Croatica Chemica Acta, Vol. 88 No. 2, 2015.
Izvorni znanstveni članak
https://doi.org/10.5562/cca2434
Spectrophotometric Determination of Gallium(III) with 4-(2-Pyridylazo)-resorcinol and Nitron
Petya Vassileva Racheva
; Departament of Chemistry and Biochemistry, Medical University − Plovdiv, 15A Vassil Aprilov Blvd., 4002 Plovdiv, Bulgaria
Kirila Trifonova Stojnova
; Departament of General and Inorganic Chemistry, University of Plovdiv “Paisii Khilendarski”, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria
Vanya Dimitrova Lekova
; Departament of General and Inorganic Chemistry, University of Plovdiv “Paisii Khilendarski”, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria
Atanas Nikolov Dimitrov
; Departament of General and Inorganic Chemistry, University of Plovdiv “Paisii Khilendarski”, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria
Sažetak
The formation and liquid-liquid extraction of ion-association complex between gallium(III) − 4-(2-pyridylazo)-resorcinol (PAR) – 1,4-diphenyl-3-(phenylamino)-1H-1,2,4-triazole (nitron, Nt), water and chloroform were studied. The optimum conditions for gallium(III) extraction as an ion-association complex, (NtH)+[Ga3+(PAR)2]-, were found: pH, concentration of the reagents and shaking time. The
following key constants were calculated: constant of extraction (logKex = 6.28 ± 0.07), constant of association (logβ = 4.98 ± 0.05), constant of distribution (logKD = 1.30 ± 0.02) and recovery factor (R / % = 95.17 ± 0.02). Beerʼs law is obeyed for Ga(III) concentration up to 0.8 μg cm-3 with apparent molar
absorptivity of (10.3 ± 0.4)×104 dm-3 mol-1 cm-1 at λmax = 510 nm. Some additional characteristics, such as limit of detection (LOD = 0.072 μg cm-3), limit of quantification (LOQ = 0.24 μg cm-3) and Sandellʼs sensitivity (SS = 0.000675 ng cm-2) were estimated as well.
Ključne riječi
gallium; ternary complex; solvent extraction; spectrophotometry; nitron
Hrčak ID:
141988
URI
Datum izdavanja:
20.7.2015.
Posjeta: 1.925 *