A high-selectivity spectrophotometric reagent for determining platinum(IV)

Ma, Dawei; Li, Ying; Ma, Kuangbiao; Li, Jianping; Chen, Jianguo; Yan, Jiangli; Wang, Yulu

doi:10.1016/s0039-9140(00)00583-x

Cited by 18 publications

(5 citation statements)

References 3 publications

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“…The tolerable limit was defined as the content of the substance that gave a relative error of not more than ±5%. The maximum amounts of the substances (fold) were permitted as follows: K + , chloride (50) (20); D,L-lysine (3). It can be seen that the coexisting fold of some substances was very small, namely, they influenced the determination of HSA.…”

Section: Influence Of Coexisting Substances On the Determination Of Hsamentioning

confidence: 99%

Binding of Human Serum Albumin to N-(p-Ethoxy-phenyl)-N′-(1-naphthyl)thiourea and Synchronous Fluorescence Determination of Human Serum Albumin

et al. 2007

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The binding of N- (p-ethoxy-phenyl)-N′-(1-naphthyl)thiourea (EPNT) to human serum albumin (HSA) was investigated under simulative physiological conditions by fluorescence spectra in combination with UV absorption spectroscopy and a molecular modeling method. A strong fluorescence quenching reaction of EPNT to HSA was observed, and the quenching mechanism was suggested to be static quenching according to the Stern-Volmer equation. The binding constants (K) at different temperatures as well as thermodynamic parameters, enthalpy change (ΔH) and entropy change (ΔS), were calculated according to relevant fluorescent data and the vant' Hoff equation. This indicated that a hydrophobic interaction was a predominant intermolecular force for stabilizing the complex, which is in agreement with the results of molecule modeling study. The effects of energy transfer and other ions on the binding constant were considered. In addition, synchronous fluorescence technology was successfully applied to the determination of HSA added into the EPNT solution.

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Section: Influence Of Coexisting Substances On the Determination Of Hsamentioning

confidence: 99%

Binding of Human Serum Albumin to N-(p-Ethoxy-phenyl)-N′-(1-naphthyl)thiourea and Synchronous Fluorescence Determination of Human Serum Albumin

et al. 2007

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“…6 The use of thiohydrazides such as o-hydroxythiobenzhydrazide, 7 thiobenzhydrazide, 8 α-naphthalenethiocarboxhydrazide, 2-pyrrolthiocarboxhydrazide, furanthiocarboxhydrazide, thiophenethiocarboxhydrazide, 9 dibenzylidenethiocarbohydrazide, 10 and 2-furancarbothioic acid hydrazide 11 in the spectrophotometric determination of rhenium and platinum group metals has been described in a number of papers. Other reagents such as dithizone, 12 anisaldehyde-4-phenyl-3-thiosemicarbazone, 13 dithizone-polyurathane, 14 4-phenylthiosemicarbazide, 15 3-(2′-thiazolylazo)-2,6-diaminopyridine, 16 N-(m-methylphenyl)-N′-(sodium p-aminobenzenesulfonate)-thiourea, 17 piperonal thiosemicarbazone, 18 and leuco xylene cyanol FF, 19 have been reported for spectrophotometric determination of platinum after liquid-liquid extraction. The reagents phenanthrenequinone monoximes 20,21 and 1-(2-pyridylazo)-2-naphthol 22 have been used for spectrophotometric determination of platinum after solid-liquid extraction.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Determination of Traces of Platinum with 5-Chloro-2-hydroxythiobenzhydrazide after Extraction into Molten Naphthalene

Sawant

2010

ANAL. SCI.

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Platinum(IV) can be determined spectrophotometrically with 5-chloro-2-hydroxythiobenzhydrazide on extraction into molten naphthalene from the aqueous phase with pH 2.2 -6.0. Beer's law is obeyed in the concentration range 1.0 -7.0 μg cm -2 of Pt(IV) in 4-methyl-2-pentanone solution at 680 nm. The molar absorptivity and Sandell sensitivity are found to be 2.40 × 10 4 L mol -1 cm -1 and 8.0 ng cm -2 , respectively. Six replicate analyses of a solution containing 40.0 μg of Pt(IV) gave a mean absorbance of 0.505 with a standard deviation of 0.0065 and a coefficient of variation of 1.30%. The complex is stable for more than 48 h. The metal to ligand ratio in the complex is determined to be 1:1. Interference from various ions is studied and the method is found to be selective for platinum. Platinum is determined in various synthetic mixtures and in some alloy samples. The method permits the sequential separation and determination of different amounts of platinum and rhenium from their mixtures.

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“…They exhibit various biological activities such as antiviral and antifungal, and can be used as insecticides, herbicides and plant-growth regulators. During the past few years, a series of saturated, unsaturated fatty hydrocarbon and aryl-substituted thiourea compounds were synthesized and widely used in analytical chemistry [1][2][3][4][5][6]. N-(4-ethoxyphenyl)-N 0 -(4-antipyrinyl) thiourea (EPAT, Fig.…”

Section: Introductionmentioning

confidence: 99%

Interaction of human serum albumin with N-(4-ethoxyphenyl)-N′-(4-antipyrinyl) thiourea using spectroscopies and molecular modeling method

Lü

Cui

Fan

et al. 2009

Journal of Luminescence

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A high-selectivity spectrophotometric reagent for determining platinum(IV)

Cited by 18 publications

References 3 publications

Binding of Human Serum Albumin to N-(p-Ethoxy-phenyl)-N′-(1-naphthyl)thiourea and Synchronous Fluorescence Determination of Human Serum Albumin

Binding of Human Serum Albumin to N-(p-Ethoxy-phenyl)-N′-(1-naphthyl)thiourea and Synchronous Fluorescence Determination of Human Serum Albumin

Spectrophotometric Determination of Traces of Platinum with 5-Chloro-2-hydroxythiobenzhydrazide after Extraction into Molten Naphthalene

Interaction of human serum albumin with N-(4-ethoxyphenyl)-N′-(4-antipyrinyl) thiourea using spectroscopies and molecular modeling method

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