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M. Conceição B. S. M. Montenegro - One of the best experts on this subject based on the ideXlab platform.
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Construction and evaluation of PVC and sol–gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations
Analytical and Bioanalytical Chemistry, 2006Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec^−1 and 5x10^−6 mol l^−1 and −60.3 mV dec^−1 and 1×10^−4 mol l^−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10^−3–5x10^−2 mol l^−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
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Construction and evaluation of PVC and Sol-Gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations.
Analytical and Bioanalytical Chemistry, 2005Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec−1 and 5x10−6 mol l−1 and −60.3 mV dec−1 and 1×10−4 mol l−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10−3–5x10−2 mol l−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
Emilia M G Santos - One of the best experts on this subject based on the ideXlab platform.
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Construction and evaluation of PVC and sol–gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations
Analytical and Bioanalytical Chemistry, 2006Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec^−1 and 5x10^−6 mol l^−1 and −60.3 mV dec^−1 and 1×10^−4 mol l^−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10^−3–5x10^−2 mol l^−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
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Construction and evaluation of PVC and Sol-Gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations.
Analytical and Bioanalytical Chemistry, 2005Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec−1 and 5x10−6 mol l−1 and −60.3 mV dec−1 and 1×10−4 mol l−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10−3–5x10−2 mol l−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
Alberto N Araujo - One of the best experts on this subject based on the ideXlab platform.
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Construction and evaluation of PVC and sol–gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations
Analytical and Bioanalytical Chemistry, 2006Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec^−1 and 5x10^−6 mol l^−1 and −60.3 mV dec^−1 and 1×10^−4 mol l^−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10^−3–5x10^−2 mol l^−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
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Construction and evaluation of PVC and Sol-Gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations.
Analytical and Bioanalytical Chemistry, 2005Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec−1 and 5x10−6 mol l−1 and −60.3 mV dec−1 and 1×10−4 mol l−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10−3–5x10−2 mol l−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
Cristina M C M Couto - One of the best experts on this subject based on the ideXlab platform.
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Construction and evaluation of PVC and sol–gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations
Analytical and Bioanalytical Chemistry, 2006Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec^−1 and 5x10^−6 mol l^−1 and −60.3 mV dec^−1 and 1×10^−4 mol l^−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10^−3–5x10^−2 mol l^−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
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Construction and evaluation of PVC and Sol-Gel sensor membranes based on Mn(III)TPP-Cl. Application to valproate determination in pharmaceutical preparations.
Analytical and Bioanalytical Chemistry, 2005Co-Authors: Emilia M G Santos, Cristina M C M Couto, Alberto N Araujo, M. Conceição B. S. M. MontenegroAbstract:The construction and general performance of new valproate-selective electrodes based on manganese(III) tetraphenylporphyrin [Mn(III)TPP-Cl], as an ionophore, are presented. The ionophore was incorporated into PVC and ceramic membranes (sol–gel) based on methyltriethoxysilane. The influence of membrane composition and pH and the effect of lipophilic cationic and anionic additives in PVC membranes were investigated concerning their influence on the slope, response time, selectivity and lifetime of the electrodes. The PVC membrane without additive and the sol–gel membrane presented slopes and practical limits of detection of −60.8 mV dec−1 and 5x10−6 mol l−1 and −60.3 mV dec−1 and 1×10−4 mol l−1, respectively. The sol–gel membranes displayed higher selectivity for valproate when compared with PVC membranes. These two types of electrodes were coupled to a sequential-injection analysis (SIA) system for the direct determination of valproate in pharmaceutical formulations. The association of Mn(III)TPP-Cl with the sol–gel support inserted in a SIA system provided potentiometric sensors with an analytical range of 1x10−3–5x10−2 mol l−1, with a sample rate of 55 samples per hour and a sample and carrier consumption of 140 and 2,500 μl per determination, respectively.
C.m. Lampert - One of the best experts on this subject based on the ideXlab platform.
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Electrochromic characterization of Sol-Gel deposited coatings
Solar Energy Materials and Solar Cells, 1998Co-Authors: N. Ozer, C.m. LampertAbstract:Abstract Electrochromic devices have increasing application in large-area display devices, switchable mirrors and smart windows. A variety of vacuum deposition technologies have been used to make electrochromic devices. The sol–gel process offers an alternative approach to the synthesis of low-cost, high-quality electrochromic device layers. This paper discusses the developments in sol–gel-deposited electrochromic films and a prototype all sol–gel device with switching from 80% to 50% (550 nm). The sol–gel process involves the formation of oxide networks upon hydrolysis–condensation of alkoxide precursors. In this study, we cover sol–gel-deposited oxides of WO3, TiO2, Nb2O5, V2O5, Ni(OH)2, Co(OH)2 and CuOx. The coloration reaction voltammetry and spectral optical properties are presented for selected films.
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Sol-Gel deposited electrochromic coatings
1995Co-Authors: N. Ozer, C.m. LampertAbstract:Electrochromic devices have increasing application in display devices, switchable mirrors and smart windows. A variety of vacuum deposition technologies have been used to make electrochromic devices. The sol- gel process offers an alternative approach to the synthesis of optical quality and low cost electrochromic device layers. This study summarizes the developments in Sol-Gel deposited electrochromic films. The Sol-Gel process involves the formation of oxide networks upon hydrolysis-condensation of alkoxide precursors. In this study we cover the Sol-Gel deposited oxides of WO[sub 3], V[sub 2]O[sub 5], TiO[sub 2], Nb[sub 2]O[sub 5], and NiO[sub x].
