Targeted modification of the carbon paste electrode by natural zeolite and graphene oxide for the enhanced analysis of paracetamol

•A simple bulk modification of carbon paste with electrocatalytic natural zeolite and highly conductive graphene oxide.•Fabrication of electrochemical sensor with amplified response towards paracetamol, resulting from the catalytic effect.•High selectivity and low limit of detection (7.8 nM) ensured by the proposed modification.•Practical application of the fabricated sensor in determination of PAR in pharmaceuticals and human urine and serum.