Adsorption thermodynamics studies of 2,4,5-trichlorophenoxy acetic acid on poly-o-toluidine Zr(IV) phosphate, a nano-composite used as pesticide sensitive membrane electrode

► Poly-o-toluidine Zr (IV) phosphate used as pesticide selective membrane electrode. ► Working range is 10-10M to 10-1M, with quick response time and could be operated for at least 4 month. ► TEM that the prepared `organic-inorganic' cation-exchanger is a nano-composite material. ► The electrode was successfully applied for direct determination of pesticides.