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Lead Assays with Smartphone Detection Using a Monolithic Rod with 4-(2-Pyridylazo) Resorcinol

A monolithic rod of polyurethane foam-[4-(2-pyridylazo) resorcinol] (PUF-PAR) as a simple chemical sensor for lead assays with smartphone detection and image processing was developed. With readily available simple apparatus such as a plastic cup and a stirrer rod, the monolithic PUF rod was synthesi...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2021-09, Vol.26 (18), p.5720
Main Authors: Issarangkura Na Ayutthaya, Piyanat, Yeerum, Chonnipa, Kesonkan, Kullapon, Kiwfo, Kanokwan, Grudpan, Kate, Teshima, Norio, Murakami, Hiroya, Vongboot, Monnapat
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Language:English
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Summary:A monolithic rod of polyurethane foam-[4-(2-pyridylazo) resorcinol] (PUF-PAR) as a simple chemical sensor for lead assays with smartphone detection and image processing was developed. With readily available simple apparatus such as a plastic cup and a stirrer rod, the monolithic PUF rod was synthesized in a glass tube. The monolithic PUF-PAR rod could be directly loaded by standard/sample solution without sample preparation. A one-shot image in G/B value from a profile plot in ImageJ for a sample with triplicate results via a single standard calibration approach was obtained. A linear single standard calibration was: [G/B value] = -0.038[µg Pb ] + 2.827, R = 0.95 for 10-30 µg Pb with a limit of quantitation (LOQ) of 33 µg L . The precision was lower than 15% RSD. The proposed method was tested by an assay for Pb contents in drinking water samples from Bangkok. The results obtained by the proposed method agree with those of ICP-OES and with 100-120% recovery, demonstrating that the method is useful for screening on-site water monitoring.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26185720