scholarly journals Kinetic determination of gold (III) based on its inhibitory effect in oxidizing homogenous reaction system

2016 ◽  
Vol 6 (2) ◽  
pp. 11-16
Author(s):  
Ruzica Micic ◽  
Snezana Mitic ◽  
Ranko Simonovic ◽  
Dragana Sejmanovic
Keyword(s):  
Reaction System ◽  
Inhibitory Effect ◽  
Kinetic Determination

scholarly journals Analytical application of the reaction system phenyl fluorone-hydrogen peroxide for the kinetic determination of cobalt and tin traces by spectrophotometry in ammonia buffer media

2013 ◽  
Vol 67 (6) ◽  
pp. 989-997
Author(s):  
Sofija Rancic ◽  
Snezana Nikolic-Mandic ◽  
Aleksandar Bojic
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction System ◽  
Inhibitory Effect ◽  
New Method ◽  
Kinetic Determination ◽  
Spectrophotometric Methods ◽  
Kinetic Spectrophotometric ◽  
Comparison Of The Results ◽  
Oxidation By Hydrogen Peroxide

The present paper describes two new, simple, rapid, selective and sensitive kinetic spectrophotometric methods for Co(II) and Sn(II) determination in solution at room temperature, based on their effect on phenyl fluorone (PF) oxidation by hydrogen peroxide in ammonia buffer. The new method was elaborated for nano amounts of Co(II) determination, based on its catalytic effect on the oxidation of PF by H2O2 in the presence of citric acid (CA) as an activator. Also, the new method for micro amounts of Sn(II) determination was developed based on its inhibitory effect upon the same reaction. Comparison of the results showed that the activated catalytic reaction has better sensitivity than the inhibitory one. Methods were validated by the analyze of chemical substances and results were improved by examining the same samples by AAS method.

scholarly journals Kinetic determination of rutin

2001 ◽  
Vol 66 (3) ◽  
pp. 205-211
Author(s):  
S.S. Mitic ◽  
J.I. Vucetic ◽  
S.M. Miletic ◽  
D.A. Kostic
Keyword(s):  
Hydrogen Peroxide ◽  
Detection Limit ◽  
Relative Error ◽  
Reaction Rate ◽  
Kinetic Equations ◽  
Inhibitory Effect ◽  
Kinetic Determination ◽  
Hydrogen Peroxide Detection ◽  
Concentration Interval

Akinetic method is described for the determination of rutin based on its inhibitory effect on the Fe(II)-AA catalysis of the oxidation of C6H5COONa with hydrogen peroxide. Detection limit of this method is 0.16 ngcm-3. The relative error ranges between 0.9 to 9.8%for the concentration interval 0.82 ngcm-3 to 8.2 ngcm-3. Kinetic equations are proposed for the investigated process. The effects of certain foreign ions upon the reaction rate were determined for the assessment of the selectivity of the method.

Kinetic determination of morphine by means of Bray–Liebhafsky oscillatory reaction system using analyte pulse perturbation technique

2007 ◽  
Vol 582 (2) ◽  
pp. 367-374 ◽  
Author(s):  
Nataša D. Pejić ◽  
Slavica M. Blagojević ◽  
Slobodan R. Anić ◽  
Vladana B. Vukojević ◽  
Miroslav D. Mijatović ◽  
...  
Keyword(s):  
Perturbation Technique ◽  
Reaction System ◽  
Oscillatory Reaction ◽  
Kinetic Determination ◽  
Pulse Perturbation ◽  
Analyte Pulse Perturbation Technique

Kinetic determination of tellurium based on its inhibitory effect on the palladium(II)-catalysed reaction between pyronine G and hypophosphite ion

The Analyst ◽  
1990 ◽  
Vol 115 (9) ◽  
pp. 1257-1260 ◽  
Author(s):  
Concepcion Sánchez-Pedreño ◽  
Maria Isabel Albero ◽  
Maria Soledad García ◽  
Andres Saez
Keyword(s):  
Inhibitory Effect ◽  
Kinetic Determination ◽  
Catalysed Reaction

scholarly journals Thionine-Bromate as a New Reaction System for Kinetic Spectrophotometric Determination of Hydrazine in Cooling Tower Water Samples

