Synthesis of novel chitosan resin derivatized with serine diacetic acid moiety and its application to on-line collection/concentration of trace elements and their determination using inductively coupl
- 作者：Lukman Hakim ; Akhmad Sabarudin ; Mitsuko Oshima ; Shoji Motomizu
- 关键词：Chelating resin ; Chitosan ; Serine diacetic acid moiety ; Trace elements ; On-line pretreatment ; Computer control ; Inductively coupled plasma-atomic emission spectrometry ; SLRS-4
- 刊名：Analytica Chimica Acta
- 出版年：2007
- 期刊代码：2_00032670
- 类别：ch
- 出版时间：4 April 2007
- 卷：588
- 期：1
- 页码：73-81
- 文件大小：770 K
摘要
A novel chelating resin functionalized with serine diacetic acid moiety was synthesized by using chitosan as base material, and applied to the collection/concentration of trace elements in environmental water samples, followed by the determination using inductively coupled plasma-atomic emission spectrometer (ICP-AES). The synthesized resin, crosslinked chitosan serine diacetic acid (CCTS-SDA), showed good adsorption behavior toward trace amounts of Cd, Pb, Cu, Ni, V, Ga, Sc, In, and Th in a wide pH range. Additionally, rare earth elements also can be retained on the resin at neutral pH region. The adsorbed elements can be easily eluted with 1 mol L−1 of nitric acid, and their recoveries were found to be 90–100%. The CCTS-SDA was packed in a mini-column, which was then installed in a computer-controlled auto-pretreatment system (Auto-Pret System) for on-line trace elements collection and determination with ICP-AES. Experimental parameters which related to the improvement of sensitivity and reproducibility were optimized. The limits of detection (LOD) for 13 elements were found to be in sub-ppb level. The proposed method with CCTS-SDA resin was successfully applied to the determination of trace elements in river water samples. The method was validated by determining a certified reference material of river water, SLRS-4.