Detection limit

Physics

Electron transfer

Engineering

Nuclear chemistry

Tap water

Organic chemistry

Chemistry

Metal ions in aqueous solution

Programming language

Mercury (programming language)

Antioxidant

Lipoic acid

Thioctic Acid

Computer science

Chromatography

Quantum mechanics

Photochemistry

Environmental engineering

Fluorescence

Food Chemistry

Mercury ions and thiophanate methyl (TM), are common contaminants present in the environment and food products. These contaminants cause neurovirulence and carcinogenicity effect on the human body. Herein, thioctic acid-carbon dots (SCDs) was synthesized and applied in a fluorescent “turn-off–on” probe to detect Hg2+ and TM. The presence of other common metal ions and pesticides did not affect the response of the developed sensor. Further investigation revealed that the fluorescent “turn-off–on” model were static, wherein the “turn-off” was induced by an electron transfer effect, while the “turn-on” was caused by the formation of TM-Hg complexes. Under optimal conditions, the fluorescence sensor method exhibited limits of detection as low as 33.3 nmol/L and 7.6 nmol/L for Hg2+ and TM, respectively. The developed sensor was designed to detect Hg2+ and TM in real tap water, grape juice and Citri Reticulatae Pericarpium (CRP) water samples.

A novel thioctic acid-carbon dots fluorescence sensor for the detection of Hg2+ and thiophanate methyl via S-Hg affinity