Application of modi¿ed nano-alumina as a solid phase extrac tion sorb ent for the preco ncentration and sim ultaneous separati on of Cu, Cd and Z n in water to flame atomic abs orption spectrometr y determ ination

nanom eter-sized alumina has high surface area, high sorption capacity and high che mical activity, it could be successfully applied for the separ ation and pr econcentration of trace metal ions in environmental samples. Chemical activatio n of the na nometer-siz ed alumina with functional groups containing N, S, and O atoms i s highly ef¿cient for the sorption of several metal ions. Metal chelates co uld provide higher sele ctivity and high enrichment factors for such a preconcentration and s eparation. Recent studies on the use of surfactan t-coated mineral oxide columns for SPE have demonstrated these new sorbent materials to be a promising tool for th e extraction/preconcentration of organic compounds in a wide polarity range [۱-۳]. For these purposes, w e have developed nano -sized alum ina coated with SDS a nd new org anic ligand (a), as a new and effective sorbent for the pre concentrati on and dete rmination of Cd, Cu and Zn by FA AS in real sa mples with satisfactory results.

کلیدواژه ها:

Solid phase extra ction ، Nano alumina ، Pr econcentration