Determination of lead employing simple flow injection AAS with monolithic alginate-polyurethane composite packed in-valve column
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Author list: Ayutthaya P.I.N., Yeerum C., Kesonkan K., Kiwfo K., Grudpan K., Teshima N., Murakami H., Vongboot M.
Publisher: MDPI
Publication year: 2021
Journal: Molecules (1420-3049)
Volume number: 26
Issue number: 15
Start page: 4397
ISSN: 1420-3049
eISSN: 1420-3049
Languages: English-Great Britain (EN-GB)
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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 FRload is the flow rate of the loading analyte solution (mL min−1), LT is the loading time (min), and CPb 2+ 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. © 2021 by the authors.Licensee MDPI, Basel, Switzerland.
Keywords
Alginate-polyurethane composite, FlameAAS, Flow injection, In-valve column, Lead(II), Monolithic column
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