Colorimetric detection of phosphate-based on iron complexing catechol-displacement assay in eutrophicated water bodies

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management Pub Date : 2023-02-09 DOI:10.1016/j.enmm.2023.100792

Rafaqat Naveen , Abdul Niaz , Muhammad Iqbal Zaman , Shahanzeb Khan , Abdur Rahim , Asma Zulfiqar , Muhammad Tariq , Tawfik. A. Saleh , Diogo M. F. Santos , Mabkhoot Alsaiari

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Abstract

A simple, sensitive, and inexpensive colorimetric indicator-displacement assay based on Fe³⁺-catechol complex has been developed to determine PO₄^3-. The Fe³⁺ and catechol formed a greenish color complex, upon the addition of PO₄^3- to the complex, it exhibited a visual color change immediately from greenish to colorless along with UV–vis spectral change. This change was mainly attributed to the high binding affinity of PO₄^3- with Fe³⁺ by displacing catechol from the Fe³⁺-catechol complex. The developed sensor showed good sensitivity for the determination of PO₄^3- in a wide linear range from 2 − 1000 µM with a limit of detection (LOD) of 0.5 µM which was found to be lower than the permissible limit. The sensor presented good selectivity towards the detection of PO₄^3- in the existence of other potential interfering anions. Furthermore, the method was successfully applied to determine PO₄^3- in eutrophicated water bodies (river and lake water) with good recoveries and without showing any significant matrix effect.

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富营养化水体中基于铁络合儿茶酚置换法的磷酸盐比色检测

建立了一种简单、灵敏、廉价的基于Fe3+-邻苯二酚络合物的比色指示剂置换法测定PO43-。Fe3+和邻苯二酚形成了一种绿色复合物，在复合物中加入PO43-后，随着紫外-可见光谱的变化，其视觉颜色立即从绿色变为无色。这种变化主要归因于PO43-通过从Fe3+-邻苯二酚络合物中取代邻苯二酚而与Fe3+具有高结合亲和力。所开发的传感器在2−1000µM的宽线性范围内对PO43的测定显示出良好的灵敏度，检测限（LOD）为0.5µM，低于允许限。在存在其他潜在干扰阴离子的情况下，该传感器对PO43-的检测具有良好的选择性。此外，该方法已成功应用于富营养化水体（河水和湖水）中PO43-的测定，回收率高，没有显示出任何显著的基质效应。

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来源期刊

Environmental Nanotechnology, Monitoring and Management Environmental Science-Water Science and Technology

CiteScore

13.00

自引率

0.00%

发文量

132

审稿时长

48 days

期刊介绍： Environmental Nanotechnology, Monitoring and Management is a journal devoted to the publication of peer reviewed original research on environmental nanotechnologies, monitoring studies and management for water, soil , waste and human health samples. Critical review articles, short communications and scientific policy briefs are also welcome. The journal will include all environmental matrices except air. Nanomaterials were suggested as efficient cost-effective and environmental friendly alternative to existing treatment materials, from the standpoints of both resource conservation and environmental remediation. The journal aims to receive papers in the field of nanotechnology covering; Developments of new nanosorbents for: •Groundwater, drinking water and wastewater treatment •Remediation of contaminated sites •Assessment of novel nanotechnologies including sustainability and life cycle implications Monitoring and Management papers should cover the fields of: •Novel analytical methods applied to environmental and health samples •Fate and transport of pollutants in the environment •Case studies covering environmental monitoring and public health •Water and soil prevention and legislation •Industrial and hazardous waste- legislation, characterisation, management practices, minimization, treatment and disposal •Environmental management and remediation