摘要
固体和液体中的金属离子能在含有有机螯合剂的超临界二氧化碳 (SC CO2 )流体中被有效地萃取出来。超临界流体萃取 (SFE)金属离子的效率取决于下列因素 :螯合剂在SC CO2 中的稳定性和溶解性、金属络合物在SC CO2 中的溶解度、水、pH值、压力。
Metal species in solid and liquid materials can be extracted by supercritical CO 2 containing organic ligands. This supercritical fluid extraction (SFE) technique converts charged metal species into neutral complexes which become soluble in CO 2. The efficiency of metal extraction using the in situ chelation SFE method depends on the following factors: stability and solubility of ligand, solubility of metal chelate, water, pH, temperature, pressure, chemical form of metal species and matrix. Several different types of chelating agents including dithiocarbamates, β diketones, organophosphorus reagents and macrocyclic compounds have been tested for their ability to extract heavy metals, lanthanides and actinides from different matrices.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2004年第8期1110-1115,共6页
Chinese Journal of Analytical Chemistry
关键词
超临界流体萃取
金属离子
环境分析
螯合剂
Supercritical fluid extraction, metal chelates, carbon dioxide, review
