TY  - CONF
AU  - Blagojević, Bratislav
AU  - Gajinov, Spasenka
AU  - Potkonjak, Nebojša I.
AU  - Blagojević, Slavica M.
AU  - Pejić, Nataša
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9256
AB  - The performances of mixtures of different surfactants: anionic (sodium
lauryl ether sulfate (SLES) and ά-olefin sulfonates (AOS), amphoteric (coco
betaine) and nonionic (coco amide, amine oxide, AO and various etoxylated
alcohols, C12-C15-7EO, C10-7EO and C9-C11-7EO), were studied. The
parameters measured were critical micelle concentration (CMC) and surface
tension of particular tenside mixture. The combination of SLES/AOS/C9-
C11-7EO/AO at ratio 75/15/7/3 achieved the lowest both the CMC and
surface tension compared to the other examined tenside mixtures
(SLES/AOS, SLES/AOS/coco betaine/AO, SLES/AOS/coco amide/AO,
SLES/AOS/C12-C15-7EO/AO and SLES/AOS/C10-7EO/AO). This study
showed that adding nonionic tenside (alcohol ethoxylate, C9-C11-7EO)
improved SLES/AOS foaming properties, synergism in detergency between
them. The reduction in the surface tension was obtained, thus indicated that
alcohol ethoxylate, C12-C15-7EO, C10-7EO and C9-C11-7EO can be used
to produce better cleaning products.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Determination of tenside mixtures efficiency: conductometric and stalagmometric investigation
VL  - L-08-P
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9256
ER  - 

@conference{
author = "Blagojević, Bratislav and Gajinov, Spasenka and Potkonjak, Nebojša I. and Blagojević, Slavica M. and Pejić, Nataša",
year = "2014",
abstract = "The performances of mixtures of different surfactants: anionic (sodium
lauryl ether sulfate (SLES) and ά-olefin sulfonates (AOS), amphoteric (coco
betaine) and nonionic (coco amide, amine oxide, AO and various etoxylated
alcohols, C12-C15-7EO, C10-7EO and C9-C11-7EO), were studied. The
parameters measured were critical micelle concentration (CMC) and surface
tension of particular tenside mixture. The combination of SLES/AOS/C9-
C11-7EO/AO at ratio 75/15/7/3 achieved the lowest both the CMC and
surface tension compared to the other examined tenside mixtures
(SLES/AOS, SLES/AOS/coco betaine/AO, SLES/AOS/coco amide/AO,
SLES/AOS/C12-C15-7EO/AO and SLES/AOS/C10-7EO/AO). This study
showed that adding nonionic tenside (alcohol ethoxylate, C9-C11-7EO)
improved SLES/AOS foaming properties, synergism in detergency between
them. The reduction in the surface tension was obtained, thus indicated that
alcohol ethoxylate, C12-C15-7EO, C10-7EO and C9-C11-7EO can be used
to produce better cleaning products.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Determination of tenside mixtures efficiency: conductometric and stalagmometric investigation",
volume = "L-08-P",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9256"
}

Blagojević, B., Gajinov, S., Potkonjak, N. I., Blagojević, S. M.,& Pejić, N.. (2014). Determination of tenside mixtures efficiency: conductometric and stalagmometric investigation. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., L-08-P.
https://hdl.handle.net/21.15107/rcub_vinar_9256

Blagojević B, Gajinov S, Potkonjak NI, Blagojević SM, Pejić N. Determination of tenside mixtures efficiency: conductometric and stalagmometric investigation. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2014;L-08-P.
https://hdl.handle.net/21.15107/rcub_vinar_9256 .

Blagojević, Bratislav, Gajinov, Spasenka, Potkonjak, Nebojša I., Blagojević, Slavica M., Pejić, Nataša, "Determination of tenside mixtures efficiency: conductometric and stalagmometric investigation" in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry, L-08-P (2014),
https://hdl.handle.net/21.15107/rcub_vinar_9256 .

TY  - CONF
AU  - Sarap, Nataša
AU  - Pejić, Nataša
AU  - Maksimović, J.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9275
AB  - A novel procedure for kinetic determination of piroxicam (PX) by the
concentration perturbations of the Bray-Liebhafsky (BL) oscillatory chemical
system was proposed. The response of the BL matrix in a stable non-equilibrium
stationary state close to the bifurcation point, to the perturbation by different
concentrations of PX, is followed by a Pt-electrode. Under the optimized reaction
conditions, the linear relationship between maximal potential shift ΔEm, and PX
concentration was obtained in the concentration range 6.8 × 10−5
 mol L−1 − 1.7 ×
10−3
 mol L−1
 with a detection limit of 3.5 × 10−5
 mol L−1
. The method had a rather
good sample throughput (ST) of 45 samples h−1
 with the recovery RCV = 103.7 %.
Applicatibility of the proposed method to the direct determination of PX in
pharmaceutical formulation (injections) was demonstrated
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
T1  - Determination of piroxicam in pharmaceutical based on an oscillating chemical reaction
VL  - 1
SP  - 294
EP  - 296
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9275
ER  - 

