Browsing by Author "Thamarai Selvi, J"
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Item Calcium ion Selective Electrode Based on Acyclic Polyether Based lonophore & its Analytical Application(2017) Thamarai Selvi, JA new, efficient Calcium ion selective electrode has been prepared using acyclic polyether based ionophore. The prepared ionophore is characterized by UV, FT-IR, XRD. Electrochemical impedance spectroscopy (EIS) technique is also employed to study the electrochemical & surfacereactions. The sensor exhibits a near Nernstian response for Ca(II) ion over a concentration range of 1.0 X 10"'M tol.O M. The proposed sensors revealed relatively good selectivity and high sensitivity for Ca(II) over a mono and divalent cations. It can be used with in the pH range of 3.42 to 6.24. The effect of medium and the selectivity coefficient values was evaluated using fixed interference method found to give a better response. The influence of temperature on electrode potential was studied & it can be used in the determination of thermodynamic functions like AG, AH& AS. It was also successfully used in the analysis of concentration of Calcium ion in various real samples.Item Calcium Ion Selective Electrode Based On Surface Modified Zeolite Based lonophore & Its Analytical Application(2017) Thamarai Selvi, JA new, efficient Calcium ion selective electrode has been prepared using Surface modified Zeolite based ionophore.The prepared ionophore is characterized by UV,FT-IR,XRD..The sensor exhibits a near Nernstian response for Ca(ll) ion over a concentration range of 1.0 X 10’* M tol ,0 M . The proposed sensors revealed relatively good selectivity and high sensitivity tor Ca(ll) over a monovalent cations. It can be used with in the pH range of 5.57 to 6.24 . The effect of medium and the selectivity coefficient values was evaluated using fixed interference method found to give a better response.. It was also successfully used in the analysis of concentration of Calcium ion in various real samples.Item Calcium Ion Selective Electrode Based on Vinyl Acetic Acid Grafted PVC lonophore & Determination of Thermodynamic Functions & Its Analytical Application(2017) Thamarai Selvi, JA new, elTicient Calcium ion selective electrode has been prepared using Vinyl acetic acid grafted PVC based ionophore. The influence of temperature on electrode potential was studied & it can be used in the determination of thermodynamic function like AQ AH & AS. The electrochemical impedance spectroscopy (EIS) technique is also employed to study the electrochemical & surface reactions. It was also successfully used in the analysis of concentration of Calcium ion in various real samples.Item Calcium Iron Selective Electrode Based on Polyurethane Nanofibres Ionophore and its Analytical Application(2017) Thamarai Selvi, Jm A new. 1‘flicicnt Calcium ion seleciivc electrode has been prepared using Polyurethane nanofibre based ionojihore The prepared tonophore is .-haiactcnzcd by UV. I T-IR. XRO The sensor exhibits a near Ncmsiian response forCa(ll) ion over a concentration range of 1.0 X 10-8 M tol .0 ,M Ihc proixiscd sensors revealed relatively good selectivity and high sensitivity for Ca(ll) over a monova lent cations. It can be used with in the pH lange of 5 57 to 6 24. The effect of medium and the selectivity coefficient values was evaluated using fixed interference method It was also successfully used in the analysis o f concentration of Calcium ion in various real samples.Item Cellulose acetate based Eco friendlj' membrane preparation and its application studies(2017) Thamarai Selvi, JThe aim o f the stud> is to prepare the cellulose acetate & amla based on green membrane by low cost and eco - ^endlv method The prepared membrane has been characterized b> using R-IR, ,SEM & TG.A analysis. The green I tnenibrane has been applied to salt> water filtration. The Tiltrate-d water is used to study the physico-chemical parameters. \1ost of the parameters correlated w ith the value prescribed by WHO.Item Cellulose Acetate Starch Blend Green Membrane Preparation and its application(2017) Thamarai Selvi, JThe aim of the study is to prepare the green membrane by low cost and eco-friendly method. The prepared membrane has been characterized by using FT-IR, SEM and TGA analysis. The green membrane has been applied to salty water filtration. The filtered water is used to study the physiochemical parameters. Most of the parameters are correlated with the values prescribed by World Health Organisation.Item Development of PANI-EPOXYfiESIN - GOD Electrode by Potentiomctric