Comparison of the reactions of ferric ions with Chromazurol S, Eriochromazurol B and Eriochromcyanine R in the presence of surface active substances and spectrophotometric determination of Fe(III)-ions with Chromazurol S-cetylpyridinium bromide system

1980 ◽  
Vol 45 (10) ◽  
pp. 2656-2669 ◽  
Author(s):  
Vlastimil Kubáň ◽  
Dagmar Gotzmannová
Keyword(s):  
Ferric Ions ◽  
Cetylpyridinium Bromide ◽  
Absorption Coefficients ◽  
Statistical Parameters ◽  
Spectrophotometric Methods ◽  
Chromazurol S ◽  
Surface Active ◽  
Active Substances ◽  
Serum Components

The spectrophotometric methods of determining Fe(III) ions with Chromazurol S, Eriochromazurol B and Eriochromcyanine R in the presence of cationic, anionic and nonionic tensides were compared using the basic optical and statistical parameters. A method was proposed and developed for the determination of Fe(III) ions using Chromazurol S in blood serum and plasma at pH 4.7-5.0 in a medium of 2 . 10-4M cetylpyridinium bromide and 0.1M pyridine buffer and at pH 6.0-6.5 in a medium of 2 . 10-3M cetylpyridinium bromide and 0.1M hexamethylenetetramine buffer with molar absorption coefficients of 1.31 . 105 and 1.40 . 105, respectively. The determination is sufficiently specific even at pathological concentrations of the other serum components.

Modifications of spectrophotometric methods for total phosphorus determination in meat samples

2009 ◽  
Vol 63 (1) ◽  
Author(s):  
Aneta Jastrzębska
Keyword(s):  
Total Phosphorus ◽  
Reducing Agents ◽  
Statistical Parameters ◽  
Molybdenum Blue ◽  
Spectrophotometric Methods ◽  
Hydrazine Sulphate ◽  
Meat Samples ◽  
Blue Reaction ◽  
Better Than

AbstractSpectrophotometric determination of total phosphorus in meat samples was modified using the molybdenum blue reaction with the following reducing agents: ascorbic acid (AA), hydrazine sulphate (HS), and mixture of hydroquinone and hydrazine sulphate (HHS). Proposed methods were validated by evaluation of statistical parameters such as: linearity, sensitivity, limits of detection (DL) and quantification (QL), precision, and accuracy, against the standard and malachite green (MG) modified procedures and by applying food certified materials. The values of within-day and between-days precision in meat samples for all tested reducing agents were better than 3.4 % and 4.2 %, respectively. The recoveries for CRMs analyses were between 92 % and 102.3 %. Obtained results suggest usefulness of the hydroquinone and hydrazine sulphate mixture in the determination of phosphorus ions.

scholarly journals Synthesis of Clay Composites of Polyacrylamide and Poly-2-Hydroxyethylacrylate and Sorbtion Ability in the Case of Cetylpyridinium Bromide

2015 ◽  
Vol 16 (4) ◽  
Author(s):  
M M Beysebekov
Keyword(s):  
Ionic Strength ◽  
Hydrophobic Interactions ◽  
Aqueous Suspension ◽  
Bentonite Clay ◽  
Organic Polymer ◽  
Cetylpyridinium Bromide ◽  
Composite Gels ◽  
Environment Temperature ◽  
Surface Active ◽  
Active Substances

<p>By the three-dimensional polymerization of nonionic (polyhydroxyethylacrylate and polyacrylamide) <br />polymers and bentonite clay from Manyrak deposit (East Kazakhstan Region) and with using of process <br />preliminary intercalation of monomers in an aqueous suspension of bentonite (polymerization in situ) the <br />chemically crosslinked composite gels were synthesized. Optimal conditions of synthesis and physical-chemical properties of composition gels were established. It was shown, that yield of gel fraction increases <br />with increasing contents of bentonite clay. Insignificant adding of negative charged particles of bentonite clay <br />gives to polymer gels of nonionic type polyelectrolyte character, that comes out in decreasing of swelling <br />degree of gels under effect of ionic strength. By using physical and chemical methods of research: equilibrium <br />swelling, IR spectroscopy, scanning electron microscope (SEM), sorption-desorption, etc. were shown the <br />formation of compatible, homogeneous, swelling in water polyelectrolyte gels formed via hydrogen bonds <br />between the components of the gel, stabilized by hydrophobic interactions of the organic polymer chains. <br />The possibility of the regulation of swelling ability of the composite gels through varying of the outside and <br />inside factors as: consist of the composition, conditions of intercalation, pH of the environment, temperature <br />and ionic strength was established, that is stimulus sensitivity of gels. The sorbtion capacity of polymer-clay composites in attitude surface active substance cetylpyridinium bromide were estimated. Increasing of <br />temperature of environment and content of bentonite clay in composite promotes the process of sorbtion <br />of surface-active substances. Considerably high sorption capacity of polymer clay composition based on <br />more hydrophilic polymer – polyacrylamide was established. By the results of investigations one may, that <br />synthesized polymer clay composites after suitable investigations can be recommend as sorbents of cationic <br />surface active substances.</p>

Ion Pairs of 5,5-dimethyl-2-(2-hydroxy-3,5-disulfophenylhydrazo)cyclohexane-1,3-dione with Cationic Surface-Active Substances as Analytical Reagent for Determination of Copper(II)

2010 ◽  
Vol 43 (18) ◽  
pp. 2923-2938 ◽  
Author(s):  
Kamran T. Mahmudov ◽  
Abel M. Maharramov ◽  
Rafiga A. Aliyeva ◽  
Ismayil A. Aliyev ◽  
Maximilian N. Kopylovich ◽  
...  
Keyword(s):  
Ion Pairs ◽  
Surface Active ◽  
Analytical Reagent ◽  
Determination Of Copper ◽  
Active Substances

Spectrophotometric study of complexation equilibria and of a method for the determination of Fe(III) ions with 4-(2-pyridylazo)resorcinol and 4-(2-thiazolylazo)resorcinol

1979 ◽  
Vol 44 (2) ◽  
pp. 374-392 ◽  
Author(s):  
Ellena Russeva ◽  
Vlastimil Kubáň ◽  
Lumír Sommer
Keyword(s):  
Stability Constants ◽  
Spectrophotometric Determination ◽  
Equilibrium Constants ◽  
Spectrophotometric Study ◽  
Component Concentration ◽  
Optimum Conditions ◽  
Ferric Ions ◽  
Absorption Coefficients ◽  
Basic Parameters

The composition, molar absorption, coefficients, equilibrium constants and stability constants for the MLH, ML, M(LH)2 and ML2 complexes have been determined graphically using slope-intercept transformations and numerically from the absorbance-pH curves and from the absorbance dependence on the component concentration, using the PRCEK III and SPEKTFOT programs, or from the continuous variation plots using the JOBCON program. The optimum conditions were found for a spectrophotometric determination of ferric ions with TAR and PAR reagents in pure solutions. The basic parameters of the analytical curves were evaluated using the STAT program.

scholarly journals Polarographic investigations on the determination of surface active substances, on the mechanism of some indicators, and a method of Br-Ag+ titration using O2-maximum

1961 ◽  
Vol 10 (3) ◽  
pp. 284-290
Author(s):  
Hideo WATANABE ◽  
Saburô MIYAZAWA ◽  
Katsumi YAMAMOTO ◽  
Shin'ichiro HAKOMORI
Keyword(s):  
Surface Active ◽  
Active Substances
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