@conference{
author = "Sarap, Nataša and Pejić, Nataša and Maksimović, J.",
year = "2012",
abstract = "A novel procedure for kinetic determination of piroxicam (PX) by the
concentration perturbations of the Bray-Liebhafsky (BL) oscillatory chemical
system was proposed. The response of the BL matrix in a stable non-equilibrium
stationary state close to the bifurcation point, to the perturbation by different
concentrations of PX, is followed by a Pt-electrode. Under the optimized reaction
conditions, the linear relationship between maximal potential shift ΔEm, and PX
concentration was obtained in the concentration range 6.8 × 10−5
 mol L−1 − 1.7 ×
10−3
 mol L−1
 with a detection limit of 3.5 × 10−5
 mol L−1
. The method had a rather
good sample throughput (ST) of 45 samples h−1
 with the recovery RCV = 103.7 %.
Applicatibility of the proposed method to the direct determination of PX in
pharmaceutical formulation (injections) was demonstrated",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry",
title = "Determination of piroxicam in pharmaceutical based on an oscillating chemical reaction",
volume = "1",
pages = "294-296",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9275"
}

Sarap, N., Pejić, N.,& Maksimović, J.. (2012). Determination of piroxicam in pharmaceutical based on an oscillating chemical reaction. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., 1, 294-296.
https://hdl.handle.net/21.15107/rcub_vinar_9275

Sarap N, Pejić N, Maksimović J. Determination of piroxicam in pharmaceutical based on an oscillating chemical reaction. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry. 2012;1:294-296.
https://hdl.handle.net/21.15107/rcub_vinar_9275 .

Sarap, Nataša, Pejić, Nataša, Maksimović, J., "Determination of piroxicam in pharmaceutical based on an oscillating chemical reaction" in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry, 1 (2012):294-296,
https://hdl.handle.net/21.15107/rcub_vinar_9275 .

TY  - CONF
AU  - Pejić, Nataša
AU  - Sarap, Nataša
AU  - Blagojević, Slavica M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9274
AB  - A novel method for the determination of piroxicam (PX) is proposed and validated.
For this purpose, the Bray-Liebhafsky (BL) non-oscillating subsystem (mixture
KIO3 and H2SO4), i.e. Dushman reaction (DR) was used. The proposed method
relies on the linear relationship between maximal potential shift, ΔEm, and the
logarithm of the injected PX amounts in the concentration range 2.0 × 10−5
 mol L−1
− 2.0 × 10−4
 mol L−1
. The sensitivity of the proposed method is 1.5 × 10−5
 mol L−1
.
Some aspects of the possible mechanism of UA action on the DR matrix system are
discussed.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
T1  - Perturbation of the Dushman reaction with piroxicam: experimental and model calculations
VL  - 1
SP  - 291
EP  - 293
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9274
ER  - 

@conference{
author = "Pejić, Nataša and Sarap, Nataša and Blagojević, Slavica M.",
year = "2012",
abstract = "A novel method for the determination of piroxicam (PX) is proposed and validated.
For this purpose, the Bray-Liebhafsky (BL) non-oscillating subsystem (mixture
KIO3 and H2SO4), i.e. Dushman reaction (DR) was used. The proposed method
relies on the linear relationship between maximal potential shift, ΔEm, and the
logarithm of the injected PX amounts in the concentration range 2.0 × 10−5
 mol L−1
− 2.0 × 10−4
 mol L−1
. The sensitivity of the proposed method is 1.5 × 10−5
 mol L−1
.
Some aspects of the possible mechanism of UA action on the DR matrix system are
discussed.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry",
title = "Perturbation of the Dushman reaction with piroxicam: experimental and model calculations",
volume = "1",
pages = "291-293",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9274"
}

Pejić, N., Sarap, N.,& Blagojević, S. M.. (2012). Perturbation of the Dushman reaction with piroxicam: experimental and model calculations. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., 1, 291-293.
https://hdl.handle.net/21.15107/rcub_vinar_9274

Pejić N, Sarap N, Blagojević SM. Perturbation of the Dushman reaction with piroxicam: experimental and model calculations. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry. 2012;1:291-293.
https://hdl.handle.net/21.15107/rcub_vinar_9274 .

Pejić, Nataša, Sarap, Nataša, Blagojević, Slavica M., "Perturbation of the Dushman reaction with piroxicam: experimental and model calculations" in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry, 1 (2012):291-293,
https://hdl.handle.net/21.15107/rcub_vinar_9274 .