JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2022
·
IF 5.141
Hong Li,Yang Zhou,Jianxiu Du
Ascorbic acid can serve as an efficient coreactant for luminol chemiluminescence (CL) reaction. An observable CL emission is produced when mixing ascorbic acid with luminol in an alkaline condition. The CL signal is further dramatically enhanced by cobalt(II) ions. This CL system was exploited as a new method for direct determination of ascorbic acid with a flow injection mode. A good linear response is acquired between the CL signal and ascorbic acid concentration in 5.0–1000.0 ng/mL range with a detection limit of 1.3 ng/mL. The relative standard deviations are 2.3% for intra–day (n = 11) and 3.7% for inter–day (n = 3) by parallel determination of 0.5 μg/mL ascorbic acid solution. The method has good selectivity for ascorbic acid since no obvious responses are observed for a variety of inorganic ions and biological substances. The practicability of the method has been demonstrated by the analysis of ascorbic acid in some soft drinks.
研究领域:
分析化学
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食品科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2014
·
IF 2.871
Yunqiao Gao,Meiling Wang,Xiongbo Yang,Qian Sun,Jianwei Zhao
A novel modified electrode based on polypyrrole (ppy) and single-walled carbon nanotubes (swcnts) was developed for the detection of quinoline yellow. It is prepared via a simple and convenient method. Cyclic voltammetry (CV) and square wave voltammetry (SWV) were used to confirm the successful stepwise assembly procedure of the sensor. Under the optimal conditions, the fabricated electrode exhibits excellent electrochemical activity toward the oxidation of quinoline yellow. The liner range is from 0.8 to 100 μM, and the detection limit is down to 0.08 μM. The modified electrode also showed good accuracy, stability and reproducibility, which might be attributed to particular properties of polypyrrole, single-walled carbon nanotubes and synergic interaction between them.
研究领域:
分析化学
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材料科学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
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2014
·Vol. 37
·期 16
·2248-2252
·
IF 2.594
Bingbing Sun,Li Qi,Minglin Wang
A capillary electrophoresis method for separating preservatives with various ionic liquids as the electrolyte additives has been developed. The performances for separation of the preservatives using five ionic liquids with different anions and different substituted group numbers on imidazole ring were studied. After investigating the influence of the key parameters on the separation (the concentration of ionic liquids, pH, and the concentration of borax), it has been found that the separation efficiency could be improved obviously using the ionic liquids as the electrolyte additives and tested preservatives were baseline separated. The proposed capillary electrophoresis method exhibited favorable quantitative analysis property of the preservatives with good linearity ( r 2 = 0.998), repeatability (relative standard deviations ≤ 3.3%) and high recovery (79.4–117.5%). Furthermore, this feasible and efficient capillary electrophoresis method was applied in detecting the preservatives in soft drinks, introducing a new way for assaying the preservatives in food products.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2017
·
IF 4.162
Zhenzhen Zhang,Jing Zhang,Yang Wang,Yao Tong,Lei Zhang
An extended one-step Stőber method was utilized for the preparation of core@shell spheres, which was made up of a thin layer of resorcinol-formaldehyde (RF) and a silica core. After the carbonization and template-removal process, hollow porous carbon spheres (HPCSs) were synthesized. The structure of HPCSs was characterized by scanning/transmission electron microscopy and N 2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy, energy dispersive X-ray spectrometer and Raman spectroscopy. The results showed that the silica cores were removed successfully and the HPCSs were in good sphere shape with uniform size, high surface areas as well as pores hollow framework structure. Compared with MWCNTs and 3D-graphene, HPCSs exhibited superior extraction ability for nine bisphenols (BPs). HPCSs showed extremely outstanding extraction efficiency for BPs as well as high adsorption capacity due to its hollow porous structure. It was applied as sorbent for the enrichment of nine BPs from environmental water samples and soft drinks prior to high performance liquid chromatographic (HPLC) analysis, obtaining recoveries ranged from 89.6% to 111.5% and the relative standard deviations (RSD) from 0.8% to 6.3%, and the limits of quantification (LOQs) were in the range of 0.183–1.763 μg L −1 .
