Publications by authors named "Nikolina Milcheva"

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Ionic Liquid-Based Centrifuge-Less Cloud Point Extraction of a Copper(II)-4-Nitrocatechol Complex and Its Analytical Application.
Denitsa Kiradzhiyska, Nikolina Milcheva, Miglena Ruzmanova, Fatma Genç, Petya Racheva

Molecules· August 2025

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A Semi-Micro Extraction Spectrophotometric Determination of Iron Using 4-Nitrocatechol and Xylometazoline Hydrochloride.
Petya V Racheva, Antoaneta D Saravanska, Galya K Toncheva, Denitsa D Kiradzhiyska, Nikolina P Milcheva

Molecules· February 2025

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Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction-Spectrophotometric Determination of Cobalt.
Kiril Blazhev Gavazov, Petya V Racheva, Nikolina P Milcheva, Vidka V Divarova, Denitsa Dimitrova Kiradzhiyska

Molecules· July 2022

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Spectrophotometric Determination of Molybdenum(VI) as a Ternary Complex with 4-Nitrocatechol and Benzalkonium Chloride.
Vidka V Divarova, Antoaneta Saravanska, Galya Toncheva, Nikolina Milcheva, Vassil B Delchev

Molecules· February 2022

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A centrifuge-less cloud point extraction-spectrophotometric determination of copper(II) using 6-hexyl-4-(2-thiazolylazo)resorcinol.
Petya V Racheva, Nikolina P Milcheva, Fatma Genc, Kiril B Gavazov

Spectrochim Acta A Mol Biomol Spectrosc· December 2021

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Extraction-Chromogenic System for Nickel(II) Based on 5-methyl-4-(2-thiazolylazo)resorcinol and Aliquat 336.
Galya Konstantinova Toncheva, Danail Georgiev Hristov, Nikolina Petkova Milcheva, Kiril Blazhev Gavazov

Acta Chim Slov· March 2020

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Extraction-Chromogenic Systems for Vanadium(V) Based on Azo Dyes and Xylometazoline Hydrochloride.
Danail Georgiev Hristov, Nikolina Petkova Milcheva, Kiril Blazhev Gavazov

Acta Chim Slov· December 2019

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Liquid-Liquid Extraction-Chromogenic System for Vanadium(V) Based on 4-(2-thiazolylazo)orcinol (TAO) and Aliquat 336.
Galya K Toncheva, Nikolina P Milcheva, Kiril Blazhev Gavazov

Acta Chim Slov· December 2018

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