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|Title:||Mercury(II) ion sensing with PVC-matrix based membrane sensors|
|Authors:||Mahajan, Rakesh Kumar|
Lobana, Tarlok S
|IPC Code:||Int. Cl.8 G01N27/333|
|Abstract:||Thiosemicarbazone derivatives have been used as ion carriers for the preparation of PVC-matrix based mercury(II)selective membrane sensors. The electrodes give near-Nernstian responses in the linear concentration range of 1.0×10-1-5.0×10-6 M with detection limits of the order of ~10-6 M . The stable potentiometric signals are obtained within a short time period of 20-255. The effect of different plasticizers has been studied and dioctylsebacate (DOS) found to give a better response in comparison to other plasticizers. Selectivity coefficient values (log KPotHg,M ) have been evaluated using fixed interference method. Better selectivity for mercury(II) ions is observed over many of the mo novalent (Na+, K+ and NH4+) and divalent ions (Mg2+, Ca2+, Zn 2+ , Pb2+ , Ni2+, Co2+, etc.). The sensors have also been used as indicator electrodes in potentiometric titration of mercury(II) ions with EDT A and its determination in synthetic water samples.|
|Appears in Collections:|| IJC-A Vol.45A(03) [March 2006]|
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