Fluorescence sensor based on glutathione capped CdTe QDs for detection of Cr3+ ions in vitamins
In this work, glutathione capped CdTe QDs (GSH-QDs) were prepared through a one-pot process and found to be quenched by Cr3+, Ag+ and Cu2+ ions. Cr3+ and chromium (III) picolinate could be quantitatively measured after masking Cu2+ and Ag+ ions by sulfide. Under optimal conditions, linear quenching...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Tsinghua University Press
2018-03-01
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| Series: | Food Science and Human Wellness |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213453017301404 |
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| Summary: | In this work, glutathione capped CdTe QDs (GSH-QDs) were prepared through a one-pot process and found to be quenched by Cr3+, Ag+ and Cu2+ ions. Cr3+ and chromium (III) picolinate could be quantitatively measured after masking Cu2+ and Ag+ ions by sulfide. Under optimal conditions, linear quenching was observed for Cr3+ in the ranges of 0–2.0 μM and the limit of detection was 3.0 nM. The recoveries for Cr3+ in vitamin supplements obtained were from 92.5% to 106%. The determination results of chromium (III) picolinate in vitamin supplement samples were compared to that obtained using flame atomic absorption spectrometry (FAAS) method, and the result showed good reliability. Keywords: CdTe QDs, Fluorescence, Chromium ions, Vitamin supplements |
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| ISSN: | 2213-4530 |