A kinetic method for the determination of selenium(IV) in ethanol solution
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.
Keywords:
Hydrogen peroxide / Nile Blue A oxidation in ethanol solution / Selenium(IV) kinetic determinationSource:
Journal of the Serbian Chemical Society, 1997, 62, 8, 677-681Publisher:
- Srpsko hemijsko društvo, Beograd
Collections
Institution/Community
PharmacyTY - 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 .