AI Article Synopsis
- A nanocomposite sensor was created using Ag nanoparticles on AgCl/AgS decorated onto multi-walled carbon nanotubes and chitosan to detect key ingredients in whitening lotions, like hydroquinone (HQ), arbutin (AR), and ascorbyl glucoside (AA2G).
- The modified glassy carbon electrode demonstrated impressive electrocatalytic performance, achieving higher current responses and favorable detection limits for each analyte without interference.
- The sensor provided accurate measurements of HQ, AR, and AA2G in whitening lotion samples, aligning closely with results obtained from the established HPLC method.
Article Abstract
A nanocomposite comprising Ag nanoparticles on AgCl/AgS nanoparticles was decorated on multi-walled carbon nanotubes and used to modify a glassy carbon electrode. Chitosan was also formulated in the nanocomposite to stabilize AgS nanoparticles and interact strongly with the glucose moiety of arbutin (AR) and ascorbyl glucoside (AA2G), two important ingredients in whitening lotion products. The modified electrode was characterized by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) and cyclic voltammetry and used for the simultaneous analysis of hydroquinone (HQ), AR, and AA2G. The electrode showed excellent electrocatalysis towards the analytes by shifting the anodic peak potential to a negative direction with ≈5-fold higher current. The sensor displayed a linearity of 0.91-27.2 μM for HQ, 0.73-14.7 μM for AR, and 1.18-11.8 μM for AA2G, without cross-interference. A detection limit was 0.4 μM for HQ, 0.1 μM for AR, and 0.25 μM for AA2G. The sensor was applied to determine HQ, AR, and AA2G spiked in the whitening lotion sample with excellent recovery. The measured concentration of each analyte was comparable to that of the high performance liquid chromatographic (HPLC) method.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7466507 | PMC |
| http://dx.doi.org/10.3390/nano10081583 | DOI Listing |
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