Zobrazeno 1 - 7
of 7
pro vyhledávání: '"G. K. Toncheva"'
Autor:
G. K. Toncheva, K. B. Gavazov, Z. G. Georgieva, L. K. Dospatliev, A. B. Peltekov, B. S. Boyanov
Publikováno v:
Bulletin of the Chemical Society of Ethiopia, Vol 30, Iss 3, Pp 325-332 (2017)
Optimum conditions for flotation-spectrophotometric determination of iron with 4-(2-pyridylazo)resorcinol (PAR) based on a 1:2 FeII-PAR complex were found to be as follows: flotation solvent (chloroform), shaking time (2 min), pH (4.5±0.5), concentr
Externí odkaz:
https://doaj.org/article/8559b10e53ef483daa5595c88fcc4f0a
Autor:
A. D. Saravanska, P. V. Racheva, V. V. Divarova, G. K. Toncheva, N. P. Milcheva, V. B. Delchev, K. B. Gavazov
Publikováno v:
Russian Journal of Inorganic Chemistry. 66:1880-1886
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d7f711b987b752f1df940ba8f32f850
https://doi.org/10.1134/s0036023621120147
https://doi.org/10.1134/s0036023621120147
Publikováno v:
Acta Chimica Slovenica, Vol 68, Iss 1, Pp 37-43 (2021)
The interaction between CoII and 5-methyl-4-(2-thiazolylazo)-resorcinol (MTAR) was studied in a water-chloroform system, in the presence or absence of benzalkonium chloride (BZC) as a cationic ion-association reagent. The optimum pH, concentration of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c0846dc50a0624c5a6315bcbc200f9f
https://journals.matheo.si/index.php/ACSi/article/view/6035
https://journals.matheo.si/index.php/ACSi/article/view/6035
Publikováno v:
Acta Chimica Slovenica, Vol 67, Iss 1, Pp 151-158 (2020)
A water-isobutanol extraction-chromogenic system for Ni II , based on the azo dye 5-methyl-4-(2-thiazolylazo)resorcinol (MTAR; H 2 L) and the ionic liquid Aliquat 336 (A336), was studied. Under the optimal conditions ( c MTAR = 2.0 × 10 –4 mol dm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84a1c1f62870ae0438338422b7be415f
https://doi.org/10.17344/acsi.2019.5299
https://doi.org/10.17344/acsi.2019.5299
Publikováno v:
Russian Journal of General Chemistry. 86:1167-1176
A liquid-liquid extraction-chromogenic system containing Fe(III), 4-(2-thiazolylazo)resorcinol (TAR), [3,3’-(3,3’-dimetoxy-4,4’-biphenylene)bis[2,5-di(4-nitrophenyl)-2H-tetrazolium] chloride (tetranitro-tetrazolium blue chloride, TNBT), water,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::430e9ac6d2cf8a6d1eab11a1eee21c5f
https://doi.org/10.1134/s1070363216050315
https://doi.org/10.1134/s1070363216050315
Publikováno v:
Russian Journal of General Chemistry. 85:1945-1951
The complex formation and solvent extraction were studied in a system containing iron(II), 4- nitrocatechol (4NC), 2,3,5-triphenyl-2H-tetrazolium chloride (TTC), water, and chloroform. Under the optimum conditions, the extracted complex has a composi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bf367b7075e0bd9d0150445d962c726
https://doi.org/10.1134/s1070363215080241
https://doi.org/10.1134/s1070363215080241
Autor:
Kiril B. Gavazov, G. K. Toncheva, B. Boyanov, A. B. Peltekov, Lilko Dospatliev, Z. G. Georgieva
Publikováno v:
Bulletin of the Chemical Society of Ethiopia; Vol 30, No 3 (2016); 325-332
Bulletin of the Chemical Society of Ethiopia, Vol 30, Iss 3, Pp 325-332 (2017)
Bulletin of the Chemical Society of Ethiopia, Vol 30, Iss 3, Pp 325-332 (2017)
Optimum conditions for flotation-spectrophotometric determination of iron with 4-(2-pyridylazo)resorcinol (PAR) based on a 1:2 Fe II -PAR complex were found to be as follows: flotation solvent (chloroform), shaking time (2 min), pH (4.5±0.5), concen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90ec934575203b1b57a47b4de826bcba
https://doi.org/10.4314/bcse.v30i3.1
https://doi.org/10.4314/bcse.v30i3.1