Styrene sulphonic acid (SSA) doped polyaniline (PAni) was chemically synthesized. The synthesized
product SSA-PAni was treated with 3-(aminopropyl) triethoxysilane in order to achieve a functional
terminal of NH2 group. This functional nanopolymer has been electrochemically deposited on to the
working area of a carbon screen printed electrode (carbon SPE). Incubation of the SSA-PAni modified
carbon SPE with anti-atrazine antibodies yielded the formation of a pesticide immunosensor. This
immunosensor offered specific and highly sensitive detection (limit of detection 0.01 ng/mL) of atrazine
over a wide concentration range (0.01–50 ng/mL)