Glycerol is widely used as humectant in cosmetics to improve skin's smoothness and moisture. However, its level must be controlled in cosmetics at the risk of causing irritation or allergy. Therefore, determining glycerol concentration in environmental waters with more advanced, inexpensive and accurate sensing systems is of great importance. In this work, a fast, simple, portable and cheap molecular imprinted polymer (MIP) approach is used to develop an electrochemical sensor for glycerol determination. The MIP based screen-printed gold electrode (Au-SPE) is prepared by electro-polymerizing Acrylamide/Bisacrylamide (AAM/NNMBA) and gold nanoparticles (AuNPs) in the presence of glycerol as a template. Techniques, such as cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) are used for electrochemical measurements. Energy-dispersive X-ray spectroscopy (EDS) is utilized to characterize the chemical composition analysis. In contrast to its high response towards glycerol, the electrochemical sensor exhibits negligible responses when exposed to interfering species, such as glycolic acid, glycerol monostearate, tartaric acid, sodium citrate, ammonium sulfate, decyl-glucoside, caprylyl glucoside and glutamic acid. Under optimal experimental conditions, a detection limit (LOD) as low as 0.001 μg/mL (signal-to-noise ratio S/N = 3) is calculated over a linear concentration range (20.00–227.81 μg/mL). Interestingly, the sensor was successfully applied to wastewater samples relating to glycerol determination with a relative standard deviation (RSD) less than 4%. Besides, the reproducibility, the working and storage stabilities of the sensor were proven. According to these outcomes, the electrochemical MIP sensor could be viable enough to detect the presence and levels of pollutants in real water samples.

甘油在化妆品中被广泛用作保湿剂，以改善皮肤的光滑度和水分。但是，在化妆品中必须控制其含量，以免引起刺激或过敏。因此，用更先进，廉价和准确的传感系统确定环境水中甘油的浓度非常重要。在这项工作中，一种快速，简单，便携式和廉价的分子印迹聚合物（MIP）方法被用于开发用于甘油测定的电化学传感器。基于MIP的丝网印刷金电极（Au-SPE）是在甘油作为模板的情况下通过电聚合丙烯酰胺/双丙烯酰胺（AAM / NNMBA）和金纳米颗粒（AuNPs）制备的。循环伏安法（CV）等技术，差动脉冲伏安法（DPV）和电化学阻抗谱（EIS）用于电化学测量。能量色散X射线光谱（EDS）用于表征化学成分分析。与对甘油的高响应相反，电化学传感器在暴露于干扰物（例如乙醇酸，单硬脂酸甘油酯，酒石酸，柠檬酸钠，硫酸铵，癸基葡糖苷，辛基葡糖苷和谷氨酸）时，表现出微不足道的响应。在最佳实验条件下，在线性浓度范围（20.00–227.81μg/ mL）内，检测限（LOD）可低至0.001μg/ mL（信噪比S / N = 3）。有趣的是 该传感器成功应用于与甘油测定有关的废水样品，相对标准偏差（RSD）小于4％。此外，还证明了传感器的可重复性，工作和存储稳定性。根据这些结果，电化学MIP传感器可能足以检测实际水样中污染物的存在和水平。