摘要
原位络合的超临界萃取技术开辟了超临界二氧化碳（ＳＣ－ＣＯ２）萃取金属离子的新途径。本文综述国外有关ＳＣ－ＣＯ２萃取环境样品中金属离子的原理、流程、应用及影响因素等方面的研究进展，并相信随着研究工作的不断深入，更加理想的络合剂和ＳＣ－ＣＯ２携带剂的发现。
There have been several recent studies that have demonstrated the feasibility of extracting metal ions from environment matrices by in situ chelation using a SCCO2 mobile phase that had been saturated with a nonpolar complexing agent. Development about the recovery of metal ions by SCCO2 extraction is reviewed, including the basic principles, experimental system and methods, application and factors affecting the extraction. The paper finally point out that the success of researching more perfect ligand and more suitable modifier will offer a more board prospect for preconcentration of trace matals for analytical purpose and in seperated process including toxic metal treatment from environmental matrices.
关键词
超临界流体萃取
二氧化碳
金属离子
环境样品
supercritical fluid extraction (SFE)
supercritical carbon dioxide (SCCO2)
metal ions
complex
in situ chelate.
