Browsing by Author "Thamarai selvi, J"
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Item A new simple method for tlie preparation of urea and oxalate ion selective electrode-its preparation and analytical application(2010) Thamarai selvi, JA lieterogeneous precipitate has been as ion carriers for the preparation of urea and oxalic acid selective membrane sensor. The electrodes give near-N'emstian response in the linear concentration range of 1 M to 1x10' M \s ith detection limits of ilie orders of lO"* M . fhe stable potentiometric signals are obtained \Gth in a short time period ot 3 seconds. Tlie effect of pli and the effect of medium have been studied, found to give a better responses selectisit) coefficient \alues pot ( log ) and ( log o^al'cacid n.xed interference method. Tlie sensors have also been used as urea determination in fertilizers.Item Potcntiometric Determination of Copper (II) and Nickel (II) Ions Using Barium Sulphate as an Electro Active Material(2010) Thamarai selvi, JA lieu Araldite matrix membrane electrode for Cii’ ’ and Ni" ' ion based on their liarium diehromaie ;is membrane carrier as prepared. I he Nernsiian lespon-ic lor ('u and Ni ion o\er a u ule eoneentraiion ranee ot ( 1 M - 1 \ It)' .M) u nh tleleetion limits of the order o f 1 n ' \ l | he response time ot the sens;ir is -to seconds for Cir Ions and .‘'2 seconds for NI ions and membrane c>in be used for more than six month itlu'ut obsersiim .nu desiation the [sroposed membrane sensor sluuvs excellent discriminaiine abiht} touards Cir and Ni" ions in comparison to severtil alkali, alkaline earth, transition and hea\> metal ions, i'he effect of pH aiul effect of medium, seleetisits co-efficient calues ha\e been found to eise better res|ionses.Item Potentiometric Determination of Urea and Nitric Acid using Urea Nitrate as an Electro Active Material-its Analytical Applications(2010) Thamarai selvi, JA heteroueneous precipitate have been as ion carriers tor the preparation of urea and oxalic acid selective membrane sensor. The electrodes gisc near-Nemstian response in the linear concentration range of IM to lx 10"’ M \'.iih detection limits of the orders of 10 ' M. The stable potentiometric signals are obtained \sith in a short time period of 3 seconds. I’he effect ofp H and th'e effect of medium ha\e been studied, found to give a better responses selectivits coefficient \alues K K (log urea )and(log Nitric acid ) esaluated using fixed interference method. I'he sensors luise also been used as urea determination m fertilizersItem Potentiometric Determination of Calcium Ion using some newly prepared Calcium Ion Selective Electrodes and their Analytical Application(2014-06) Vijayalakshmi, A; Thamarai selvi, J