Sawatmuenwai Pantipa, Kaewket Keerakit, Ngamchuea Kamonwad
School of Chemistry Institute of Science Suranaree University of Technology, 111 University Avenue, Suranaree, Muang, Nakhon Ratchasima 30000, Thailand.
J Anal Methods Chem. 2024 Sep 28;2024:1809578. doi: 10.1155/2024/1809578. eCollection 2024.
This work introduces a Nafion-coated copper(I) oxide nanoparticle electrode (Nafion/CuO/GC) designed for the electrochemical detection of methanol (CHOH). The responses of the composite material toward CHOH were enhanced by the selective permeation of CHOH through the hydrophilic channels of the Nafion membrane in combination with the electroactivity of CuO nanoparticles. The sensor displayed a linear detection range of 0.33-100 mM CHOH with a sensitivity of 0.17 A·mM and a detection limit (3 s/m) of 0.10 mM. It exhibited excellent reproducibility with a relative standard deviation of <5%. The sensor's practical applicability was demonstrated through recovery studies on hand sanitizer samples, achieving ca. 100% recovery. The sensor was further used to elucidate CHOH adsorption on activated carbon, revealing that the process conforms to the Langmuir isotherm model.
这项工作介绍了一种用于甲醇（CH₃OH）电化学检测的涂有Nafion的氧化铜纳米颗粒电极（Nafion/CuO/GC）。通过甲醇透过Nafion膜的亲水通道的选择性渗透与CuO纳米颗粒的电活性相结合，复合材料对CH₃OH的响应得到增强。该传感器对CH₃OH的线性检测范围为0.33 - 100 mM，灵敏度为0.17 A·mM，检测限（3s/m）为0.10 mM。它具有<5%的相对标准偏差，表现出优异的重现性。通过对手部消毒剂样品的回收率研究证明了该传感器的实际适用性，回收率约为100%。该传感器还被用于阐明甲醇在活性炭上的吸附情况，结果表明该过程符合朗缪尔等温线模型。
