Glassy Carbon Electrode Modified with Functionalized Carbon Nanotubes Within a Poly(allylamine hydrochloride) Film for the Voltammetric Determination of Sulfite in Foods

作者：Sartori Elen Romao; Takeda Humberto Hissashi; Fatibello Filho Orlando

来源：Electroanalysis, 2011, 23(11): 2526-2533.

DOI：10.1002/elan.201100122

• Glassy carbon electrode
• Multiwalled carbon nanotubes
• Modified electrode
• Poly(allylamine hydrochloride)
• Sulfite determination

The performance of a glassy carbon electrode modified with functionalized multiwalled carbon nanotubes within a poly(allylamine hydrochloride) film (GCE/PAH/MWCNTs) for the voltammetric determination of sulfite in food samples is described. The anodic peak potential for sulfite oxidation at a GCE/PAH/MWCNTs was 0.41 V whereas at GCE/PAH and GCE, the peak potentials were 0.96 and 0.89 V, respectively. Using square-wave voltammetric technique, the obtained analytical curve was linear in the sulfite concentration range from 1.1 x 10(-5) to 3.9 x 10(-4) M, with a detection limit of 4.2 mu M. The electrode was successfully used to determinate sulfite in vinegar, pickle water, coconut water, and shredded coconut.

• 出版日期2011-11