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2016
·
IF 2.653
Yusheng Yuan,Xin Zhao,Man Qiao,Jinghui Zhu,Shaopu Liu,Jidong Yang,Xiaoli Hu
Fluorescent carbon dots was prepared by heating N -(2-hydroxyethyl)ethylene diaminetriacetic acid in air. The carbon dots were not only highly soluble in water but also uniform in size, and possessed strong blue fluorescence and excitation wavelength-dependent emission properties with the maximum excitation and emission wavelength at 366 nm and 423 nm, respectively. Food colorant sunset yellow whose excitation and emission wavelength at 303 nm and 430 nm could selectively quench the fluorescence of carbon dots, efficient fluorescent resonance energy transfer between the carbon dots and sunset yellow is achieved. This was exploited to design a method for the determination of sunset yellow in the concentration range from 0.3 to 8.0 μmol L − 1 , with a limit of detection (3 σ/k) of 79.6 nmol L − 1 . Furthermore the fluorimetric detection method was established and validated for sunset yellow in soft drinks samples with satisfactory results.
研究领域:
分析化学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
Food Analytical Methods
·
2016
·Vol. 10
·期 1
·200-209
·
IF 2.167
Yu Lanlan,Zheng Huijun,Shi Mengxing,Jing Shasha,Qu Lingbo
A new and sensitive electrochemical sensor for simultaneous determination of sunset yellow and tartrazine was constructed by poly (diallyldimethylammonium chloride) (PDDA)-dispersed graphene (Gr) and palladium nanoparticle (Pd NP) composite. The PDDA-Gr-Pd composite displayed good selectivity and high sensitivity to the targets, which were ascribed to the synergistic effect of the large surface area and good electron transfer efficiency of both Gr and Pd NPs. The electrochemical properties of sunset yellow and tartrazine on the modified electrode were investigated by cyclic voltammetry and differential pulse voltammetry. Under the optimum experimental conditions, the peak currents were linear with the concentrations of sunset yellow and tartrazine in the ranges of 0.01–10.0 and 0.05–8.0 μmol L −1 , respectively. The limit of detection (LOD) was 2.0 and 5.0 nmol L −1 for sunset yellow and tartrazine, respectively. The developed simple and sensitive method was successfully applied for simultaneous determination of sunset yellow and tartrazine in soft drinks with satisfactory results.
研究领域:
生物医学工程
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分析化学
·
食品安全检测
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纳米材料应用
·
电化学分析
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2015
·
IF 3.391
Meiling Wang,Yinlu Sun,Xiongbo Yang,Jianwei Zhao
Graphene oxide (GO) is a pH-dependent amphiphile. In this paper, it was found that carbon nanotubes (CNTs) can be highly dispersed in graphene oxide “water” with the aid of prototype ionic liquid of 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]). The introduction of [BMIM][PF 6 ] not only can minimize the defects of poor electrical conductivity of GO, but also can improve the dispersibility of CNT in water. Hence, a new composite of CNT/GO-[BMIM][PF 6 ] with high dispersibility and strong conductivity was presented for the first time and employed in the sensitive determination of Amaranth in soft drinks. The detection limit achieved (0.1 nM) is much lower than the guideline values in soft drinks. The ease of preparation, low background current, high sensitivity and stability can create novel avenues and applications for fabricating robust sensors for determination of other azo dyes in foods.
