化学
杂质
表面增强拉曼光谱
拉曼光谱
试剂
吸附
分子
光谱学
分析化学(期刊)
纳米技术
光化学
色谱法
有机化学
拉曼散射
物理
材料科学
光学
量子力学
作者
Si‐Qi Pan,Peng Luo,Jia Chen,Tairui Wu,Bin Xu,Fushan Chen,De‐Yin Wu,Bin Ren,Guokun Liu,Jianwei Xie,Pengxiang Xu,Tian Zhang
标识
DOI:10.1021/acs.analchem.3c02683
摘要
Reagent purity is crucial to experimental research, considering that the ignorance of ultratrace impurities may induce wrong conclusions in either revealing the reaction nature or qualifying the target. Specifically, in the field of surface science, the strong interaction between the impurity and the surface will bring a non-negligible negative effect. Surface-enhanced Raman spectroscopy (SERS) is a highly surface-sensitive technique, providing fingerprint identification and near-single molecule sensitivity. In the SERS analysis of trace chloromethyl diethyl phosphate (DECMP), we figured out that the SERS performance of DECMP is significantly distorted by the trace impurities from DECMP. With the aid of gas chromatography-based techniques, one strongly interfering impurity (2,2-dichloro-N,N-dimethylacetamide), the byproduct during the synthesis of DECMP, was confirmed. Furthermore, the nonignorable interference of impurities on the SERS measurement of NaBr, NaI, or sulfadiazine was also observed. The generality ignited us to refresh and consolidate the guideline for the reliable SERS qualitative analysis, by which the potential misleading brought by ultratrace impurities, especially those strongly adsorbed on Au or Ag surfaces, could be well excluded.
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