Novel "on-off" fluorescence sensing for rapid and accurate determination of Cr3+ based on g-CNQDs.
RSC Adv
; 13(41): 28550-28559, 2023 Sep 26.
Article
en En
| MEDLINE
| ID: mdl-37780737
ABSTRACT
Cr3+ is one of the most essential trace elements in living organisms and plays a vital role in human metabolism. However, both deficiency and excess intake of Cr3+ can be harmful to the human body. Therefore, the quantitative determination of Cr3+ is of great significance in the field of life science. Based on this, in this study, a g-CNQDs@p-acetaminophenol fluorescence sensing system was developed for the quantitative detection of Cr3+ in actual complex samples. G-CNQDs were synthesized with sodium citrate and urea as precursors. The fluorescence signal was enhanced by the synergistic effect between p-acetaminophenol (APAP) and g-CNQDs. The fluorescence quenching phenomenon can be produced when Cr3+ is introduced into the fluorescence-enhanced g-CNQDs@p-acetaminophenol system. An "on-off" fluorescence sensing system was constructed based on g-CNQDs@p-acetaminophenol for the quantitative detection of Cr3+. The experimental data showed a wide linear region in the concentration range of 0.64-63.0 µM, and the detection limit was as low as 0.23 µM. The construction of the sensor system broadens the research field for the practical application of Cr3+.
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Colección:
01-internacional
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MEDLINE
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En
Revista:
RSC Adv
Año:
2023
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Article