ARS. With the optode membrane described, Cys in a sample solution can be determined with the linear range of 47.8 to 637.0 mM which was improved to 18.9-672.0 mM by applying the PC-ANN algorithm. The proposed optode obtained a limit of detection equal to 7.32 mM and its response time was about 16 min, depending on the concentration of Cys. The measurements of Cys in a real sample via the new optical sensor have shown an excellent correlation with values obtained for the same samples using HPLC as a standard method.

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Section: Sensing Reagent Propertiesmentioning

confidence: 99%

Design of an optical sensor for the determination of cysteine based on the spectrophotometric method in a triacetylcellulose film: PC-ANN application

Montaseri

Yousefinejad

2014

Anal. Methods

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“…NAD(P)-hydrolysing enzymes have been demonstrated in a variety of organisms: animals (including mammals), plants (especially tumor tissues), protozoans, fungi and bacteria [1][2][3][4][5][6][7][8][9][10][11][12][13]. Attempts to determine the concentrations of metabolites in Streptomyces griseus led to the detection of an NAD(P)ase activity with an unusual high stability against strong mineral acids.…”

Section: Introductionmentioning

confidence: 99%

A nicotinamide adenine dinucleotide (phosphate) glycohydrolase [NAD(P)ase, EC 3.2.2.6] fromStreptomyces griseus

Bröker

Schindelmeiser

Pape

1979

FEMS Microbiology Letters

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“…Other reagents which have been utilized successfully are alizarin red S (2), naphthazarin (3), quinalizarin (4), quercetin (5), carmine red (6), carminic acid (7), Erichrome Black T (S), and , -arsonic acid (9). The most sensitive chemical procedure currently available appears to be the spectrophotometric method using morin (10), which is capable of determining about 0.2 pg of thorium in a 50-ml volume using 5-cm cells.…”

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confidence: 99%

Spectrophotometric determination of thorium with molybdophosphoric acid

Madison¹,

Guyon²

1967

Anal. Chem.

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A sensitive, spectrophotometric technique for the determination of thorium has been developed. The method is based upon the reduction product of a presumed thorium molybdophosphoric acid heteropoly complex. The effects of variables on the colorforming reactions are described, along with the optimum conditions for the formation of the blue hue. The method Is sensitive for thorium In the range of 0.2 to 1000 pg and by proper choice of size of sample and cells the limits can be varied widely. The molar absorptivity was calculated to be 3.3 X 101 234 5678910.

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Alizarin-s, a reagent for thorium. a gravimetric, colorimetric, and spectrophotometric study

Cited by 35 publications

References 4 publications

Design of an optical sensor for the determination of cysteine based on the spectrophotometric method in a triacetylcellulose film: PC-ANN application

Design of an optical sensor for the determination of cysteine based on the spectrophotometric method in a triacetylcellulose film: PC-ANN application

A nicotinamide adenine dinucleotide (phosphate) glycohydrolase [NAD(P)ase, EC 3.2.2.6] fromStreptomyces griseus

Spectrophotometric determination of thorium with molybdophosphoric acid

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