Highly sensitive fluorometric method based on nitrogen-doped carbon dot clusters for tartrazine determination in cookies samples

Abstract

Nitrogen-doped carbon nanodots (CDs) were prepared via the solvothermal method, using urea and triethylene glycol as the starting materials. The as-prepared CDs had individual diameters of approximately 100 nm and were in clusters of different sizes. The surface composition and optical properties of the as-prepared CDs were characterized. They exhibited multicolor emission properties in the visible range when excited with a wide wavelength range. The aqueous solution of the CDs was used in highly sensitive tartrazine determination. The fluorescence quenching of the CDs was in a linear relationship with the concentrations of tartrazine in the range of 0.5-30.0 µ M. The detection limit of the assay was 0.18 µ M. Acceptable recovery results were obtained via spike-recovery experiments on cookie samples.

Recent advancements in nanomaterial based optical detection of food additives: a review

“…Recently, CDs synthesized from urea and triethylene glycol have been reported for tartrazine detection in cookie samples with a detection limit of 0.18 μM based on a similar mechanism in the linear range of 0.5–30.0 μM. 132 Also, photoluminescent thin films of nitrogen modified CDs (NCDs) dispersed in a 3-D network of microfibrillated cellulose (MFC) and polyvinyl alcohol (PVA) were reported recently for the detection of tartrazine based on fluorescence quenching. 133 The fluorescence of NCD/MFC/PVA films is quenched in the presence of the dye which can be further analyzed using smart-phone based software for quantitation purposes.…”

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

“…The major factors influencing the synthesis of CDs include molecular state, surface state, as well as the quantum confinement effects, and these factors can be easily controlled by altering the strategies for CDs' synthesis [85][86][87][88]. During the synthesis of CDs, several functional groups such as amine, epoxy, ether, carbonyl, carboxyl, hydroxyl, etc., can be incorporated [53,69].…”