Nitrogen-doped carbon dots/Fe3+-based fluorescent probe for the "off–on" sensing of As(v) in seafood. Issue 15 (3rd April 2023)

• Record Type: Journal Article
• Authors: Li, Zeyi; Cao, Yunrui; Feng, Tingyu; Wei, Tingting; Xue, Changhu; Li, Zhaojie; Xu, Jie
• Is Part Of: Analytical methods. Volume 15:Issue 15(2023)
• Page Start: 1923
• Page End: 1931
• Publication Date: 2023-04-03
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/d2ay02098j
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : Based on the competition between the electron transfer effect of nitrogen-doped carbon dots (N–CDs)/Fe 3+ and the complexation reaction of As(v)/Fe 3+, an "off–on" fluorescence assay was developed to detect As(v) in complex food substrates. Abstract : To better satisfy the application of rapid detection methods in the detection of As(v ) in complex food substrates, we developed an "off–on" fluorescence assay to detect As(v ) based on the competition between the electron transfer effect of nitrogen-doped carbon dots (N–CDs)/Fe 3+ and the complexation reaction of As(v )/Fe 3+, using N–CDs/Fe 3+ as a fluorescence probe. Solid-phase extraction (SPE) was used to eliminate matrix interference during sample pretreatment. The detection limit was 7.6 ng g −1, with a linear range of 10–100 ng g −1 . The method was further used to determine As(v ) in different seafood products including snapper, shrimp, clams, and kelp. At the same time, the recovery of the method was validated by high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP/MS), indicating that the developed method had good recoveries from 86% to 117% and met the needs for accurate determination of As(v ). This approach has shown excellent application potential in the field of As(v ) detection in various seafood products.