NANO
·
2015
·
IF 1.09
Desheng Xi,Xiaojuan Deng,Huijun Li,Pei Yao
Allura red (AR) is a water-soluble synthetic colorant often used as an additive in the food industry, but excess AR can be harmful to human health. In this work, we report the development of a new removal method for AR by using amino-functionalized microspheres with Fe 3 O 4 cores and twolayer shells composed of SiO 2 particles and perpendicularly aligned mesoporous SiO 2 (designated Fe 3 O 4 @nSiO 2 @mSiO 2 –NH 2 ). The material exhibits good dispersibility in aqueous solutions and a high saturation magnetization of 45.68 emu g − 1 , and can be magnetically separated efficiently with an external magnet. Importantly, the material has great adsorption capacity of 29.6 mg g − 1 for AR and the capacity for reuse with a simple treatment. The adsorption process is very fast and the kinetics data are consistent with a pseudo-second order model. Based on these, a rapid and efficient method for extraction and analysis of AR in water and soft drinks has been established.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
MOLECULAR BIOLOGY REPORTS
·
2014
·Vol. 41
·期 5
·3381-3391
·
IF 1.958
Wang Langhong,Zhang Guowen,Wang Yaping
Allura red (AR) is a widely used colorant in food industry, but may have a potential security risk. In this study, the properties of interaction between AR and human serum albumin (HSA) in vitro were determined by fluorescence, UV–Vis absorption and circular dichroism (CD) spectroscopy combining with multivariate curve resolution–alternating least squares (MCR–ALS) chemometrics and molecular modeling approaches. An expanded UV–Vis data matrix was resolved by MCR–ALS method, and the concentration profiles and pure spectra for the three reaction components (AR, HSA, and AR–HSA complex) of the system were then successfully obtained to evaluate the progress interaction of AR with HSA. The calculated thermodynamic parameters indicated that hydrogen binding and hydrophobic interactions played major roles in the binding process, and the interaction induced a decrease in the protein surface hydrophobicity. The competitive experiments revealed that AR mainly located in Sudlow’s site I of HSA, and this result was further supported by molecular modeling studies. Analysis of CD spectra found that the addition of AR induced the conformational changes of HSA. This study have provided new insight into the mechanism of interaction between AR and HSA.
研究领域:
食品科学
·
生物化学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2016
·
IF 1.088
Xingxiu Qin,Xiashi Zhu
Novel solid phase extraction using an α-picoline ionic liquid-β-cyclodextrin-cross-linked polymer is reported with high-performance liquid chromatography for the determination of allura red. The linear dynamic range, limit of detection, limit of quantitation, and relative standard deviation values were 5.0–2.5 × 104 µg L−1, 0.35 µg L−1, 1.17 µg L−1, and 0.47%, respectively. The preconcentration factor of method was approximately fourteen, and the α-picoline based ionic liquid-β-cyclodextrin polymer may be used for up to thirteen times. The mechanism of adsorption was investigated by kinetic modeling and the inclusion interaction of the ionic liquid-β-cyclodextrin-cross-linked polymer with allura red was characterized. This method was employed for the determination of allura red in food with satisfactory results.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Lanlan Yu,Mengxing Shi,Xiu Yue,Lingbo Qu
A novel and sensitive electrochemical sensor for allura red determination was developed based on poly (diallyldimethylammonium chloride) (PDDA) functionalized graphene (Gr) and nickel nanoparticles (Ni) composite (PDDA-Gr-Ni). Allura red displayed remarkably increased electrochemical activity on PDDA-Gr-Ni composite modified electrode due to the synergistic effect of the large surface area and improved electron transfer efficiency of both Gr and Ni nanoparticles, which offers the feasibility for highly sensitive determination of allura red by electrochemistry method. The electrochemical properties of allura red on the modified electrode were investigated by cyclic voltammetry and differential pulse voltammetry. Under the optimum experimental conditions, the peak current of allura red was proportional to its concentration in the range of 0.05–10.0 μmol L −1 and the limit of detection (LOD) was 8.0 nmol L −1 . This simple and sensitive sensor was successfully applied to determine allura red in real sample, which provides an operational access to allura red detection in the field of food safety control.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
FOOD AND CHEMICAL TOXICOLOGY
·
2022
·
IF 5.572
Ke Zhang,Hui Zeng,Jingyu Feng,Zhengkun Liu,Zhenyu Chu,Wanqin Jin
Allura red (AR) is a member of azo dyes is commonly used as an additive in foods and soft drinks. However, due to the special harm of the azo structure to the human body, the dosage control of AR becomes particularly necessary. The present detection methods are time-consuming, expensive and complicated. In order to address the above issues, a core-shell nanocubes constructed sensor has been developed to determine the ultrawide detection range and selective recognition of AR with a long-term reusability. The core-shell architecture is composed of carbon material of 12.64 nm thickness covering 600 nm Mn 3 O 4 nanocube. This nanocomposite combines the advantages of Mn 3 O 4 @C, possessing high electrocatalysis and chemical stability. As confirmed in using sports drinks as real samples, the as-prepared AR sensor exhibites excellent selectivity with an ultra-wide linear range from 0.1 to 1748.4 μM, and meanwhile, this sensor can also meet the requirements of remarkable anti-interference and reusability over 30 days.
研究领域:
材料科学
·
分析化学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 6
·H321
·
IF 3.266
Meiling Wang,Jianwei Zhao
A facile electrochemical sensor was fabricated via highly dispersing Multi-walled carbon nanotubes (MWCNTs) in ionic liquid-graphene oxides (IL-GO) "water" at room temperature. The introduction of IL (1-butyl-3-methylimidazolium hexafluorophosphate) to GO water resulted in the high dispersibility of MWCNTs and also caused fast electron transfer rates of the three dyes of Ponceau 4R (E124), Tartrazine (E102) and Allura red (E129) at the IL-GO-MWCNT composites modified glassy carbon electrode (IL-GO-MWCNT/GCE). Well-separated oxidation peaks and enhanced peak currents of Ponceau 4R, Allura red, and Tartrazine were observed at the IL-GO-MWCNT modified GCE. For individual detection, the linear responses of Ponceau 4R, Allura red, and Tartrazine were in the concentration ranges of 1.0 × 10−9-1.0 × 10−6, 8.0 × 10−10-5.0 × 10−7, and 1.0 × 10−8-1.0 × 10−6 mol L−1 with detection limits of 8.0 × 10−10, 5.0 × 10−10, and 7.0 × 10−9 mol L−1 (S/N = 3), respectively. For simultaneous determination by synchronous change of the concentrations of Ponceau 4R, Allura red, and Tartrazine, the linear response ranges were 8.0 × 10−9-1.5 × 10−7, 5.0 × 10−9-4.5 × 10−7 and 2.0 × 10−8-1.3 × 10−7 mol L−1 with the detection limits of 6.0 × 10−9, 3.0 × 10−9, and 1.0 × 10−8 mol L−1 (S/N = 3), respectively. The fabricated sensors were further applied for the detection of Ponceau 4R, Allura, red and Tartrazine in alcoholic beverages.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）