Determination of Lead Employing Simple Flow Injection AAS with Monolithic Alginate-Polyurethane Composite Packed In-Valve Column
Piyanat Issarangkura Na Ayutthaya,
Chonnipa Yeerum,
Kullapon Kesonkan,
Kanokwan Kiwfo,
Kate Grudpan,
Norio Teshima,
Hiroya Murakami,
Monnapat Vongboot
Affiliations
Piyanat Issarangkura Na Ayutthaya
Department of Chemistry, Faculty of Sciences, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
Chonnipa Yeerum
Department of Chemistry, Faculty of Sciences, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
Kullapon Kesonkan
Department of Chemistry, Faculty of Sciences, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
Kanokwan Kiwfo
Center of Excellence for Innovation in Analytical Science and Technology and Department of Chemistry, Faculty of Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
Kate Grudpan
Center of Excellence for Innovation in Analytical Science and Technology and Department of Chemistry, Faculty of Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
Norio Teshima
Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
Hiroya Murakami
Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
Monnapat Vongboot
Department of Chemistry, Faculty of Sciences, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
A simple flow injection FlameAAS for lead determination with an alginate-polyurethane composite (ALG-PUC) monolithic in-valve column has been developed. The ALG-PUC monolithic rod was prepared by mixing methylene diphenyl diisocyanate with polyol and sodium alginate with the ratio of 2:1:1 by weight for a 5 min polymerization reaction. It was then put into a column (0.8 cm i.d × 11 cm length) situated in a switching valve for the FI set up. A single standard calibration could be obtained by plotting the loaded µg Pb2+ vs. FI response (absorbances). The loaded µg Pb2+ is calculated: μg Pb2+ = FRload × LT × CPb2+, where the FR load is the flow rate of the loading analyte solution (mL min−1), LT is the loading time (min), and CPb2+ is the Pb2+ concentration (µg mL−1). A linear calibration equation was obtained: FI response (absorbances) = 0.0018 [µg Pb2+] + 0.0032, R2 = 0.9927 for 1–150 µg Pb2+, and RSD of less than 20% was also obtained. Application of the developed procedure has been demonstrated in real samples.
