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 coupled plasma-atomic emission spectrometry.
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.
Hakim
Lukman
L
Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan.
Sabarudin
Akhmad
A
Oshima
Mitsuko
M
Motomizu
Shoji
S
D000085:Acetates / Q000737:chemistry*; D000327:Adsorption; D000388:Air; D002614:Chelating Agents / Q000494:pharmacology; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D048271:Chitosan / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D012116:Resins, Plant / Q000737:chemistry; D045483:Rivers; D012694:Serine / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D014131:Trace Elements / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
D000085:Acetates; D002614:Chelating Agents; D012116:Resins, Plant; D014131:Trace Elements; D014874:Water Pollutants, Chemical; D012694:Serine; D048271:Chitosan