Zobrazeno 1 - 10 of 18 pro vyhledávání: '"Petya Racheva"'
1
Akademický článek
Study on the Complex Formation and the Ion-Association of Anionic Chelate of Molybdenum(VI) with Bidentate Ligand and the Cation of 2,3,5-Triphenyl-2Н-tetrazolium chloride
Autor: Vanya Lekova, Kirila Stojnova, Petya Racheva, Vidka Divarova, Pavel Yanev
Publikováno v: Acta Chimica Slovenica, Vol 67, Iss 2, Pp 594-601 (2020)
The complex formation between the anionic chelate of molybdenum(VI) with the bidentate ligand of 3,5-dinitrocatechol (3,5-DNC) and its ion-association with the cation of 2,3,5-triphenyl-2Н-tetrazolium chloride (TTC) in the liquid-liquid extraction s
Externí odkaz: https://doaj.org/article/438a3c47fd4447839c9723178e243351
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2
Akademický článek
Study on the Chelate Formation and the Ion-association of Anionic Chelate of Molybdenum(VI) with 3,5-Dinitrocatechol and Monotetrazolium Cation
Autor: Kirila Stojnova, Vidka Divarova, Petya Racheva, Kristina Bozhinova, Vanya Lekova
Publikováno v: Acta Chimica Slovenica, Vol 65, Iss 1, Pp 213-220 (2018)
The equilibria of the chelate formation and ion-association in the liquid-liquid extraction system Mo(VI)‒3,5-DNC‒INT‒H2O‒CHCl3 were studied by spectrophotometry. The optimum conditions for the chelate formation and extraction of the ion-asso
Externí odkaz: https://doaj.org/article/ae1aa8ce1a024190ad3367f0f3891c6c
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3
Akademický článek
Study on the Equilibria of the Complex Formation of the Ion-pair of Germanium(IV) with 4-Nitrocatechol and 1,4-Diphenyl-3-(phenylamino)-1H-1,2,4-triazole
Autor: Petya Racheva, Kirila Stojnova, Vidka Divarova, Vanya Lekova
Publikováno v: Acta Chimica Slovenica, Vol 64, Iss 2, Pp 365-372 (2017)
The complex formation of the ion-pair formed between the anionic chelate of Ge(IV)‒4-nitrocatechol (4-NC) and the cation of 1,4-diphenyl-3-(phenylamino)-1H-1,2,4-triazole (Nitron, Nt) in the liquid-liquid extraction system Ge(IV)‒4-NC‒Nt‒H2O
Externí odkaz: https://doaj.org/article/7a4a01f3c35d44caa723f9ea31dd31dc
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4
Akademický článek
Study on the Complex Equilibria of Molybdenum(VI) with 3,5-Dinitrocatehol and Ditetrazolium Salt
Autor: Kirila Stojnova, Petya Racheva, Vidka Divarova, Kristina Bozhinova, Vanya Lekova
Publikováno v: Acta Chimica Slovenica, Vol 63, Iss 3, Pp 654-660 (2016)
The complex formed between an anionic chelate of Mo(VI)‒3,5-dinitrocatechol (3,5-DNC) with the cation of 3,3ʹ-(3,3ʹ-dimethoxy-4,4ʹ-biphenylene)bis(2,5-diphenyl-2H-tetrazolium chloride) (Blue Tetrazolium Chloride, BTC) in the liquid-liquid extrac
Externí odkaz: https://doaj.org/article/effe186ca02c4b708eba0595f9b49016
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6
Study on the Complex Formation and the Ion-Association of Anionic Chelate of Molybdenum(VI) with Bidentate Ligand and the Cation of 2,3,5-Triphenyl-2Н-tetrazolium chloride
Autor: Pavel Yanev, Petya Racheva, Kirila Stojnova, Vanya Lekova, Vidka Divarova
Publikováno v: Acta Chimica Slovenica, Vol 67, Iss 2, Pp 594-601 (2020)
The complex formation between the anionic chelate of molybdenum(VI) with the bidentate ligand of 3,5-dinitrocatechol (3,5-DNC) and its ion-association with the cation of 2,3,5-triphenyl-2 Н -tetrazolium chloride (TTC) in the liquid-liquid extraction
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::057d07b2ca80edd97340212bcc9e063c
https://journals.matheo.si/index.php/ACSi/article/view/5612
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8
Study on the Complex Formation and the Ion-Association of Anionic Chelate of Molybdenum(VI) with Bidentate Ligand and the Cation of 2,3,5-Triphenyl-2?-tetrazolium Chloride
Autor: Kirila, Stojnova, Petya, Racheva, Vidka, Divarova, Pavel, Yanev, Vanya, Lekova
Publikováno v: Acta chimica Slovenica. 67(2)
The complex formation between the anionic chelate of molybdenum(VI) with the bidentate ligand of 3,5-dinitrocatechol (3,5-DNC) and its ion-association with the cation of 2,3,5-triphenyl-2?-tetrazolium chloride (TTC) in the liquid-liquid extraction sy
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::bf89551c838b74557b592e10d83a617e
https://pubmed.ncbi.nlm.nih.gov/33855575
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9
Extraction of Gallium(III) with a New Azo Dye in The Presence or Absence of Xylometazoline Hydrochloride
Autor: Antoaneta D. Saravanska, Kiril B. Gavazov, Nikolina P. Milcheva, Petya Racheva
Publikováno v: Croatica Chemica Acta
Volume 93
Issue 3
Complex formation between Ga(III) and 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H2L) was studied in a water-chloroform medium, in the presence or absence of xylometazoline hydrochloride (XMH). Optimum conditions for the extraction of Ga(III) were f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ae989415bcabae2c1ff7c1b9bfb2221
https://hrcak.srce.hr/253273
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10
A centrifuge-less cloud point extraction-spectrophotometric determination of copper(II) using 6-hexyl-4-(2-thiazolylazo)resorcinol
Autor: Kiril B. Gavazov, Petya Racheva, Fatma Neval Genç, Nikolina P. Milcheva
Publikováno v: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 262:120106
A simple, cheap, and environmentally friendly centrifuge-less cloud point extraction procedure was developed for the preconcentration of traces of Cu(II) before its spectrophotometric determination. It is based on a complexation reaction with the hyd
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3436b3aa933233ec0263ede40381824
https://doi.org/10.1016/j.saa.2021.120106
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