Determination of Lead Employing Simple Flow Injection AAS with Monolithic Alginate-Polyurethane Composite Packed In-Valve Column |
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| Authors: | Piyanat Issarangkura Na Ayutthaya Chonnipa Yeerum Kullapon Kesonkan Kanokwan Kiwfo Kate Grudpan Norio Teshima Hiroya Murakami Monnapat Vongboot |
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| Institution: | 1.Department of Chemistry, Faculty of Sciences, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand; (P.I.N.A.); (C.Y.); (K.K.);2.Center of Excellence for Innovation in Analytical Science and Technology and Department of Chemistry, Faculty of Sciences, Chiang Mai University, Chiang Mai 50200, Thailand;3.Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan; (N.T.); (H.M.) |
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| Abstract: | 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. |
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| Keywords: | lead(II) monolithic column alginate-polyurethane composite flow injection FlameAAS in-valve column |
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