TY  - JOUR
AU  - Milovanović, Gordana
AU  - Petronijević, Radivoj
AU  - Čakar, Mira
PY  - 1998
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/177
AB  - A kinetic method for the determination of selenium(IV) traces is proposed, based on its inhibitory action on the oxidation of Nile Blue A by hydrogen peroxide in phosphate buffer (pH 10.5). A linear dependence was established between the rate of the proposed indicator reaction and selenium concentration in the range 9.5 x 10(-2)-1.58 ng cm(-3). The experimental conditions of maximal selenium effect were established. Selenium, determined by the tangent method, was determined at concentrations over the range 0.22-1.26 ng cm(-3), with relative standard deviations up to 4.5%. The reaction rate was followed spectrophotometrically. The effect of foreign ions on the accuracy of this method was also investigated. The method was applied to the determination of selenium in pharmaceutical preparations and wheat flour.
PB  - Springer-Verlag Wien, Vienna
T2  - Mikrochimica Acta
T1  - Kinetic determination of trace levels of selenium(IV) and total selenium by Nile Blue A hydrogen peroxide method
VL  - 128
IS  - 1-2
SP  - 43
EP  - 48
DO  - 10.1007/BF01242188
ER  - 

@article{
author = "Milovanović, Gordana and Petronijević, Radivoj and Čakar, Mira",
year = "1998",
abstract = "A kinetic method for the determination of selenium(IV) traces is proposed, based on its inhibitory action on the oxidation of Nile Blue A by hydrogen peroxide in phosphate buffer (pH 10.5). A linear dependence was established between the rate of the proposed indicator reaction and selenium concentration in the range 9.5 x 10(-2)-1.58 ng cm(-3). The experimental conditions of maximal selenium effect were established. Selenium, determined by the tangent method, was determined at concentrations over the range 0.22-1.26 ng cm(-3), with relative standard deviations up to 4.5%. The reaction rate was followed spectrophotometrically. The effect of foreign ions on the accuracy of this method was also investigated. The method was applied to the determination of selenium in pharmaceutical preparations and wheat flour.",
publisher = "Springer-Verlag Wien, Vienna",
journal = "Mikrochimica Acta",
title = "Kinetic determination of trace levels of selenium(IV) and total selenium by Nile Blue A hydrogen peroxide method",
volume = "128",
number = "1-2",
pages = "43-48",
doi = "10.1007/BF01242188"
}

Milovanović, G., Petronijević, R.,& Čakar, M.. (1998). Kinetic determination of trace levels of selenium(IV) and total selenium by Nile Blue A hydrogen peroxide method. in Mikrochimica Acta
Springer-Verlag Wien, Vienna., 128(1-2), 43-48.
https://doi.org/10.1007/BF01242188

Milovanović G, Petronijević R, Čakar M. Kinetic determination of trace levels of selenium(IV) and total selenium by Nile Blue A hydrogen peroxide method. in Mikrochimica Acta. 1998;128(1-2):43-48.
doi:10.1007/BF01242188 .

Milovanović, Gordana, Petronijević, Radivoj, Čakar, Mira, "Kinetic determination of trace levels of selenium(IV) and total selenium by Nile Blue A hydrogen peroxide method" in Mikrochimica Acta, 128, no. 1-2 (1998):43-48,
https://doi.org/10.1007/BF01242188 . .

TY  - JOUR
AU  - Milovanović, G.A
AU  - Čakar, Mira
AU  - Petronijević, R.B
PY  - 1997
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/164
AB  - A kinetic method for the determination of selenium(IV) in ethanol solution is proposed. The method is based on the action of selenium(IV) upon the oxidation of Nile Blue A by hydrogen peroxide in the presence of phosphate buffer (pH 10.8). The reaction rate was followed spectrophotometrically at 637.5 nm. It was established that the action of selenium(IV) on the indicator reaction is maximal with a 0.25% ethanol solution. The kinetic expression for the reaction in the presence and absence of selenium(IV) are postulated. Optimal experimental conditions for the determination of selenium(IV) were established and selenium(IV) was determined in concentrations from 0.95×10 -2 to 12.6×10 -2 ng cm -3 , with a relative standard deviation of 5.2% A lower detection limit (1.6×10 -3 ng cm -3 ) and higher selectivity compared to the determination in aqueous solution are obtained. The method was applied for the determination of selenium(IV) in mineral water.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - A kinetic method for the determination of selenium(IV) in ethanol solution
VL  - 62
IS  - 8
SP  - 677
EP  - 681
UR  - https://hdl.handle.net/21.15107/rcub_farfar_164
ER  - 

@article{
author = "Milovanović, G.A and Čakar, Mira and Petronijević, R.B",
year = "1997",
abstract = "A kinetic method for the determination of selenium(IV) in ethanol solution is proposed. The method is based on the action of selenium(IV) upon the oxidation of Nile Blue A by hydrogen peroxide in the presence of phosphate buffer (pH 10.8). The reaction rate was followed spectrophotometrically at 637.5 nm. It was established that the action of selenium(IV) on the indicator reaction is maximal with a 0.25% ethanol solution. The kinetic expression for the reaction in the presence and absence of selenium(IV) are postulated. Optimal experimental conditions for the determination of selenium(IV) were established and selenium(IV) was determined in concentrations from 0.95×10 -2 to 12.6×10 -2 ng cm -3 , with a relative standard deviation of 5.2% A lower detection limit (1.6×10 -3 ng cm -3 ) and higher selectivity compared to the determination in aqueous solution are obtained. The method was applied for the determination of selenium(IV) in mineral water.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "A kinetic method for the determination of selenium(IV) in ethanol solution",
volume = "62",
number = "8",
pages = "677-681",
url = "https://hdl.handle.net/21.15107/rcub_farfar_164"
}

Milovanović, G.A, Čakar, M.,& Petronijević, R.B. (1997). A kinetic method for the determination of selenium(IV) in ethanol solution. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 62(8), 677-681.
https://hdl.handle.net/21.15107/rcub_farfar_164

Milovanović G, Čakar M, Petronijević R. A kinetic method for the determination of selenium(IV) in ethanol solution. in Journal of the Serbian Chemical Society. 1997;62(8):677-681.
https://hdl.handle.net/21.15107/rcub_farfar_164 .

Milovanović, G.A, Čakar, Mira, Petronijević, R.B, "A kinetic method for the determination of selenium(IV) in ethanol solution" in Journal of the Serbian Chemical Society, 62, no. 8 (1997):677-681,
https://hdl.handle.net/21.15107/rcub_farfar_164 .