He Y, Lee H K
Department of Chemistry, National University of Singapore, Republic of Singapore.
Electrophoresis. 1997 Oct;18(11):2036-41. doi: 10.1002/elps.1150181126.
An analytical method based on the combination of solid-phase extraction (SPE) and field-amplified concentration (FAC), with micellar electrokinetic chromatography (MEKC) was developed to extract, concentrate, separate, and quantitate six organonitrogen pesticides (metribuzin, bromacil, terbacil, hexazinone, triadimefon, and DEET) in drainage water. The recovery of the first five pesticides was over 85%, and the limit of detection was 0.8 ppb. Four advantages (enhanced enrichment and recoveries, reduced extraction time and interferences) of combining SPE with FAC for trace analysis of pesticides at the ppb level were demonstrated.
开发了一种基于固相萃取（SPE）与场放大富集（FAC）相结合，并采用胶束电动色谱（MEKC）的分析方法，用于提取、浓缩、分离和定量排水中的六种有机氮农药（嗪草酮、除草定、特草定、嗪氨灵、三唑酮和避蚊胺）。前五种农药的回收率超过85%，检测限为0.8 ppb。结果表明，将SPE与FAC相结合用于痕量分析ppb级农药具有四个优点（增强富集和回收率、缩短萃取时间和减少干扰）。
