Colorimetric captopril assay based on oxidative etching-directed morphology control of silver nanoprisms.

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ID: 86002
2020
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Abstract
Oxidative etching is an effective approach to control the morphology of nanomaterials. Taking silver nanocrystals (AgNCs) as an example, oxidative etching-directed morphological transformation from a triangular prism shape to a disk shape is achieved and then applied to the determination of captopril. As a mediator, trace amount of halides play important roles in the shape-controlled evolution of AgNCs. Etching causes the color of the triangular silver nanoprims (AgNPRs) to change from blue to yellow on formation of round nanodisks. On addition of captopril, the oxidative etching of the AgNPRs is prevented owing to the protection by the drug via Ag-S bonding. In this case, the solution color does not change. This finding was used to design an assay of captopril that has a linear response in the 10-600 nM concentration range and a 2 nM limit of detection. This method also allows digital camera read-out. It was successfully applied to quality control of captopril in tablets. Graphical abstractOxidative etching-directed morphological transformation of silver nanocrystals is well manipulated and successfully applied in colorimetric determination of captopril in tablets.
Reference Key
zhang2020colorimetricmikrochimica Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhang, Pu;Wang, Li;Zeng, Jing;Tan, Juan;Long, Yunfei;Wang, Yi;
Journal Mikrochimica acta
Year 2020
DOI
10.1007/s00604-019-4071-8
URL
Keywords
hypertension smartphone metal nanoparticles pharmaceutical analysis localized surface plasmon resonance peak shift

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