LAUSR

This work describes preparation and application of “homemade” chloride ISE enriched with iron oxides or zinc oxide nanoparticles. The prepared chloride ISE membrane was made of AgCl:Ag2S:PTFE = 1:1:2 and AgCl:Ag2S:PTFE = 2:1:2 enriched with mentioned nanoparticles in ratio 0.5-1.2 wt.%. Prepared membranes were used for chloride determination in perchloric acid (pH = 0-2) and acetic buffer (pH = 4 – 4.75). Due to the low method price, simplicity and a reasonably fast way of usage, it was considered as a possibility for chloride determination in high acid media. Two of prepared membranes (M1 and M4) have shown best characteristics. M1 showed linear response range for chloride between 2.0×10−6 and 1×10−1 mol L−1, with a detection limit of 2.24×10−6 mol L−1 and potential change of 44.39 mV per decade. M4 showed linear response range for chloride between 4.2×10–6 to 1×10–1 mol L−1, limit of detection of 1.39×10–6 mol L−1 with potential change of 24.79 mV per decade at pH = 0.