Search Results - "Vishnikin, Andriy"

Determination of Rhodamine 6G with direct immersion single-drop microextraction combined with an optical probe by Skok, Arina, Vishnikin, Andriy, Bazel, Yaroslav, Toth, Ján

“…The combination of an optical probe and single-drop direct immersion microextraction (DI-SDME-OP) was used for the preconcentration and subsequent…”
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Using an Optical Probe as the Microdrop Holder in Headspace Single Drop Microextraction: Determination of Sulfite in Food Samples by Zaruba, Serhii, Vishnikin, Andriy B, Škrlíková, Jana, Andruch, Vasil

“…A novel headspace single-drop microextraction method (HS-SDME) for determination of sulfite in the form of sulfur dioxide was developed. An optical probe was…”
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A novel vortex-assisted liquid–liquid microextraction approach using auxiliary solvent: Determination of iodide in mineral water samples by Zaruba, Serhii, Vishnikin, Andriy B., Andruch, Vasil

“…A novel vortex-assisted liquid–liquid microextraction (VA-LLME) for determination of iodide was developed. The method includes the oxidation of iodide with…”
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A new miniaturized microextraction HS-LPME-OIP procedure for ammonium determination based on Nessler's method by Skok, Arina, Bazel, Yaroslav, Vishnikin, Andriy

“…A recently proposed combination of headspace liquid-phase microextraction with an optical immersion probe (HS-LPME-OIP) was adapted for the spectrophotometric…”
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A Novel Solvent Microextraction Lab-in-Syringe System Coupled with Atomic Absorption Spectrometry for Thallium Determination in Water Samples by Skok, Arina, Manousi, Natalia, Bazel, Yaroslav, Vishnikin, Andriy, Anthemidis, Aristidis

“…Thallium is an accumulative highly toxic metal, that can be present in environmental samples due to industrial pollution and is dangerous for living organisms…”
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A two-in-one device for online monitoring of direct immersion single-drop microextraction: an optical probe as both microdrop holder and measuring cell by Zaruba, Serhii, Vishnikin, Andriy B., Škrlíková, Jana, Diuzheva, Alina, Ozimaničová, Ivana, Gavazov, Kiril, Andruch, Vasil

“…For the first time an optical probe is proposed as the microdrop holder and simultaneously the measuring cell in a direct immersion single-drop microextraction…”
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Stepwise injection spectrophotometric determination of epinephrine by Bulatov, Andrey V., Petrova, Anastasiia V., Vishnikin, Andriy B., Moskvin, Aleksey L., Moskvin, Leonid N.

“…Simple, rapid and fully automated methods for the manual and automated spectrophotometric determination of epinephrine have been developed by using schemes of…”
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Speciation of chromium through aqueous two-phase extraction of complexes of Cr(III) with 4-(2-pyridylazo)resorcinol and Cr(VI) with 1,5-diphenylcarbazide by Simonova Tamara N., Dubrovina Valentina A., Vishnikin Andriy B.

“…A green, sensitive and selective methods are described for the preconcentration and speciation of chromium species in natural waters. The developed methods are…”
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Simultaneous determination of rutin and ascorbic acid in a sequential injection lab-at-valve system by Al-Shwaiyat, Mohammed khair E.A., Miekh, Yuliia V., Denisenko, Tatyana A., Vishnikin, Andriy B., Andruch, Vasil, Bazel, Yaroslav R.

“…[Display omitted] •Simultaneous determination of two reducing agents in pharmaceuticals.•Improvement of precision and sensitivity in a sequential injection…”
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A highly selective and sensitive colorimetric chemosensor based on polyurethane foam impregnated with 3-methyl-2, 6-dimercapto-1,4-thiopyrone for on-site preconcentration and determination of palladium(II) by Khudyakova, Svetlana N., Vishnikin, Andriy B., Smityuk, Nataliya M.

