
N. A. NikitinaV. N. Karazin Kharkiv National University · Department of Chemical Metrology
N. A. Nikitina
Doctor of Philosophy
About
8
Publications
4,838
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
84
Citations
Introduction
environmental analysis, express analysis, complex formation, apparent dissociation constant
Skills and Expertise
Publications
Publications (8)
Fixed on the transparent triacetate cellulose substrate of the commercial film, the solidified gelatin gel was used for the immobilization of acid-base and solvatochromic betaine dyes. The results of microscopic studies showed that while immobilizing the reagents, the structure and morphology of the gel don’t change. Indicators are distributed unif...
Potentiometry has been employed to determine the activity coefficients of n-decyl sulfate and n-alkyl(C5–C10)sulfonate ions in aqueous solutions of their sodium salts containing NaCl or Na2SO4 as a background electrolyte. The selectivity factors have been estimated for ion-selective electrodes exhibiting responses to surfactant ions in the presence...
Photometric determination of aqueous Co(II), Cu(II), Ni(II) and Fe(III) was performed using indicator films prepared by immobilization of 1-nitroso-2-naphthol-3,6-disulfonic acid disodium salt (NRS) into hardened photographic film. Immobilization was based on electrostatic interaction of reagent and metal complexes with the gelatin. The isoelectric...
The hardened gelatin film fixed on the transparent triacetylcellulose support can be utilized as a convenient carrier for acid-base indicator dyes. Bromophenol blue, bromocresol green, eosin, ethyleosin, n-decyleosin, n-decylfluorescein, neutral red, and malachite green were embedded into the gelatin films by extracting from aqueous media under app...
Colorimetry method was applied for estimation the precision of the measurement results of chromaticity characteristics of colored sorbates on paper, polyurethane foam and silica gel using a portable photometerreflectometer. The relative standard deviation of measurement results is not exceed 1.0%; the trueness and precision of results of determinat...
RIB-Nitrite-Test and Sorbfil-Nitrite-Test strips were developed for determining nitrite ions in water samples and foodstuffs
by a reaction similar to the Griess reaction. Stable and noncarcinogenic 3-hydroxy-7,8-benzo-1,2,3,4-tetrahydroquinoline was
used as an azo component adsorbed in the reagent paper zone on a polymeric support or on a Sorbfil p...
A statistical approach to evaluating the limit of detection (c
min) was used for studying 12 test systems with visual indication based on reagent indicator paper, polyurethane foam, gelatin
films, powdered methylsilicic acid, and reagent solutions. It was proposed to characterize the quality of test systems by
relative width of the region of an unr...
A test procedure is proposed for determining total metals (Cd, Co, Cu, Fe, Hg, Ni, and Zn) using irregular 1-(2-carboxyphenyl)-5-(4-methyl-6-methoxypyrimidine-2-yl)formazan-6-cellulose as an indicator paper. Regions of unreliable color reactions were determined for each of the metals and total metals present in equal concentrations. Statistical pro...