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- W3094753413 abstract "A sensitive detection strategy for ascorbic acid (AA), using sodium alginate reduced/stabilized gold nanoparticles (SA-AuNPs) as the optical probe, is reported. The SA-AuNPs were prepared by mixing gold salt and SA under stirring for 2 h at room temperature, without any further steps. The mixture was aged at 4 °C overnight, after which a faint-purple colloidal solution of SA-AuNPs was obtained. Characterization shows that the synthesis is incapable of reducing all Au3+ to Au°, but rather to mixture of Au°/Au+. The addition of AA to the SA-AuNPs probe reduced completely all Au+ to new AuNPs which were deposited on the pre-formed SA-AuNPs seed, leading to size increment and absorption spectra enhancement. The assay exhibited a good linearity between 12.5 and 150.0 μM AA and low limit of quantification of 11.2 μM. It was further used for AA quantitation in vitamin C injection and fruit juice with satisfactory accuracy and precision." @default.
- W3094753413 created "2020-11-09" @default.
- W3094753413 creator A5027703144 @default.
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- W3094753413 date "2021-03-01" @default.
- W3094753413 modified "2023-10-15" @default.
- W3094753413 title "Sensitive colorimetric detection of ascorbic acid based on seed mediated growth of sodium alginate reduced/stabilized gold nanoparticles" @default.
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- W3094753413 doi "https://doi.org/10.1016/j.carbpol.2020.117376" @default.
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