Abstract
A simple and rapid positive–negative colorimetric approach to determine the presence of antimony ions based on the use of gold nanoparticles conjugated with oligonucleotide (poly-A sequence) is developed. Colorimetric measurements reveal that the aggregates of modified gold nanoparticles were afforded after adding antimony ions, thus changing the solution color from pink to blue. The results of aptamer’s interaction on the gold nanoparticle surface with the target analyte can be detected either by photometry or by the naked eye. The realized assay provides rapid (2 min), sensitive (detection limit 10 ng/mL), specific, and precise (variation coefficient less than 3.8%) detection of antimony (III) in drinking water.
Highlights
IntroductionAntimony pollution is of increasing interest because of its wide use in various industries including semiconducting [1]
Heavy metals are a class of highly toxic pollutants that can affect human health and the environment.Antimony pollution is of increasing interest because of its wide use in various industries including semiconducting [1]
To determine the presence of Sb3+ ions, the thiolated poly-A oligonucleotide (PAO) was conjugated with gold nanoparticles (GNPs) via the strong Au–S bond
Summary
Antimony pollution is of increasing interest because of its wide use in various industries including semiconducting [1]. Antimony occurs in different forms in environmental water as a result of the oxidation of sulfide minerals and dissolution by water [2]. Permissible levels, and mechanisms of interaction with biological materials remain poorly understood. To answer these questions, Filella et al showed its binding by iron oxide phases [3]. Filella et al showed its binding by iron oxide phases [3] In this case, compounds of antimony have a valency of 5. Due to rock disruptions and increased consumption by industry, antimony can be emitted into the environment [4].
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