Simultaneous Determination of Thallium and Lead on a Chemically Modified Electrode with Langmuir-Blodgett Film of a p-tert-Butylcalix[4]arene Derivative

A new voltammetric sensor, Langmuir-Blodgett (LB) film of a p-tert-butylcalix[4]arene derivative modified glassy carbon electrode, was designed and Successfully used in simultaneous determination of Tl+ and Ph2+ by square-wave anodic stripping voltammetry Under the optimum experimental conditions, this newly developed sensor reveal good linear response for Tl+ and Pb2+ in he Concentration range of 3 x 10(-8)-4 x 10(-6) mol L-1 and 2 x 10(-7) - 2 x 10(-5) mol L-1 respectively. The detect limits are 2 x 10(-8) mol L-1 for Tl+ and 8 x 10(-8) mol L-1 for Pb2+. Using proposed method, Tl+ and Pb2+ in environment samples were determined with satisfactory results.