Search Results - "Racheva, Petya V"

Mono- and Binuclear Complexes in a Centrifuge-Less Cloud-Point Extraction System for the Spectrophotometric Determination of Zinc(II) by Gavazov, Kiril B, Racheva, Petya V, Saravanska, Antoaneta D, Genc, Fatma, Delchev, Vassil B

“…The hydrophobic reagent 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR) was investigated as part of a cloud-point extraction (CPE) system for the…”
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Extractive Spectrophotometric Determination and Theoretical Investigations of Two New Vanadium(V) Complexes by Gavazov, Kiril B., Racheva, Petya V., Saravanska, Antoaneta D., Toncheva, Galya K., Delchev, Vasil B.

“…Two new vanadium (V) complexes involving 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR) and tetrazolium cation were studied. The following commercially available…”
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Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction-Spectrophotometric Determination of Cobalt by Gavazov, Kiril Blazhev, Racheva, Petya V, Milcheva, Nikolina P, Divarova, Vidka V, Kiradzhiyska, Denitsa Dimitrova, Genç, Fatma, Saravanska, Antoaneta D

“…The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H L) was studied as part of a system for the centrifuge-less cloud point extraction…”
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A centrifuge-less cloud point extraction-spectrophotometric determination of copper(II) using 6-hexyl-4-(2-thiazolylazo)resorcinol by Racheva, Petya V., Milcheva, Nikolina P., Genc, Fatma, Gavazov, Kiril B.

“…[Display omitted] •A new cloud point extraction-chromogenic system for Cu(II) was studied.•A novel commercially available hydrophobic thiazolylazo dye was…”
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Liquid-liquid extraction of ion-association complexes of cobalt(II)-4-(2-pyridylazo)resorcinol with ditetrazolium salts by Divarova Vidka V., Stojnova Kirila T., Racheva Petya V., Lekova Vanya D., Dimitrov Atanas N.

“…The formation and liquid-liquid extraction of ion-association complexes between Co(II)-4-(2-Pyridylazo)resorcinol (PAR) anionic chelates and cations of three…”
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Extraction of Gallium(III) with a New Azo Dye in The Presence or Absence of Xylometazoline Hydrochloride by Racheva, Petya V, Milcheva, Nikolina P, Saravanska, Antoaneta D, Gavazov, Kiril B

“…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…”
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Ternary ion-association complexes of cobalt with 4-(2-pyridylazo)resorcinol and tetrazolium salts by Divarova, Vidka V, Lekova, Vanya D, Racheva, Petya V, Stojnova, Kirila T, Dimitrov, Kirila N

“…The formation of ternary ion-association complexes of Co(II) with 4-(2-pyridylazo)resorcinol (PAR) and tetrazolium salts (TS) -…”
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An environmentally friendly cloud point extraction–spectrophotometric determination of trace vanadium using a novel reagent by Milcheva, Nikolina P., Genç, Fatma, Racheva, Petya V., Delchev, Vassil B., Andruch, Vasil, Gavazov, Kiril B.

“…•A CPE-chromogenic system for total vanadium determination was studied.•The system involves a novel commercially available reagent, HTAR.•HTAR was investigated…”
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Complex formation and liquid–liquid extraction of anionic chelate of cobalt(II)-4-(2-thiazolylazo)resorcinol with 1,4-diphenyl-3-(phenylamino)-1H-1,2,4-triazole by Stojnova, Kirila T., Divarova, Vidka V., Racheva, Petya V., Daskalov, Georgi D., Lekova, Vanya D.

“…The complex formation of anionic chelate of Co(II)–4-(2-thiazolylazo)resorcinol (TAR) with 1,4-diphenyl-3-(phenylamino)-1 H -1,2,4-triazole (Nitron, Nt) in the…”
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