基于有孔壳层隔绝纳米粒子增强拉曼光谱的芥子气现场检测新方法

摘要

An on-site method for the determination of sulfur mustard ( SM) was developed based on pinhole shell-isolated nanoparticle-enhanced Raman spectroscopy. By using 0. 1 mol/L MgSO4 as effective agglomeration reagent, more Raman “hot spots” were induced, and thus a limit of detection for SM at 10 μg/L was achieved with a linearity of 10-1000 μg/L and an analytical enhanced factor of 1. 1×106. This method can be directly applied in the measurement of SM in environmental water samples with good sensitivity and reproducibility, and the standard addition recovery was between 88%-114%. Good differentiation of four SM related compounds, 2-chloroethyl ethylsulfide, thiodiglycol, bis-β-chloroethyl sulphoxide and bis-β-chloroethyl sulphone, was also obtained.%基于有孔壳层隔绝纳米粒子增强拉曼光谱技术,建立了一种快速便捷、高灵敏的芥子气及其相关物现场检测新方法。加入0.1 mol/L MgSO4可诱导纳米粒子有效团聚,形成多“热点”的拉曼散射,实现低至10μg/L芥子气的便携式拉曼光谱快速检测,线性范围为10~1000μg/L,分析增强因子约为1.1×106。本方法法直接应用于环境水样中微量芥子气的快速检测,回收率介于88%~114%之间。芥子气相关物(如2-氯乙基乙基硫醚、硫二甘醇、芥子亚砜和芥子砜)可得到有效区分。