Method for Determination of Glucose(2011) Thamarai Selvi, J; Vijayalakshmi, AThe poKanilinc-epoxy resin-glucose oxidase (F’ANI-EPOXY RESIN-GOD) electrode has been investigated in the present work. The synthesized PANI-EPOXY RESIN composite films were characterized b\ electrochemical technique, electrical conductivity. UV-visible spectroscopx. Fourier transform infrared (FT IR ) spectroscopy and scanning electron microscope (SEM). The GOD was immobilized on synthesized PANI-Araldite film by cross-linking via Glutaraldehxde in phosphate buffer.Item Development of PANl-EPOXYRESIN - GOD electrode by potentiometric method for determination of Glucose(2011) Thamarai Selvi, JThe polyaniline-epoxy resin-glucose oxidase (PANI-EPOXY RESIN-GOD) electrode has been investigated in the present work. The sv nthesized PANI-EPOXY RESIN composite films were characterized by electrochemical technique, electrical conductivity. UV-visible spectroscopy. Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM). The GOD was immobilized on synthesized PANI-Araldite film bv cross-linkins via Glutaraldehvde in phosphate buffer.Item Friendly Membrane Preparation and its Application Studies(2016) Thamarai Selvi, JItem A Heterogeneous Precipitate Based Magnesium Ion Selective Electrode-lts Preparation and Analytical Application(2014) Thamarai Selvi, JA iiev. :.iin(,'lc ion seliHilivt; olecliu de poly yvinyi c lilr'iu k s me rnbi.in o r.unsoi fr'' Mg d l' lOns tiased on inag nesiu in SalicylateItem A Heterogeneous Precipitate Based Magnesium Ion Selective Electrode-lts Preparation and Analytical Application(2014) Thamarai Selvi, JA new simple ion-seleotive electrode poly (vinyl chloiidej membrane sensor foi Mg (II) ions based on magnesium Salicylate as a new ionophore has been prepared and studied 1 he electrode exhibits a good potentiomotric response for Mg (It) ion over a wide concentration range 1 Ox 10' to 1 0x10 N with a slope value ol electrode-1 was 23 mv/decade and 2(1 mv/decade loi niectiDde-ll The elecliocle can be used over ? months with good lepioducibilily 1 he senso' was" ised as an indicaloi electiode in n polontiometiic titration ol Mg (II) ions against (-DTA 1 he sensi t was used lo deieimine the Mg (II) ions m baby lood products and spmacnItem A Heterogeneous Precipitate Based Potassium Membrane Ion Selective Electrode-Its Preparation and Analytical Application(2011) Thamarai Selvi, JA new potassium ion-selective membrane electrode has been developed based on heterogeneous precipitate and the membrane was development using epoxy resin. An anaK tically useful potential changes occur in the 1 tolO'^M concentration range of KCl. The slope of the linear portion (1 \ 1 o '- 1 x 10’^ M) was 55mv decade. The stable potentiometric signals are obtained with in a short period of 7 seconds. In the presence of lxl0"^M potassium no interference was observed for Na*, Mg’*, Ba"'', Mn’*, .Ni'*, Cu’*, F , CT, Br-. r,S0 4*' ions. The effect of pH and effect of medium have been standardized found to give better response life time of the electrode was approximately 3 months. This electrode has been used for the determination of potassium ion commercially available product.Item A Heterogeneous Precipitate Based Sodium Ion Membrane Sensors-Its Preparation and Analytical Application(2011) Thamarai Selvi, JA heterogeneous precipitate have been used as ion carriers for the preparation ofNa(l) selective membrane sensor. This electrode give near-nernstian responses in the linear concentration range of IM to 1X10'^ M with detection limits of the order of 10'^ M. The stable potentiometric signals are obtained with in a short time period of 4 minutes.The effect of pH and the effect of medium have been studied found to give a better response selectivity coefficient values (log have been evaluated using fixed interference method.The sensor have also been used as indicator electrode in commercial products.Item A Heterogeneous precipitate based sodium ion membrane sensors-Its preparation and analytical application(2011) Thamarai Selvi, JA heterogeneous precipitate have been used as ion carriers for the preparation ofNa(I) selective membrane sensor. This electrode give near-nernstian responses in the linear concentration range o f 1M to 1X10'^ M with detection limits ofthe order of 10'^M. The stable potentiometric signals are obtained with in a short time period o f 4 minutes.The effect o f pH and the effect o f medium have been studied found to give a better response selectivity coefficient values (log ^ ) have been evaluated using fixed interference method.The