Colombo Matteo, Fossati Filippo, Köhler Robert, Bellmann Martin, Ten Bosch Lars, Avramidis Georg, Candeo Alessia, Valentini Gianluca, Gerhard Christoph
Dipartimento di Fisica Politecnico di Milano Milan Italy.
Faculty of Engineering and Health University of Applied Sciences and Arts Goettingen Germany.
Food Sci Nutr. 2025 Jul 22;13(7):e70565. doi: 10.1002/fsn3.70565. eCollection 2025 Jul.
The aim of this study was to evaluate the effects of CAP plasma on glucose. Plasma treatments were performed using an argon-driven atmospheric pressure plasma device whose discharge environment was initially characterized by optical emission spectroscopy. Each sample was subjected to plasma treatments of increasing duration, up to 16 min. X-ray photoelectron spectroscopy analysis was performed to determine the atomic concentrations of carbon, nitrogen, and oxygen of the outermost surface and to identify the chemical bonding states, revealing significant oxidation of the surface and minor incorporation of nitrogen. Attenuated total reflectance Fourier-transform infrared spectra of each sample were recorded, from which the intensity evolution of the relevant bands over time was derived. The IR spectra indicate an opening of the glucopyranose ring in glucose, suggesting its enveloping degradation due to plasma treatment at different exposition durations with CAP plasma. In addition, reactive oxygen and nitrogen species in the plasma discharge caused the formation of C=O as part of carboxylic groups and small amounts of carbon-nitrogen moieties or carbon-carbon double bonds in the plasma-treated samples.
本研究的目的是评估冷等离子体对葡萄糖的影响。使用氩气驱动的大气压等离子体装置进行等离子体处理，其放电环境最初通过光发射光谱进行表征。每个样品都接受了持续时间不断增加的等离子体处理，最长达16分钟。进行了X射线光电子能谱分析，以确定最外层表面的碳、氮和氧的原子浓度，并识别化学键合状态，结果显示表面有显著氧化且有少量氮掺入。记录了每个样品的衰减全反射傅里叶变换红外光谱，从中得出相关谱带强度随时间的变化。红外光谱表明葡萄糖中的吡喃葡萄糖环打开，这表明在不同暴露时间下用冷等离子体处理导致其发生降解。此外，等离子体放电中的活性氧和氮物种导致在经等离子体处理的样品中形成作为羧基一部分的C=O以及少量的碳氮基团或碳碳双键。
