Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Department of Chemistry, Shandong University, Jinan 250100, China.
Talanta. 2013 Nov 15;116:14-7. doi: 10.1016/j.talanta.2013.04.056. Epub 2013 May 2.
Polybrominated diphenylethers (PBDEs), one of the most common brominated flame retardants, are toxic and persistent, generally detected by the chromatographic method. In this work, qualitative and quantitative detection of PBDEs were explored based on surface-enhanced Raman spectroscopy (SERS) technique using a portable Raman spectrometer. Alkanethiol modified silver nanoparticle aggregates were used as the substrate and PBDEs could be pre-concentrated close to the substrate surface through their hydrophobic interactions with alkanethiol. The effect of alkanethiols with different chain length on the SERS detection of PBDEs was evaluated. It was shown that 1-hexanethiol (HT) modified substrate has higher sensitivity, good stability and reusability. Qualitative and quantitative SERS detection of PBDEs in real sea water was accomplished, with the measured detection limits at 1.2×10(2) μg L(-1). These results illustrate SERS could be used as an effective method for the detection of PBDEs.
多溴二苯醚（PBDEs）是最常见的溴系阻燃剂之一，具有毒性和持久性，通常采用色谱法进行检测。本工作利用便携式拉曼光谱仪，基于表面增强 Raman 光谱（SERS）技术，探索了 PBDEs 的定性和定量检测方法。采用巯基己烷修饰的银纳米粒子聚集体作为基底，通过与巯基己烷的疏水相互作用，将 PBDEs 预浓缩至靠近基底表面。评估了不同链长的巯基己烷对 PBDEs 的 SERS 检测的影响。结果表明，1-己硫醇（HT）修饰的基底具有更高的灵敏度、良好的稳定性和可重复性。成功实现了真实海水中 PBDEs 的定性和定量 SERS 检测，测量的检测限为 1.2×10(2) μg L(-1)。这些结果表明，SERS 可用于 PBDEs 的检测。
