نتایج جستجو برای: permanganate determination

تعداد نتایج: 252339  

Journal: :Journal of research of the National Bureau of Standards 1949
H B KNOWLES G E F LUNDELL

The quantitative determination of columbium based on reduction by amalgamated zin c and reox idation with potassium permanganate has, in general, produced results that lack both accuracy and precision. A study of t he various factors involved indicates that essential conditions requ ire adequate duration of reduction in t he presence of an excess of zinc and a proper concentration of both acid ...

Journal: :Journal of the American Chemical Society 2006
Kenneth B Wiberg Yi-gui Wang Stepan Sklenak Carol Deutsch Gary Trucks

The permanganate oxidation of alkenes has been studied both experimentally and computationally. Transition state structures were located for the reaction of permanganate ion with a variety of monosubstituted alkenes at the B3LYP/6-311++G** level. Although the calculated activation energy for the reaction with ethene was reasonable, the calculated effect of substituents, based on the energies of...

1943
G. Panja S. K. Ghosh

Potassium permanganate pills were used by Rogers (1913) in cholera cases to neutralize the toxins of the cholera vibrio, and 'permanganate is commonly used to disinfect clothes, well water and tank water, cholera stools, etc., during an epidemic. Hands also are often washed with permanganate solutions after attending cholera cases. There are various old references to potassium permanganate in d...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Keiichi Fujimori Kenta Tsujimoto Takayo Moriuchi-Kawakami Yasuhiko Shibutani Masato Ueda Takahiko Suzue Hideshi Kimoto Kei Okamura

A new chemiluminescence method is proposed for the determination of sulfide in seawater based on the chemiluminescence reaction between sulfide and an acidic permanganate solution. 3-Cyclohexylaminopropanesulfonic acid was used as a chemiluminescence enhancer. By use of this method, 1-150 µM of sulfide could be determined in artificial seawater. The limit of detection was 0.17 µM sulfide. We in...

Journal: :Zeitschrift fur Lebensmittel-Untersuchung und -Forschung 1975
W F van Gils G Visser G G Hidskes

A method has been developed for the quantitative determination of traces of chloramine T (Activin, Halamid) in dairy products. Proteins are removed and the hydrolysis product toluene-4-sulphonamide is extracted with ether. After evaporation of the solvent, the residue is oxidized with an alkaline potassium permanganate solution. The oxidized product is isolated by ether extraction and the resid...

2013
M. Basiouny E. A. Fouad

The aim of the present research is studying the effect of potassium permanganate addition on the pre-oxidation and coagulation of the surface water. River Nile and El Rayah El Tawfeky of Benha city, Egypt were the surface water supply used in this research. The results showed that El Rayah El Tawfeky raw water had higher turbidity concentration and humic acids absorbance (8.5 NTU and 0.024, res...

Journal: :Clinical chemistry 1958
G B DOBKIN M D GLANTZ

HE STUDY OF CATALASE ACTIVITY has been the subject of much investigation and has necessitated the use of very elegant technics. Recently, methods have been introduced which simplified the technics for estimating catalase activity. Among these are the iodimetric titration procedure of Dille and Watkins (1), the use of sodium perborate as a source of hydrogen peroxide (2), and various methods uti...

Journal: :Analytical and bioanalytical chemistry 2008
Qin-Zhong Feng Li-Xia Zhao Wei Yan Feng Ji Yan-Lin Wei Jin-Ming Lin

Highly sensitive flow-injection chemiluminescence (CL) combined with molecularly imprinted solid-phase extraction (MISPE) has been used for determination of 2,4-dichlorophenol (2,4-DCP) in water samples. The molecularly imprinted polymer (MIP) for 2,4-DCP was prepared by non-covalent molecular imprinting methods, using 4-vinylpyridine (4-VP) and ethylene glycol dimethacrylate (EGDMA) as the mon...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2006
Z Pawlicová J R Albert-García I Sahuquillo Mateo J V García M Catalá Icardo J Martínez Calatayud

A new, robust and simple method is proposed for the chemiluminescent determination of the pesticide Bromoxynil. The empirical procedure is performed with the aid of a flow-injection manifold provided with an on-line photo-reactor to obtain chemiluminescent photofragments. After a period of 12 s of irradiation with an 8 W low-pressure mercury lamp, a chemiluminescent oxidation was performed with...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2015
Jafar Abolhasani Javad Hassanzadeh Ebrahim Ghorbani-Kalhor

A sensitive and selective chemiluminescence method was developed to determine ethylenediaminetetraacetic acid (EDTA) in water samples. It was observed that gold nanoparticles (AuNPs) catalyzed chemiluminescence (CL) reactions of permanganate-aldehydes which underwent an enhancement effect in the presence of iron(III) ions (Fe(3+)). This effect is more remarkable in the presence of EDTA, and a h...

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