一种用于固液萃取激光激发时间分辨光谱的新方法。

A novel approach for solid-liquid extraction laser-excited time-resolved Shpol'skii spectrometry.

机构信息

Department of Chemistry, North Dakota State University, Fargo, ND 58105-5516, USA.

出版信息

Talanta. 2002 Jul 19;57(6):1101-11. doi: 10.1016/s0039-9140(02)00198-4.

Abstract

A new procedure is presented for the analysis of polycyclic aromatic hydrocarbons by solid-liquid extraction (SLE) and laser-excited time-resolved Shpol'skii spectrometry (LETRSS). Microliters of Shpol'skii solvent are spiked on the surface of the extraction membrane and LETRSS is directly performed on the organic layer above the surface of the solid substrate. Fluorescence measurements are easily performed with a fiber-optic cell specifically designed for cryogenic measurements at 77 and 4.2 K. In comparison to the SLE-LETRSS procedure previously reported (Environ. Sci. Technol. 35 (2001) 2566), the spiking procedure eliminates the eluting step, reduces solvent consumption and improves limits of detection for at least one order of magnitude.

摘要

提出了一种新的通过固液萃取（SLE）和激光激发时间分辨光谱（LETRSS）分析多环芳烃的方法。将微升的 Shpol'skii 溶剂斑点在萃取膜的表面上，然后直接在固体基质表面上方的有机层上进行 LETRSS。荧光测量可以使用专门设计用于在 77 和 4.2 K 下进行低温测量的光纤池轻松进行。与之前报道的 SLE-LETRSS 方法相比（Environ. Sci. Technol. 35 (2001) 2566），该进样方法消除了洗脱步骤，减少了溶剂消耗，并将检测限提高了至少一个数量级。