sensor have also been used as indicator electrode in commercial products.Item A Heterogeneous precipitate based sodium ion membrane sensors-Its preparation and analytical application(2011) Thamarai Selvi, JA heterogeneous precipitate have been used as ion carriers for the preparation ofNa(I) selective membrane sensor. This electrode give near-nernstian responses in the linear concentration range o f IM to ] X10'^ M with detection limits ofthe order of 10'^ M. The stable potentiometric signals are obtained with in a short time period of 4 minutes.The effect o f pH and the effect of medium have been studied found to give a better response selectivity coefficient values (log ) have been evaluated using fixed interference method.The sensor have also been used as indicator electrode in commercial products.Item A heterogeneous precipitate based sodium membrane ion selective clcctrode-its preparation and analytical application(2011) Thamarai Selvi, JA heterogeneous precipitates ha\e been as ion caaiers for the preparation of Na (I) scicetise membrane sensor. The electrodes give near nemstian responses in linear concentration range of IM to 1x10'"M with detection limits ofthe order of 10'\\1. The stable potent iometric signals are obtained with in a short time period of 3 minutes. The effect of pH, and the effect of medium have been studied found to give a better response. Selectively coefficient values have been evaluated using fixed interference method. The sensors have also been as an indicator electrode in commercially available products.Item A Heterogeneous Precipitate Based Sodium Membrane Ion Selective Electrode-lts Preparation and Analytical Application(2011) Thamarai Selvi, JA heterogeneous precipitates have been as ion carriers for the preparation of Na (I) selective membrane sepsor. This electrode give near-nernstian responses in linear concentration range of 1M to 1X10 with detection limits of the order of 10 ‘M The stable potentiometnc signals are obtained with in a short time period of 3 minutes The effect of pH, and the effect of medium have been studied found to give a better response. Selectively coefficient values (log „) have been evaluated using fixed interference method The sensors have also been used as indicator electrode in commerdallv available productsItem A Heterogeneous Precipitate Based Sodium Membrane Ion Selective Electrode-lts Preparation and Analytical Application(2011) Thamarai Selvi, JA heterogeneous precipitates have been as ion earners for the preparation of Na (I) selective membrane sensor This electrode give near-nernstian responses in linear concentration range of 1M to 1X10 with detection limits of the order of 10 ‘M The stable potentiometnc signals are obtained with in a short time period ol 3 minutes. The effect of pH. and the effect of medium have been studied found to give a better response Selectively coefficient values {log „ ) have been evaluated using fixed interference method The sensors have also been used as indicator electrode in commerciallv available productsItem A Heterogeneous Precipitate based Sodium Membrane Ion Selective Electrode: Its Preparation and Analytical Application(2012) Thamarai Selvi, J; Aiswarya Lakshmy, P RA heterogeneous precipitates have been as ion carriers for the preparation of Na (I) selective membrane sensor. The electrodes give near-nernstian responses in linear concentration range of IM to IxlO'^M with detection limits of the order of 10~*M . The stable potentiometric signals are obtained with in a short time period of 3 minutes. The effect of pH, and the effect of medium have been studied found to give a better response. Selectively coefficient values (log K'^°' ) have been evaluated using fixed interference method. The sensors have also been as an indicator electrode in commercially available products.Item A Heterogeneous Precipitate Haset Sodium Membrane Ion Selective Electrode-Its Preparation and Analytical Application(2011) Thamarai Selvi, JA heterogeneous precipitates have been as ion carriers for the preparation ofNa (1) selective membrane sensor. The electrodes give nearnemstian responses in linear concentration range of IM to 1 \ 1 0 with detection limitsoftheorderof 10'‘M . The stable potentiometric signals are obtained with in a short time period of 3 minutes. The elTect of pH, and the elTect of medium have been studied found to give a better response. Selectively coefficient values (log ) have been evaluated using fixed interference method. I'he sensors have also been as an indicator electrode in commerciallv available products.