Citation: LU Li-Xia, WANG Yang, LIN Xiao-Xiao, LI Xin-Yao, XIN Meng-Na. Colorimetric Detection of Iodine Ion Based on Its Inhibition Effect on Peroxidase-Like Activity of Platinum Nanoparticles[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(1): 94-99. doi: 10.11895/j.issn.0253-3820.171220 shu

Colorimetric Detection of Iodine Ion Based on Its Inhibition Effect on Peroxidase-Like Activity of Platinum Nanoparticles

Key Laboratory of Food Nutrition and Safety of Shandong Normal University, College of Life Science, Shandong Normal University, Jinan 250014, China

Received Date: 2 September 2017
Revised Date: 29 September 2017

Fund Project: This work was supported by the Natural Science Foundation of Shandong Province, China (No.ZR2016CM47).

As an important inorganic element, iodine not only plays an important role in human growth and metabolism, but also has an irreplaceable role in the chemical engineering, medicine, food and other fields. Thus the detection of iodine ion is of important significance. In this work, colorimetric recognition and sensing of iodine ion with high sensitivity was proposed based on target induced shielding of the peroxidase-like activity of bare platinum nanoparticles (PtNPs). This assay exhibited simplicity and cost-effectiveness. The recognition of iodine ion by bare PtNPs could be fulfilled in a few seconds and the assay could be accomplished within 10 min. The detection range for iodine ion was 20 nmol/L-5.0 μmol/L and the detection limit was 8 nmol/L (S/N=3). Furthermore, the new assay system did not require surface modification of nanoparticles, nor complex organic synthesis. This assay was successfully applied to detection of iodine concentration in real salt and water samples, exhibiting promising application prospects.
- Platinum nanoparticles,
- Peroxidase mimics,
- Iodine ion,
- Catalytic activity
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