改性天然橡胶作为一种简单的化学传感器，结合智能手机检测，用于检测海鲜样品中的甲醛含量。
Modified Natural Rubber as a Simple Chemical Sensor with Smartphone Detection for Formaldehyde Content in a Seafood Sample.
机构信息
Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand.
Center of Excellence for Innovation in Analytical Science and Technology for Biodiversity-Based Economic and Society (I-ANALY-S-T_B.BES-CMU) and Department of Chemistry, Faculty of Sciences, Chiang Mai University, Chiang Mai 50200, Thailand.
出版信息
Molecules. 2022 Mar 27;27(7):2159. doi: 10.3390/molecules27072159.
A new biodegradable platform-based sensor for formaldehyde assay is proposed. Natural rubber latex was modified to polylactic acid-chloroacetated natural rubber polymer blend sheets. The polymer blend sheet was grafted using a water-based system with amine monomers as a platform, with a spot exhibiting positive polarity for immobilizing with anionic dye (Acid Red 27). The sensor was exposed to formaldehyde. The color intensity of the dye on the sensor spot would decrease. Using a smartphone with image processing (via ImageJ program), the color intensity change (∆B) could be followed. A linear calibration, ∆B intensity = 0.365 [FA] + 6.988, R = 0.997, was obtained for 10-150 mM FA with LOD and LOQ at 3 and 10 mM, respectively (linear regression method). The precision was lower than 20% RSD. Application to real seafood samples was demonstrated. The ready-to-use sensor with the proposed method was cost-effective, was portable for on-site analysis, and demonstrated green chemical analysis.
提出了一种用于甲醛分析的新型可生物降解平台基传感器。天然胶乳被修饰为聚乳酸-氯乙酰化天然橡胶聚合物共混片。使用水基体系和胺单体作为平台对聚合物共混片进行接枝，在斑点上表现出正极性，用于固定阴离子染料（酸性红 27）。传感器暴露于甲醛中。传感器斑点上染料的颜色强度会降低。使用带有图像处理的智能手机（通过 ImageJ 程序），可以跟踪颜色强度变化（∆B）。对于 10-150mM FA，获得了线性校准，∆B 强度= 0.365 [FA] + 6.988，R = 0.997，LOD 和 LOQ 分别为 3 和 10mM（线性回归法）。精度低于 20%RSD。已证明该方法在真实海鲜样品中的应用。该即用型传感器具有成本效益，可用于现场分析，且演示了绿色化学分析。
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