Výsledky vyhledávání - "Olha Korkuna"

Akademický článek

Development and Validation of the Simple and Sensitive Spectrophotometric Method of Amoxicillin Determination in Tablets using Sulphanilamides

Autor: Oksana Kostiv, Olha Korkuna, Petro Rydchuk

Publikováno v: Acta Chimica Slovenica, Vol 67, Iss 1, Pp 23-35 (2020)

A rapid, simple and sensitive spectrophotometric method for the determination of amoxicillin (AM) is described. The method is based on the previous sulphanilamide (SA) and sulphathiazole (STZ) diazotization in the medium of 0.6–0.7 M hydrochloric a

Externí odkaz: https://doaj.org/article/1d0bd541b75d47a3b6851cb8a86d0ce7

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Akademický článek

Ion-pair complexes formation between fluoroquinolone antibiotics and methyl red and their use for the extraction-spectrophotometric analysis

Autor: Olha Korkuna, Tetyana Zhak, Maria Smolinska

Publikováno v: Adsorption Science & Technology, Vol 35 (2017)

The new spectrophotometric methods of fluoroquinolones: enrofloxacin, norfloxacin, and ofloxacin determination with the methyl red are based on ion-pair complex formation between fluoroquinolones and methyl red in acidic medium at pH 3–4 and subseq

Externí odkaz: https://doaj.org/article/b85285c30ea1404b97304fa4830eff00

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Development and Validation of the Simple and Sensitive Spectrophotometric Method of Amoxicillin Determination in Tablets using Sulphanilamides

Autor: Petro Rydchuk, Olha Korkuna, Đžksana Kostiv

Publikováno v: Acta Chimica Slovenica, Vol 67, Iss 1, Pp 23-35 (2020)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a0070c4bdbf1a323bacdbaa29a58c85
https://doi.org/10.17344/acsi.2019.5041

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Osmium assay in fixatives and stained rat tissues by means of acid and o,o′-dihydroxo substituted monoazo dyes and some flavonoids

Autor: Mariana Rydchuk, Teodoziya Vrublevska, Olha Korkuna, Olga P. Dobryanska, Galyna Mykhalyna

Publikováno v: Open Chemistry, Vol 9, Iss 5, Pp 886-895 (2011)

New simple, rapid and accurate spectrophotometric techniques for osmium assays in fixatives and stained tissues have been elaborated using acid (Tropaeolin O, Tropaeolin OOO-I, Tropaeolin OOO-II, Orange G), o,o′-dihydroxo substituted azo dyes (Erio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::045b561195e94f07cc53bb198df778a6
https://doi.org/10.2478/s11532-011-0070-2

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Masking is the Effective Alternative to the Separation during Osmium Determination by Means of Azo Dyes in Complex Samples

Autor: Mariana Rydchuk, Teodoziya Vrublevska, Mariya Boyko, Olha Korkuna

Publikováno v: Chemistry and Chemical Technology. 4:115-124

The selectivity of the spectrophotometric methods for determination of microgram quantities of osmium (IV) with acidic monoazo dyes Tropaeolin O (TpO) and Tropaeolin OOO-I (TpOOOI) in the presence of concomitant metals, particularly platinum group, h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::746a52a6d6901270558af9432c9d1fd5
https://doi.org/10.23939/chcht04.02.115

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Development and validation of the simple and sensitive spectrophotometric method of sulphanilamides determination with 4-(2-thiazolylazo)-resorcinol in veterinary preparations

Autor: Grigory Teslyar, Maria Smolinska, Olha Korkuna, Teodoziya Vrublevska, Petro Rudchuk

Publikováno v: Open Chemistry, Vol 13, Iss 1 (2015)

New simple, rapid, and accurate spectrophotometric techniques for sulphanilamides assay in combination drugs have been elaborated. The method is based on the formation of coloured products of sulphanilamides diazonium salt azoсoupling with heterocyc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9cbf241de58c99b3f043aaa4ac6f791
https://doaj.org/article/19c239d4b8dd4096ae462469ae07fa58

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Structural and physicochemical properties of natural zeolites: clinoptilolite and mordenite

Autor: Janusz Ryczkowski, Vladimir M. Gun’ko, Roman Leboda, Olha Korkuna, J. Skubiszewska-Zie¸ba, Teodoziya Vrublevska

Publikováno v: Microporous and Mesoporous Materials. 87:243-254

Natural, H-form and Pd-containing clinoptilolite and mordenite were characterized using adsorption, AFM, FTIR, and TG–DTA methods. The initial natural adsorbents have small specific surface area which increases significantly after their modificatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84489c5ade6151493ed4a6f2a8b4ad0d
https://doi.org/10.1016/j.micromeso.2005.08.002

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Application of sulphanilamides disazo dyes with Tropaeolin O for simple, rapid and sensitive spectrophotometric assay of medicines

Autor: Grigory Teslyar, Teodoziya Vrublevska, Olha Korkuna, Maria Boiko

Publikováno v: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 79(2)

A rapid, simple and sensitive spectrophotometric method for the determination of some sulphanilamides is described. The method is based on the formation of blue coloured disazo dyes by the diazotization of sulphonamides viz. sulphanilamide (SA), sulp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9aff7d30f00a55c371f17cb65bbe72c4
https://pubmed.ncbi.nlm.nih.gov/21459663

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