Analytical method using surface enhanced Raman spectroscopy and composition for the method
申请人:JOHNSON MATTHEY PUBLIC LIMITED COMPANY
公开号:US10365223B2
公开(公告)日:2019-07-30
An identification method, for determining whether a sample of an unknown composition is a sample of a known composition to which a known amount of a SERS-active taggant compound has been added, includes the steps of: obtaining a sample of the unknown composition; adding to the composition a plurality of SERS particles to form a mixture, each SERS particle including:—a core including a nanoparticle having a plasmonic surface,—a SERS-active internal standard compound adjacent the plasmonic surface and,—a shell, the shell encapsulating the core and the SERS-active internal standard compound; obtaining a SERS spectrum from the mixture; and comparing the SERS response ratio SATC:SAISC from the SERS spectral response of the SERS-active taggant compound and the SERS spectral response of the SERS-active internal standard compound in the unknown composition with the SERS response ratio SATC:SAISC from the known composition.
一种用于确定未知组合物样品是否为已知组合物样品的鉴定方法,其中已知量的SERS活性标记化合物已被添加到该组合物中,该方法包括以下步骤:获取未知组合物样品;向该组合物中添加多个SERS颗粒以形成混合物,每个SERS颗粒包括:-核心,包括具有等离子体表面的纳米颗粒;-邻近等离子体表面的SERS活性内部标准化合物;-外壳,外壳封装核心和SERS活性内部标准化合物:-核心,包括具有质子表面的纳米粒子,邻近质子表面的 SERS 活性内标化合物,以及外壳,外壳封装核心和 SERS 活性内标化合物;从混合物中获取 SERS 光谱;比较 SERS 响应比 SATC、SAISC 和 SERS 光谱:将未知组合物中 SERS 活性标记化合物的 SERS 光谱响应和 SERS 活性内标化合物的 SERS 光谱响应的 SERS 响应比 SATC:SAISC 与已知组合物的 SERS 响应比 SATC:SAISC 进行比较。