Analytical Letters ( IF 1.6 ) Pub Date : 2021-06-07 , DOI: 10.1080/00032719.2021.1932969 Samuel M. Mugo 1 , Weihao Lu 1
Abstract
A phytoplankton derived nanoporous biogenic silica (BS) scaffold grafted with polymethacrylate β-estradiol molecularly imprinted polymers (MIP) film (MIP@BS) is reported as a selective platform for the determination of β-estradiol using surfaced-enhanced Raman scattering (SERS). The biogenic silica nanoparticles provided high surface area support for the MIP while serving as an active signal enhancement substrate for SERS. The MIP@BS platform demonstrated an excellent linear response (R2 = 0.9996) between 0.1 and 4 ng/mL of β-estradiol standards. The limit of detection (LOD) for the MIP@BS SERS sensor for β-estradiol was 0.073 ng/mL. The MIP@BS SERS sensors were successfully evaluated for the determination of β-estradiol in milk, while demonstrating good stability and reusability.
中文翻译:
使用纳米多孔生物二氧化硅上的表面印迹甲基丙烯酸酯聚合物通过表面增强拉曼光谱 (SERS) 测定 β-雌二醇
摘要
据报道,一种用聚甲基丙烯酸酯β-雌二醇分子印迹聚合物(MIP@BS)接枝的浮游植物衍生的纳米多孔生物二氧化硅(BS)支架作为表面增强拉曼散射(SERS)测定β-雌二醇的选择性平台. 生物源二氧化硅纳米粒子为 MIP 提供了高表面积支持,同时作为 SERS 的活性信号增强底物。MIP@BS 平台在 0.1 和 4 ng/mL β-雌二醇标准品之间表现出出色的线性响应 (R 2 = 0.9996)。MIP@BS SERS 传感器对 β-雌二醇的检测限 (LOD) 为 0.073 ng/mL。MIP@BS SERS 传感器已成功评估用于测定牛奶中的 β-雌二醇,同时表现出良好的稳定性和可重复使用性。