Hydroquinone analysis in liposome carrier using a voltammetric sensor

Hydroquinone (HQ) has a variety of uses principally associated with its action as a reducing agent that is soluble in water. It is a major component in most black and white photographic developers for film and paper where, with the compound Metol, it reduces silver halides to elemental silver. There are various other uses associated with its reducing power. As a polymerization inhibitor, hydroquinone prevents polymerization of acrylic acid, methylmethacrylate, cyanoacrylate, and other monomers that are susceptible to radical-initiated polymerization. This application exploits the antioxidant properties of hydroquinone [1]. An ionic liquid-modified NiO nanoparticles paste electrode has been fabricated as a voltammetric sensor. . This electrode showed enhanced electrochemical response and stronganalytical activity towards the direct electrochemical oxidation of HQ. The electron transfercoefficient, α, and diffusion coefficient of HQ at the modified electrode were calculated. Under optimal conditions at pH 7.0, the anodic peak currents increased linearly with the concentrationof HQ in the range of 50.0–400 μM with a detection limit of 30.0 μM (3σ). The interferences of foreign substances were investigated. Cyclic voltammetry was used to check the applicability of the proposed sensor to the determination of HQ in real samples with satisfactory results. Figure 1 shows catalytic effect of recommend procedure at an optimum condition.

Keywords:

Hydroquinone , NiO nanoparticles , Ionic liquids , Voltammetric analysis