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Masoud Reza Shishehbore ◽  
Ali Sheibani ◽  
Masoumeh Eslami
Keyword(s):  
Water Samples ◽  
Kinetic Method ◽  
Reaction System ◽  
Fixed Time ◽  
Inhibitory Effect ◽  
Optimum Conditions ◽  
Acid Media ◽  
Relative Standard ◽  
Kinetic Spectrophotometric

A simple, selective, and inexpensive kinetic method was developed for the determination of hydrazine based on its inhibitory effect on the thionine-bromate system in sulfuric acid media. The reaction was monitored spectrophotometrically at 601 nm by a fixed time method. The effect of different parameters such as concentration of reactants, ionic strength, temperature, and time on the rate of reaction was investigated, and the optimum conditions were obtained. Under optimum conditions, the calibration curve was linear in the concentration range from 0.8–23.0 μg mL−1of hydrazine, and the detection limit of the method was 0.22 μg mL−1. The relative standard deviation for five replicate determinations of 1.0 μg mL−1of hydrazine was 0.74%. The potential of interfering effect of foreign species on the hydrazine determination was studied. The proposed method was successfully applied for the determination of hydrazine in different water samples.

scholarly journals A modification of the kinetic determination of pancuronium bromide based on its inhibitory effect on cholinesterase

2007 ◽  
Vol 21 (2) ◽  
pp. 124-131 ◽  
Author(s):  
V.P. Stankov-Jovanovic ◽  
S.D. Nikolic-Mandic ◽  
Lj.M. Mandic ◽  
V.D. Mitic
Keyword(s):  
Inhibitory Effect ◽  
Pancuronium Bromide ◽  
Kinetic Determination

Kinetic determination of trace amounts of thiosulfate based on its inhibitory effect

2009 ◽  
Vol 6 (1) ◽  
pp. 121-128 ◽  
Author(s):  
R. K. Tiwari ◽  
R. M. Naik ◽  
P. K. Singh ◽  
S. B. S. Yadav ◽  
R. Rastogi ◽  
...  
Keyword(s):  
Inhibitory Effect ◽  
Kinetic Determination

scholarly journals A kinetic method for para-nitrophenol determination based on its inhibitory effect on the catalatic reaction of catalase

2005 ◽  
Vol 3 (4) ◽  
pp. 592-604 ◽  
Author(s):  
Claudia Mureşanu ◽  
Lucian Copolovici ◽  
Florina Pogącean
Keyword(s):  
Detection Limit ◽  
Phenolic Compounds ◽  
Catalytic Reaction ◽  
Initial Rate ◽  
Kinetic Method ◽  
Inhibitory Effect ◽  
Inhibition Mechanism ◽  
Kinetic Determination ◽  
Menten Kinetic

AbstractThe inhibitory effect of para-nitrophenol on the catalytic reaction of catalase was investigated. Michaelis-Menten kinetic parameters were determined from Lineweaver-Burk plots obtained in the absence or in the presence of the inhibitor. The inhibitor pattern, revealed by the Lineweaver-Burk plots, suggested a fully mixed inhibition mechanism. Spectrophotometric monitoring of the indicator reaction: $$H_2 O_2 \xrightarrow{{catalase,para - nitrophenol}}H_2 O + \tfrac{1}{2}O_2 $$ in conjunction with initial rate measurements was employed for the kinetic determination of the inhibitor. Calibration plots of initial rate vs. para-nitrophenol concentration were linear in the concentration range 0.9·10−5–2.5·10−5 mol/L and the detection limit was 3·10−6 mol/L (417 μg/L) para-nitrophenol. Interferences from other phenolic compounds like orto-cresole, meta-and orto-nitrophenol were observed.

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