Abstract
Highly stable, small-sized and evenly distributed solid mercury nanoparticles capped with ibuprofen (Ibu-HgNPs) were prepared via reduction with hydrazine and capped with ibuprofen as a stabilizing agent. Characterization of Ibu-HgNPs was carried out by UV-Vis spectrophotometry and transmission electron microscopy (TEM). The prepared Ibu-HgNPs were immobilized onto a glassy carbon electrode (GCE) and used for the first time as the sensing element for voltammetric determination of low concentrations of acrylamide (AA) in aqueous solutions. Various parameters such as the type of supporting electrolyte, voltammetric mode, frequency, deposition time, stirring rate and initial potential were optimized to obtain the highest peak current of AA. The sensor delivered the best results in combination with the square wave voltammetry (SWV) mode, with good repeatability (relative standard deviation (RSD) of 25 repetitions was 1.4% for 1000 ppb AA). The study further revealed that Ibu-HgNPs are strongly adhered to GCE and hence do not contaminate the environment even after several runs. The newly developed AA sensor provides linear calibration dependence in the range of 100–1300 ppb with an R2 value of 0.996 and limit of detection (LOD) of 8.5 ppb. Negligible interference was confirmed from several organic compounds, cations and anions. The developed sensor was successfully applied for AA determination in various types of environmental real water samples to prove its practical usefulness and applicability.
Highlights
Introduction published maps and institutional affilAcrylamide (AA) is an industrially important hydrophilic organic compound applied globally to produce polyacrylamide (PAA), which is used in various fields
According to the International Agency for Research on Cancer (IARC), AA and its epoxide metabolites are toxic to reproductive system, neurotoxic and carcinogenic [1,2,3,4]
Several methods have been reported so far for AA determination including liquid chromatography with pulsed electrochemical detection (LC ED) [5], ion exclusion liquid chromatography coupled with diode array detection (LC–DAD) [6], gas chromatography with electron capture iations
Summary
Introduction published maps and institutional affilAcrylamide (AA) is an industrially important hydrophilic organic compound applied globally to produce polyacrylamide (PAA), which is used in various fields (e.g., as flocculent and coagulant agent, as grouting agent for water pipes, tunnels, cosmetics, plastics, paper and textile industries and in the form of a solid support for proteins’ separation via electrophoresis). Several methods have been reported so far for AA determination including liquid chromatography with pulsed electrochemical detection (LC ED) [5], ion exclusion liquid chromatography coupled with diode array detection (LC–DAD) [6], gas chromatography with electron capture iations.
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