Construction of an Optical Sensor for Copper Determination in Environmental, Food, and Biological Samples Based on the Covalently Immobilized 2-(2-benzothiazolylazo)-3-hydroxyphenol in Agarose

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2023 Aug 21

PMID 37601595

Authors

Mai Aish

Reem F Alshehri

Alaa S Amin

Affiliations

Soon will be listed here.

Abstract

An optical chemical sensor has been developed for the quantitative spectrophotometric analysis of copper. The optode is dependent on covalent immobilization of 2-(2-benzothiazolylazo)-3-hydroxyphenol (BTAHP) in a transparent agarose membrane. The absorbance variation of immobilized BTAHP on agarose as a film upon the addition of 5 × 10 M aqueous solutions of Mn, Zn, Hg, Cd, Pb, Co, Ni, Fe, La, Fe, Cr, Zr, Se, Th, and UO revealed substantially higher changes in the Cu ion content compared to other ions investigated here. The effects of various experimental parameters, such as the solution pH, the reaction time, and the concentration of reagents, on the quality of Cu sensing were examined. Under ideal experimental circumstances, a linear response was achieved for Cu concentrations ranging from 1.0 × 10 to 7.5 × 10 M with an value of 0.9988. The detection (3) and quantification (10) limits of the procedure for Cu analyses were 3.0 × 10 and 9.8 × 10 M, respectively. No observable interference was recorded in the detection of Cu due to other inorganic cations. With no indication of BTAHP leaching, the membrane demonstrated good durability and quick response times. The optode was effectively used to determine the presence of Cu in environmental water, food, and biological samples.

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PMID: 38946767 PMC: 11211978. DOI: 10.1039/d4ra03854a.

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