Visual detection of multiple antioxidants based on three chloroauric acid/Au-Ag nanocubes
| Autor: | Siqun Li, Xinjie Yu, Zhengbo Chen, Li Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Antioxidant
medicine.medical_treatment Relative standard deviation Metal Nanoparticles Nanochemistry 02 engineering and technology Urine 01 natural sciences Antioxidants Analytical Chemistry Absorbance chemistry.chemical_compound Chlorides Limit of Detection medicine Humans Valence (chemistry) 010401 analytical chemistry 021001 nanoscience & nanotechnology Gold Compounds 0104 chemical sciences Visual detection chemistry Chloroauric acid Colorimetry Gold 0210 nano-technology Nuclear chemistry |
| Zdroj: | Microchimica Acta. 188 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-021-04774-5 |
| Popis: | A colorimetric sensing method is described for discrimination of multiple antioxidants based on core-shell Au@Ag nanocubes (NCs). In order to extract data-rich colorimetric responses from the sensor array, three different concentrations of chloroaurate acid (HAuCl4) were employed as sensing elements. Interestingly, Au3+ ions can be reduced to different valence states (i.e., Au(0) and Au(I)) by different antioxidants, and thus effectively inhibit the oxidation etching process of Au@Ag NCs by Au(III) ions to varying extents, generating diverse colorimetric responses (color and absorbance). This enables identification of the six antioxidants at 10 nM via linear discriminant analysis (LDA) with relative standard deviation (RSD) of 2.52% (n = 3). The discrimination ability of the sensor array was further evaluated in antioxidant binary and multicomponent mixtures. Remarkably, identification of these six antioxidants spiked in urine was realized with 100% of accuracy. |
| Databáze: | OpenAIRE |
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