Butwong Nutthaya, Kunawong Thidarat, Luong John H T
Applied Chemistry Department, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, 744, Suranarai Rd., Nakhon Ratchasima 30000, Thailand.
School of Chemistry, University College Cork, T12 YN60 Cork, Ireland.
Nanomaterials (Basel). 2020 Aug 12;10(8):1583. doi: 10.3390/nano10081583.
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.
一种由负载于氯化银/硫化银纳米颗粒上的银纳米颗粒组成的纳米复合材料被修饰在多壁碳纳米管上，并用于修饰玻碳电极。壳聚糖也被配制在纳米复合材料中，以稳定硫化银纳米颗粒，并与美白护肤产品中的两种重要成分熊果苷（AR）和抗坏血酸葡萄糖苷（AA2G）的葡萄糖部分强烈相互作用。通过傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）和循环伏安法对修饰电极进行了表征，并用于同时分析对苯二酚（HQ）、AR和AA^{2}G。该电极通过将阳极峰电位向负方向移动且电流提高约5倍，对分析物表现出优异的电催化性能。该传感器对HQ的线性范围为0.91 - 27.2 μM，对AR为0.73 - 14.7 μM，对AA^{2}G为1.18 - 11.8 μM，无交叉干扰。HQ的检测限为0.4 μM，AR为0.1 μM，AA^{2}G为0.25 μM。该传感器用于测定美白护肤样品中加标的HQ、AR和AA^{2}G，回收率良好。各分析物的测定浓度与高效液相色谱（HPLC）法相当。