“…A new sorbent and chemosensor for highly selective and sensitive on-site preconcentration and colorimetric determination of Pd(II) was developed based on its…”
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Highly sensitive sequential injection determination of p-aminophenol in paracetamol formulations with 18-molybdodiphosphate heteropoly anion based on elimination of Schlieren effect by Vishnikin, Andriy B., Al-Shwaiyat, Mohammed K.E.A., Petrushina, Galina A., Tsiganok, Ludmila P., Andruch, Vasil, Bazel, Yaroslav R., Sklenářová, Hana, Solich, Petr

“…► Determination of p-aminophenol with 18-molybdodiphosphate by SIA method. ► A new strategy has been proposed to reduce the Schlieren effect. ► Careful…”
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11-Molybdobismuthophosphate—A new reagent for the determination of ascorbic acid in batch and sequential injection systems by Vishnikin, Andriy B., Svinarenko, Tatyana Ye, Sklenářová, Hana, Solich, Petr, Bazel, Yaroslav R., Andruch, Vasil

“…The guanidinium salt of the new heteropolymolybdate 11-molybdobismuthophosphate Gua 6PBiMo 11O 40 (11-MBP) was synthesized, characterized and used as a reagent…”
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Determination of Ascorbic Acid with Wells-Dawson Type Molybdophosphate in Sequential Injection System by Vishnikin, Andriy B., Sklenářová, Hana, Solich, Petr, Petrushina, Galina A., Tsiganok, Ludmila P.

“…Two-electron reduced heteropolyblue is formed very fast at pH 3.75-4.75 in the reaction between Dawson-type molybdophosphate HPA and ascorbic acid (AsA) (ϵ 814…”
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Stepwise injection spectrophotometric determination of cysteine in biologically active supplements and fodders by Bulatov, Andrey V., Petrova, Anastasiia V., Vishnikin, Andriy B., Moskvin, Leonid N.

“…A stepwise injection analysis system was developed to monitor the concentration of l-cysteine in biologically active supplements (BAS) and fodders. It is based…”
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Sequential injection determination of orthophosphate as ion associate of 12-molybdophosphate with Astra Phloxine by Khlyntseva, Svitlana V., Vishnikin, Andriy B., Al-Shwaiyat, Mohammed K.E.A., Sklenářová, Hana, Solich, Petr, Bazel, Yaroslav R., Andruch, Vasil

“…A simple and fast reaction between 12-molybdophosphate heteropoly anion and the polymethine dye Astra Phloxine was used for the development of a new SIA method…”
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Rapid, sensitive and selective spectrophotometric determination of phosphate as an ion associate of 12-molybdophosphate with Astra Phloxine by VISHNIKIN, Andriy B, AL-SHWAIYAT, Mohammed Khair E. A, BAZEL, Yaroslav R, ANDRUCH, Vasil

“…A highly sensitive and selective reaction of 12-molybdophosphate with the polymethine dye Astra Phloxine has been used for the spectrophotometric determination…”
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In-vessel headspace liquid-phase microextraction by Tamen, Aimad-Eddine, Vishnikin, Andriy

“…A new mode of headspace liquid-phase microextraction termed in-vessel headspace liquid-phase microextraction (IV-HS-LPME) has been developed. A plastic vessel…”
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Online determination of sulfide using an optical immersion probe combined with headspace liquid-phase microextraction by Skok, Arina, Vishnikin, Andriy, Bazel, Yaroslav

“…A new design for headspace liquid phase microextraction in combination with an optical immersion probe (HS-LPME-OIP) was proposed and successfully tested for…”
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A non-extraction sequential injection method for determination of loratadine using formation of its ion-association complex with bromocresol purple in acetonitrile by Al-Shwaiyat, Mohammed, Vishnikin, Andriy, Kharadzha, Anastasii, Bazel, Yaroslav

“…The formation of an ion-association complex (IA) between sulfonephthalein dye and basic nitrogen-containing compound in an organic solvent medium has been for…”
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Direct immersion single-drop microextraction combined with fluorescence detection using an optical probe. Application for highly sensitive determination of rhodamine 6G by Skok, Arina, Bazel, Yaroslav, Vishnikin, Andriy, Toth, Ján

“…The use of an optical probe for fluorescence detection combined with direct immersion single-drop microextraction has been demonstrated as an innovative…”
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