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Aqueous synthesis of CdTe/CdSe core/shell quantum dots as pH-sensitive fluorescence probe for the determination of ascorbic acid.

PubMed
Authors: Yang SS, Ren CL, Zhang ZY, Hao JJ, Hu Q, Chen XG

Year

2011

Paper ID

12340

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

111

Citations

47

Abstract

By controlling the reflux time and the quantity of the shell materials, different sizes of thioglycollic acid (TGA) modified CdTe/CdSe core/shell quantum dots were synthesized in aqueous solution. This type of QDs was used for sensitive and selective determination of ascorbic acid in commercial tablets. Under optimal conditions, a good linearity was observed between the relative fluorescence (FL) intensity and the concentration of ascorbic acid in the range of 4.0 to 64.0 μg/mL with a correlation coefficient of 0.9968. The limit of detection was 2.4 μg/mL. This method was applied to the determination of the ascorbic acid in Vitamin C tablets and Vitamin C Yinqiao pills, and satisfactory results were obtained.

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  • By controlling the reflux time and the quantity of the shell materials, different sizes of thioglycollic acid (TGA) modified CdTe/CdSe core/shell quantum dots were synthesized...

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References & Citation Signals

[1] DOI https://doi.org/10.1007/s10895-010-0788-9 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/21161344/

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