Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, 153-8505, Meguro-ku, Tokyo, Japan.
Chempluschem. 2021 Jun;86(6):798-802. doi: 10.1002/cplu.202100041. Epub 2021 Mar 31.
We report a paper-based chemosensor array device (PCSAD) for the quantitative detection of oxyanions including the herbicide glyphosate (GlyP) in aqueous media. The mechanism of the oxyanion detection relies on a coordination-binding-based sensor array. In this study, the competitive coordination binding among Zn , four catechol dyes, and seven oxyanions caused noticeable colour changes. The colour changes were employed for qualitative and quantitative analyses using an in-house automated image-processing algorithm with pattern recognition for digital images. A linear discrimination analysis discerned similarly structured oxyanions with 100 % accuracy. The regression analysis allowed the accurate quantification of GlyP in the herbicide products with a limit of detection of 16 mg/L, which is lower than the health advisory value for children (20 mg/L) stipulated by the environmental protection agency (EPA). PCSAD is a powerful sensor device for the on-site quantification of aqueous anions for environmental assessment.
我们报告了一种基于纸张的化学传感器阵列器件 (PCSAD)，用于定量检测水溶液中的阴离子，包括除草剂草甘膦 (GlyP)。阴离子检测的机制依赖于基于配位结合的传感器阵列。在这项研究中，Zn 与四种儿茶酚染料和七种阴离子之间的竞争配位结合导致了明显的颜色变化。使用内部自动化图像处理算法和数字图像的模式识别进行了定性和定量分析，颜色变化可用于分析。线性判别分析以 100%的准确率辨别出结构相似的阴离子。回归分析允许准确地对除草剂产品中的 GlyP 进行定量，检测限为 16mg/L，低于环境保护署 (EPA) 规定的儿童健康建议值 (20mg/L)。PCSAD 是一种用于环境评估的现场定量检测水溶液阴离子的强大传感器设备。
