Development of fluorescence sensor and test paper based on molecularly imprinted carbon quantum dots for spiked detection of domoic acid in shellfish and lake water

Wang, Linjie; Wen, Lejuan; Zhao, Liping; Chao, Jie; Tao, Feifei; Wang, Fei; Li, Caolong

doi:10.1016/j.aca.2022.339515

Cited by 34 publications

(4 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, the buffer solution plays a vital role in fluorescence analysis, which furnishes stable and accurate detection conditions by sustaining the pH and ionic strength at constant values [ 28 ]. In this research, the carbonate buffer solution served as the system buffer solution, considering it was the frequently used alkaline buffer solution.…”

Section: Resultsmentioning

confidence: 99%

A Rapid Fluorescence Sensor for the Direct Quantification of Rongalite in Foodstuffs

Chen

Huang

et al. 2022

Foods

View full text Add to dashboard Cite

Rongalite was reported illegally used as a food additive for bleaching purposes and improving the tenderness of foodstuffs, which may endanger public health. At present, rongalite was mostly detected by indirect methods via derivatization or determining its decomposition products. In this study, we developed a new fluorescence sensor for the direct quantification of rongalite based on the principles: (1) dopamine reacts with resorcinol and generates strong fluorophore (azamonardine); (2) rongalite could inhibit the production of fluorophores and then result in lower fluorescence intensity. Hence, the rongalite concentration was inversely proportional to fluorescence intensity of fluorophore. Several crucial reaction conditions of fluorescence sensor were further optimized, such as dopamine and resorcinol concentration, pH values, and reaction time. Under the optimal conditions, the limit of detection of fluorescence sensor was 0.28–0.38 μg/g in vermicelli, wheat and rice powder samples, exhibiting almost 3.5-fold improvement compared to that of lateral flow immunoassay. Moreover, the detection time was substantially decreased to 20 min. The recoveries in spiked samples were 80.7–102.1% with a coefficient of variation of less than 12.6%. In summary, we developed a direct, high throughput, selective and accurate fluorescence sensor that poses a promising application for the rapid detection of rongalite in foodstuffs.

show abstract

Section: Resultsmentioning

confidence: 99%

A Rapid Fluorescence Sensor for the Direct Quantification of Rongalite in Foodstuffs

Chen

Huang

et al. 2022

Foods

View full text Add to dashboard Cite

show abstract

“…Excessive levels of domoic acid (DA) in edible shellfish and water bodies would be life-threatening. Wang et al [85] prepared CQDs@MIPs with APTES and TEOS for the specific detection of DA.…”

Section: Molecular Imprinting Templatementioning

confidence: 99%

Advances in carbon quantum dot technology for food safety: preparation, modification, applications and mechanisms

Sun,

Cheng,

et al. 2024

Nano Ex.

View full text Add to dashboard Cite

Functionalized carbon quantum dots (CQDs) show great potential for application in the field of food safety by combining their use with other technologies. CQDs are good candidates in this regard due to the wide range of sources of raw materials for their synthesis, and their good biocompatibility and stable fluorescence. This paper analyses the properties of CQDs and compares them with those of conventional semiconductor quantum dots. It analyses the similarities and differences between hydrothermal carbonization, pyrolysis and microwave-assisted synthesis of CQDs, and reviews the principles and methods of functionalization of CQDs through surface modification and doping. Finally, it discusses the applications of functionalized CQDs in food safety, such as detection and sensing, bio-inhibition and photocatalytic degradation, and the mechanisms of detection.

show abstract

“…Fluorescent carbon dot nanoparticles have the advantage of biocompatibility, simple and tunable functionality, excellent photostability, and inexpensive manufacturing. − They characterized by their broad applications including drug delivery, bioimaging, solar energy conversion, photocatalysis, optoelectronics, and chemical sensors . They have a benefit over semiconductors in that they are less harmful to the environment .…”

Section: Introductionmentioning

confidence: 99%

Optical Detection of Acetone Using “Turn-Off” Fluorescent Rice Straw Based Cellulose Carbon Dots Imprinted onto Paper Dipstick for Diabetes Monitoring

et al. 2022

View full text Add to dashboard Cite

Persistent bad breath has been reported as a sign of serious diabetes health conditions. If an individual’s breath has a strong odor of acetone, it may indicate high levels of ketones in the blood owing to diabetic ketoacidosis. Thus, acetone gas in the breath of patients with diabetes can be detected using the current easy-to-use fluorescent test dipstick. In another vein, rice straw waste is the most well-known solid pollutant worldwide. Thus, finding a simple technique to change rice straw into a valuable material is highly important. A straightforward and environmentally friendly approach for reprocessing rice straw as a starting material for the creation of fluorescent nitrogen-doped carbon dots (NCDs) has been established. The preparation process of NCDs was carried out via one-pot hydrothermal carbonization using NH 4 OH as a passivation substance. A testing strip was developed on the basis of cellulose CD nanoparticles (NPs) immobilized onto cellulose paper assay. The NCDs demonstrated a quantum yield of 23.76%. A fluorescence wavelength was detected at 443 nm upon applying an excitation wavelength of 354 nm. NCDs demonstrated remarkable selectivity for acetone gas as their fluorescence was definitely exposed to quenching by acetone as a consequence of the inner filter effect. A linear correlation was observed across the concentration range of 0.5–150 mM. To detect and measure acetone gas, the present cellulose paper strip has a “switch off” fluorescent signal. A readout limit was accomplished for an aqueous solution of acetone as low as 0.5 mM under ambient conditions. The chromogenic fluorescence of the cellulose assay responsiveness depends on the fluorescence quenching characteristic of the cellulose carbon dots in acetone. A thin fluorescent cellulose carbon dot layer was deposited onto the surface of cellulose strips by a simple impregnation process. CDs were made using NP morphology and analyzed using infrared spectroscopy and transmission electron microscopy. The carbon dot distribution on the paper strip was evaluated by scanning electron microscope and energy-dispersive X-ray analysis. The absorption and fluorescence spectral analyses were investigated. The paper sheets’ mechanical qualities were also examined.

show abstract

Development of fluorescence sensor and test paper based on molecularly imprinted carbon quantum dots for spiked detection of domoic acid in shellfish and lake water

Cited by 34 publications

References 56 publications

A Rapid Fluorescence Sensor for the Direct Quantification of Rongalite in Foodstuffs

A Rapid Fluorescence Sensor for the Direct Quantification of Rongalite in Foodstuffs

Advances in carbon quantum dot technology for food safety: preparation, modification, applications and mechanisms

Optical Detection of Acetone Using “Turn-Off” Fluorescent Rice Straw Based Cellulose Carbon Dots Imprinted onto Paper Dipstick for Diabetes Monitoring

Contact Info

Product

Resources

About