Details

Autor(en) / Beteiligte

• Li, Zeyi
• Cao, Yunrui
• Feng, Tingyu
• Wei, Tingting
• Xue, Changhu
• Li, Zhaojie
• Xu, Jie

Titel

Nitrogen-doped carbon dots/Fe-based fluorescent probe for the "off-on" sensing of As() in seafood

Ist Teil von

• Analytical methods, 2023-04, Vol.15 (15), p.1923-1931

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. 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.