A rapid fluorescence detecting platform: applicable to sense carnitine and chloramphenicol in food samples

RSC Advances ◽  
2014 ◽  
Vol 4 (109) ◽  
pp. 64112-64118 ◽  
Author(s):  
Ming-Hui Wang ◽  
Jiun-An Gu ◽  
Veerappan Mani ◽  
Yung-Chao Wu ◽  
Yu-Jen Lin ◽  
...  
Keyword(s):  
Coenzyme A ◽  
Food Samples ◽  
Long Wavelength ◽  
Sensitive Determination

A new long-wavelength latent florescent probe, termed “BCC” for sensitive determination of coenzyme A, carnitine and chloramphenicol.

Electrocatalysis and Sensitive Determination of Sudan I at Fe3O4/Graphene Modified Glassy Carbon Electrodes

2013 ◽  
Vol 401-403 ◽  
pp. 775-778
Author(s):  
Su Xing Luo ◽  
Yuan Hui Wu ◽  
Hua Gou
Keyword(s):  
Iron Oxide ◽  
Detection Limit ◽  
Electrochemical Method ◽  
Food Samples ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes ◽  
Sudan I ◽  
Anodic Peak Current ◽  
Sensitive Determination

The iron oxide/graphene (Fe3O4/rGO) nanocomposite modified electrode and the electrochemical properties of Sudan I were investigated. It was found the anodic peak current of Sudan I was linear with the concentration of Sudan I from 0.008 μM to 6 μM with a detection limit of 0.0005 μM (S/N=3). The regression equation was: Ipa (μA)=-0.8151-0.9651c (μM), R=0.9934. It was convenient and excellent sensitive electrochemical method for Sudan I determination. This electrochemical method was successfully applied to determine Sudan I in food samples.

scholarly journals Melamine Recognition: Molecularly Imprinted Polymer for Selective and Sensitive Determination of Melamine in Food Samples

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Mohadese Biabani ◽  
Azizollah Nezhadali ◽  
Ahmad Nakhaei ◽  
Hossein Nakhaei
Keyword(s):  
Limit Of Detection ◽  
Electrochemical Techniques ◽  
Food Samples ◽  
Quantitative Measurements ◽  
Sensitive Determination ◽  
Burman Design ◽  
Mip Sensor ◽  
Optimized Conditions ◽  
Plackett Burman Design

In this study, a sensitive and selective sensor is constructed to measure the melamine (MEL) using molecular imprinting polymer (MIP) technique. Chemical and electrochemical techniques are used to construct the MIP and quantitative measurements. The constructed sensor was modified with GO-Fe3O4@SiO2 nanocomposite. Screening and optimization of factors are done using statistical methods, including Plackett–Burman design (PBD) and central composite design (CCD). Under the optimized conditions, an MIP sensor showed a linear range from 5.0 × 10−7 to 1.0 × 10−5 M MEL concentration with a correlation coefficient (R2) of 0.9997. The limit of detection was obtained (0.028 µM) with a highly reproducible response (RSD 2.15%, n = 4). The electrochemical sensor showed good results for the determination of MEL in food samples.

A nanosilver-based spectrophotometry method for sensitive determination of tartrazine in food samples

2013 ◽  
Vol 138 (2-3) ◽  
pp. 1239-1242 ◽  
Author(s):  
R. Sahraei ◽  
A. Farmany ◽  
S.S. Mortazavi
Keyword(s):  
Food Samples ◽  
Sensitive Determination

Long-wavelength emission carbon dots as self-ratiometric fluorescent nanoprobe for sensitive determination of Zn2+

2022 ◽  
Vol 189 (2) ◽  
Author(s):  
Yanling Lv ◽  
Peihua Li ◽  
Chao Liu ◽  
Lian Xia ◽  
Fengli Qu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Long Wavelength ◽  
Fluorescent Nanoprobe ◽  
Wavelength Emission ◽  
Sensitive Determination

Sensitive determination of herbicides in food samples by nonaqueous CE using pressurized liquid extraction

2007 ◽  
Vol 28 (20) ◽  
pp. 3606-3616 ◽  
Author(s):  
Rita Carabias-Martínez ◽  
Encarnacion Rodríguez-Gonzalo ◽  
Edith Miranda-Cruz ◽  
Javier Domínguez-Álvarez ◽  
Jesus Hernández-Méndez
Keyword(s):  
Food Samples ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Sensitive Determination

scholarly journals A White Light Reflectance Spectroscopy Label-Free Biosensor for the Determination of Fungicide Carbendazim

Proceedings ◽  
2020 ◽  
Vol 60 (1) ◽  
pp. 45
Author(s):  
Georgios Koukouvinos ◽  
Chrysoula-Evangelia Karachaliou ◽  
Sotirios Kakabakos ◽  
Evangelia Livaniou
Keyword(s):  
White Light ◽  
Reflectance Spectroscopy ◽  
Food Samples ◽  
Environmental Pollutant ◽  
Label Free ◽  
Reliable Determination ◽  
Light Reflectance ◽  
Sensitive Determination

Carbendazim is a broad-spectrum benzimidazole-type fungicide effective against fungi that compromise the safety/quality of food products. Despite its potential usefulness, carbendazim constitutes a major environmental pollutant, being hazardous for humans and animals; therefore, reliable determination of carbendazim levels in water, soil, and food samples remains a highly desirable analytical goal. Herein, an optical (white light reflectance spectroscopy, WLRS) label-free biosensor for fast and sensitive determination of carbendazim is presented. The transducer is a SiO2/Si chip, on which a suitable benzimidazole-conjugate has been immobilized; determination is based on the competitive immunoassay format: A mixture of an in-house developed anti-carbendazim antibody with the calibrators/samples is pumped over the chip, followed by biotinylated secondary antibody and unlabeled streptavidin. The WLRS platform allows for real-time monitoring of biomolecular interactions carried out onto the SiO2/Si chip by transforming the shift in the reflected interference spectrum caused by the immunoreaction to effective biomolecular adlayer thickness. The sensor is capable of detecting carbendazim levels within 28 min (LoD: 20 ng/mL; intra- and inter-assay CVs: ≤6.9% and ≤9.4%, respectively). Excellent analytical characteristics and short analysis time combined with its small size render the proposed WLRS biosensor ideal for future point-of-need determination of carbendazim in food and environmental samples.

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