Determination of melamine in milk based on β-cyclodextrin modified carbon nanoparticles via host–guest recognition

Liao, Xiufen; Chen, Congjin; Shi, Panpan; Yue, Lizhou

doi:10.1016/j.foodchem.2020.127769

Cited by 27 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of this strong adsorption, the melamine molecules aggregated onto the surface of CNNS and generated aggregation‐induced luminescence at 450 nm. [ 22,38 ]…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Highly sensitive and selective detection of melamine in dairy products by turn‐on fluorescence of ultrathin graphitic carbon nitride nanosheets

Liu

2021

Luminescence

View full text Add to dashboard Cite

There is an important and realistic need to develop a practical sensor for melamine in dairy products that is highly sensitive and selective. However, the complicated composition and environment in milk necessitate the use of a stable luminophore as the sensor, as well as excellent photophysical properties. Here, ultrathin graphitic carbon nitride nanosheet (CNNS) was prepared by successive thermal polymerization and acid exfoliation. The photophysical properties of CNNS include its strong ultraviolet absorption and intense blue‐light emission. Notably, CNNS could act as a chemo‐sensor to detect trace melamine in dairy products. The high stability, eminent sensitivity, powerful selectivity, and competitiveness all substantiate the findings that this CNNS luminophore is a promising sensor for melamine in dairy products, and has potential practical value for monitoring milk quality.

show abstract

“…Because of this strong adsorption, the melamine molecules aggregated onto the surface of CNNS and generated aggregation‐induced luminescence at 450 nm. [ 22,38 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 19 ] To date, several chemosensors for melamine based on fluorescence technology have been successfully developed. [ 20–23 ] However, the complicated environment and composition during detection have severely interfered with the sensing behaviour.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive and selective detection of melamine in dairy products by turn‐on fluorescence of ultrathin graphitic carbon nitride nanosheets

Liu

2021

Luminescence

View full text Add to dashboard Cite

show abstract

“…The above experimental results and theoretical analysis show that Ln-d-DBTA in the asprepared film has strong adsorption to melamine molecules, which makes melamine aggregate on the surface of the film and thereafter generate aggregation-induced luminescence at 441 nm. 57,58 To further prove this conclusion, the fluorescence spectra of melamine with different aggregation levels were tested. As the concentration increases, melamine gradually changes from dissolution to aggregation.…”

Section: Methodsmentioning

confidence: 93%

Luminescence-Color-Changing Sensing toward Melamine Based on a White-Light-Emitting Film

Sun

Zhao

et al. 2021

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Isostructural lanthanide coordination polymers, [Ln(d-DBTA)(d-HDBTA)(H2O)5] n (Ln-d-DBTA; d-H2DBTA = d-O,O′-dibenzoyl tartaric acid; Ln = La, Ce, Nd, Eu, Gd, and Tb), are synthesized and characterized. By uniformly doping this amphophilic Ln-d-DBTA into a poly(methyl methacrylate) (PMMA) matrix, we prepare stable films with tunable luminescence color, even white-light emission. Except for providing the blue-light component, the PMMA matrix plays indispensable roles in dispersing the 1D LnCPs via hydrogen bonds, transferring electrons to organic ligands by means of photoinduced electron transfer, and further sensitizing the luminescence of lanthanide ions. Then, a bifunctional sensing process toward melamine in various dairy products is conducted in terms of luminescent intensity and color. Consequently, the as-prepared white-light-emitting film exhibits 0.012 mg/kg limit of detection and obvious luminescence-color changes from white to blue. The excellent sensitivity, reliability, selectivity, stability, competitiveness, and recyclability state the promising practicality in monitoring quality of dairy products. In this work, using a battery of experimental techniques and theoretical calculation, we show how the PMMA matrix connects the LnCPs and promotes their photophysical properties, what changes have taken place for the energy- and electron-transfer pathways of the as-prepared chemosensor after adsorbing melamine, and why this convenient testing material is applicable.

show abstract

“…The structure obtained by FTIR spectroscopy for β-CD, PA, PA-CD, CS, and CS-PA-CD were presented in Figure 1. In Figure 1a, the β-CD spectrum showed several characteristic peaks, a peak at 3401 cm −1 related to the stretching vibration of -OH groups and the peak at 2925 cm −1 associated with the stretching vibrations of -CH groups [37]. The rest peaks at 1411 cm −1 (-OH bending), 1157 cm −1 (C-O-C bending), and 1029 cm −1 (C-O-C stretching), were also characteristic peaks of β-CD.…”

Section: Physical Properties Of Cs-pa-cd Nanoparticlesmentioning

confidence: 99%

Preparation and Characterization of Food-Grade Pickering Emulsions Stabilized with Chitosan-Phytic Acid-Cyclodextrin Nanoparticles

Qiu

et al. 2022

Foods

View full text Add to dashboard Cite

This study aimed to fabricate food-grade Pickering emulsions stabilized by chitosan-phytic acid-β-cyclodextrin (CS-PA-CD) nanoparticles. The CS-PA-CD nanoparticles were characterized with FITR, XRD, and TGA to prove its successfully crosslinking, then characterized by DLS system and scanning electron microscopy showing the smallest average particle size was 434.2 ± 2.5 nm and it increased with the ratio of PA-CD to CS increasing. Pickering emulsions stabilized by CS-PA-CD nanoparticles was prepared and it showed the best stability at around pH 6. The particle concentration higher than 1.0% (w/v) and the oil fraction above 0.5% (v/v) could reach the emulsion stability. In addition, the Pickering emulsions were stable at various temperature (30–70 °C) and influenced by the certain change of ionic strength (0–500 mM). These CS-PA-CD Pickering emulsions showed great application in the formation of functional foods and pharmaceutical industries.

show abstract

Determination of melamine in milk based on β-cyclodextrin modified carbon nanoparticles via host–guest recognition

Cited by 27 publications

References 35 publications

Highly sensitive and selective detection of melamine in dairy products by turn‐on fluorescence of ultrathin graphitic carbon nitride nanosheets

Highly sensitive and selective detection of melamine in dairy products by turn‐on fluorescence of ultrathin graphitic carbon nitride nanosheets

Luminescence-Color-Changing Sensing toward Melamine Based on a White-Light-Emitting Film

Preparation and Characterization of Food-Grade Pickering Emulsions Stabilized with Chitosan-Phytic Acid-Cyclodextrin Nanoparticles

Contact Info

Product

Resources

About