Yunhua Wu
Jul 15, 2010
Citations
2
Influential Citations
53
Citations
Journal
Food Chemistry
Abstract
Abstract Iron-porphyrin (5,10,15,20-tetraphenyl-21H, 23H-porphine iron(III) chloride) was used in combination with single-wall carbon nanotubes (SWNTs) to modify a glassy carbon electrode (GCE). The electrochemical behavior of Sudan I on the iron-porphyrin-SWNT-DMF ( N , N -dimethylformamide) modified GCE was studied by the cyclic voltammetry and square wave voltammetry. In pH 7.0 Tris–HCl buffers, Sudan I has a sensitive catalytic reduction peak at −0.08 V on the iron-porphyrin-SWNT-DMF modified GCE. Using square wave voltammetry, the linear relationship of Sudan I is 5.03 × 10 −8 mol L −1 –2.01 × 10 −6 mol L −1 with the tropics equation: Δ iP = 3.40C + 3.43 × 10 −6 , and the detection limit is 1 × 10 −8 mol L −1 . And the iron-porphyrin-SWNT-DMF modified GCE was applied successfully in the determination of Sudan I in real samples.