Wang Jing, Zhang Dongmei, Lawson Thomas R, Bartsch Richard A
Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA.
Talanta. 2009 Apr 30;78(2):477-83. doi: 10.1016/j.talanta.2008.11.038. Epub 2008 Dec 3.
Silica gel-immobilized, di-ionizable calix[4]arenes are employed as stationary phases in ion-exchange chromatography for selected heavy metal ions. Sorption efficiencies for Pb(2+) are dependent on the structure of the calix[4]arene ligand and the linker that joins the ligand to the silica gel, as well as the acidity of the sample solution. Although the resins exhibit only poor sorption of Cd(2+), they are found to be scavengers for Hg(2+). Competitive sorption studies are conducted with selected resins.
硅胶固定的、可双离子化的杯[4]芳烃被用作离子交换色谱中选定重金属离子的固定相。Pb(2+)的吸附效率取决于杯[4]芳烃配体的结构、连接配体与硅胶的连接基以及样品溶液的酸度。尽管这些树脂对Cd(2+)的吸附能力较差，但它们被发现是Hg(2+)的清除剂。对选定的树脂进行了竞争性吸附研究。
