Analytical Sciences

Determination of Cadmium in Water Samples by Liquid Electrode Plasma Atomic Emission Spectrometry after Solid Phase Extraction Using a Mini Cartridge Packed with Chelate Resin Immobilizing Carboxymethylated Pentaethylenehexamine

Shigehiro KAGAYA,*1 Saori NAKADA,*1 Yoshinori INOUE,*2 Waka KAMICHATANI,*2 Hideyuki YANAI,*2 Mitsuru SAITO,*2 Tamotsu YAMAMOTO,*3 Yuzuru TAKAMURA,*4 and Koji TOHDA*1

*1 Graduate School of Science and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
*2 R&D Marketing Division, Nippon Filcon Co. Ltd., 2220 Ohmaru, Inagi, Tokyo 206-8577, Japan
*3 Micro Emission Ltd., Ishikawa Create Lab, 2-13 Asahidai, Nomi, Ishikawa 923-1211, Japan
*4 School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

Solid phase extraction using a mini cartridge packed with 22 mg of chelate resin immobilizing carboxymethylated pentaethylenehexamine was successfully utilized for separation/preconcentration of cadmium in water samples prior to liquid electrode plasma atomic emission spectrometric (LEP-AES) determination. The combined method with the extraction and LEP-AES was applicable to the determination of cadmium in the certified reference materials (EU-L-1 wastewater and ES-L-1 groundwater); the detection limit was 0.20 μg in 200 mL of sample solution (500-fold preconcentration).

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