The formation of thiols has a notable and detrimental sensory impact, especially in the aroma of bottled wines. Their detection in wine is of great interest to avoid important economic and image losses for wineries. This work reports the study of different cobalt phthalocyanine/nanomaterials-based sensors for the headspace detection of volatile thiols. The amperometric procedure based on the use of carbon sensors simply modified with cobalt phthalocyanine showed the best performance. Under the optimum conditions of applied potential, +0.8 V, and pH of the supporting electrolyte, 2.6, this procedure shows a reproducibility of 7% (n = 5) in terms of relative standard deviation of the slopes of calibration curves built in the concentration range from 9.9 to 82.6 μg/L, a capability of detection of 12.5 μg/L and a decision limit of 6.5 μg/L (α = β = 0.05). The use of this electrocatalytic material and the headspace measurements reduce interferents, increasing the selectivity of the procedure, which allows the easy and successful quantification of ethanethiol in white and red wines.

硫醇的形成具有显着且有害的感官影响，尤其是在瓶装葡萄酒的香气中。它们在葡萄酒中的检测对于避免酿酒厂的重大经济和形象损失具有重要意义。这项工作报告了基于不同钴酞菁/纳米材料的传感器用于挥发性硫醇顶空检测的研究。基于使用简单地用钴酞菁修饰的碳传感器的安培计程序表现出最佳性能。在施加电位的最佳条件下，+0.8 V 和支持电解质的 pH 值 2.6，此过程显示在浓度中建立的校准曲线斜率的相对标准偏差方面的重现性为 7% (n = 5)范围从 9.9 到 82.6 μg/L，检测能力为 12.5 μg/L，决定限为 6.5 μg/L (α = β = 0. 05). 这种电催化材料和顶空测量的使用减少了干扰物，增加了程序的选择性，从而可以轻松成功地对白葡萄酒和红葡萄酒中的乙硫醇进行定量。