An analytical strategy for quantitative analysis of sulfite in the presence of nitrite uses carbon paste electrode amplified with acetylferrocene and NiO nanoparticle

The analysis of sulfite and nitrite as two important water pollutants is very important in water and wastewater samples. Therefore, an analytical strategy suggests for analysis of sulfite in the presence of nitrite as two harmful environmental pollutants. For the goal, an electrochemical platform based on carbon paste electrode (CPE) modified with NiO nanoparticles (NiO-NPs) and acetylferrocene (AF) was suggested (CPE/NiO-NPs/AF). The CPE/NiO-NPs/AF showed a good electro-catalytic activity for analysis of sulfite in concentration range 0.005–500 μM with limit of detection 0.001 μM. The electro-catalytic interaction between sulfite and AF at a surface of CPE/NiO-NPs/AF can help to resolving overlapping single of sulfite and nitrite for simultaneous determination of them. The CPE/NiO-NPs/AF showed high performance ability for analysis of sulfite and nitrite in wastewater samples.