Determination of Iodine in Food by Gold Nanoparticles Modified Electrode Cyclic Voltammetry

Determination of Iodine in Food by Gold Nanoparticles Modified Electrode Cyclic Voltammetry

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In order to find a rapid, simple and sensitive method for determination of iodine in food, a gold nanoparticle modified electrode was constructed by cyclic voltammetry (CV) to detect iodine ion (I-).In Reclining Loveseat with Console situ reduction of gold nanoparticles (Mb@AuNPs) using methanobactin (Mb), and the self-assembled modified electrode was preparaed by electrodeposition.Mb@AuNPs was characterized by transmission electron microscope (TEM), the electrochemical behavior of iodine ion (I-) was investigated by CV.The optimized conditions for iodine ion detection were as follows: Electrodeposition scanning rate 0.

11 V/s, number of scanning cycles 30, buffer concentration 0.05 mol/L, buffer pH 6.5.There was a good linear relationship between oxidation peak current Spin Mop and I- concentration in the range of 0.

01~10.00 μmol/L, R2 was 0.9992.The detection limit was 2.

88 nmol/L (S/N), and the quantitation limit was 9.60 nmol/L.The recoveries of iodine content in different foods were 96.22%~103.

57%.The results show that the modified electrode has good precision, stability, reproducibility and anti-interference ability for the determination of I-, which meets the requirements of the determination method and can be used for the determination of I- in practical samples.