研究领域:
分析化学
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食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2015
·
IF 1.295
Jing Zhang,Shibo Zhang,Xue Wang,Wenchang Wang,Zhidong Chen
A convenient and sensitive method was developed for the simultaneous determination of Ponceau-4R and Allura Red using an ionic liquid modified expanded graphite paste electrode (IL-EGPE). The IL-EGPE was prepared by mixing ionic liquid-expanded graphite (IL-EG) composites with solid paraffin. Based on the advantageous functions of IL and EG, IL-EGPE showed enhanced electrocatalytic activity towards the simultaneous oxidation of Ponceau-4R and Allura Red. Under optimal experimental conditions, the IL-EGPE exhibited wide linear responses to Ponceau-4R and Allura Red ranging from 6.0 to 7.5 mg L−1 and 5.0 to 0.5 mg L−1, respectively. The detection limits for Ponceau-4R and Allura Red were 1.15 and 0.89 μg L−1 at a signal-to-noise ratio of 3, respectively. The designed electrode showed good reproducibility, stability and reusability. The proposed method was successfully applied in the simultaneous determination of Ponceau-4R and Allura Red in soft drinks. This method presented a simple, rapid and sensitive platform for simultaneous determination of Ponceau-4R and Allura Red and would become a versatile and powerful tool for food safety.
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
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2021
·
IF 4.556
Guangxin Lv,Beichen Shi,Hong Huang,Haodong Chen,Huajie Feng,Pan-Pan Zhou,Weichun Ye,Zhifei Zhang,Zhaoyong Yang
NiO nanoparticles (NPs) with small Ag NPs loading supported on reduced graphene oxide nanosheets (ternary NiO/Ag/RGO nanocomposites) were synthesized via a hydrothermal process followed by high-temperature calcination, extending the synergistic effects among noble metal, metal oxide and carbon materials. Based on ternary NiO/Ag/RGO nanocomposites, a new electrochemical sensor was fabricated for the detection of sunset yellow (SY) in soft drinks through cyclic voltammetry, Tafel plot and differential pulse voltammetry. The experimental conditions were optimized and kinetic parameters studied. Due to the synergistic effect of the ternary components, the prepared sensor exhibited superior electroanalytical performance toward SY detection, including wide linear range from 0.1 to 50 μM and from 50 to 450 μM, low detection limit of 13 nM, excellent specificity against various interfering colorants, good reproducibility and stability. Importantly, the electrochemical sensors was successfully employed for quantitative SY analysis in soft drinks with satisfactory recoveries, where the analyzed results were also in agreement with LC/MS analysis.
研究领域:
分析化学
·
材料科学
·
食品科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Weiwei Zheng,Wentao Tian,Xiaojun Liu,Qingquan Zhang,Chenghua Zong,Jia-Ping Lai,Wenfeng Zhao
Flexible surface-enhanced Raman scattering (SERS) substrates, specifically paper-based SERS substrates, are generally employed in many practical applications. However, paper-based SERS substrate quantitation is still challenging because of the inferior uniformity originating from the irregular morphology of the paper. The present study synthesized Ag nanoparticles (NPs) via the in situ photochemical reduction of Ag + ions on a titanium dioxide (TiO 2 ) film at the polyester fiber membranes (PFMs) surface. This generated many “hot spots” that presented significant SERS activity with an enhancement factor of 2.1 × 10 9 . Sodium saccharin (SS) bonded to the Ag NPs surface via the carbonyl oxygen and ring nitrogen atoms. A SERS sensor with photochemically deposited Ag NPs was prepared for the sensitive and rapid detection of SS in soft drinks with a limit of detection of 0.3 mg/L. The recovery rate ranged from 93% to 103%, indicating that this method is reliable in actual sample detection with simple pretreatment steps and can be potentially applied for the on-site detection of food additives for food safety.
研究领域:
材料科学
·
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Mengzhen Wang,Ling Ling,Shuyi Wang,Chuan-Fan Ding
Artificial sweeteners have been widely used as additives in various beverages. Due to the safety risks associated with artificial sweeteners, it is essential to develop a simple, rapid, and high-throughput method for the analysis of artificial sweeteners. Here, we report a homogeneous binary matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) assay for the simultaneous analysis of sweeteners including aspartame (ASP), neotame (NEO), and advantame (ADV) with a simple dilution step. The combination of nanodiamonds with 2,5-dihydroxybenzoic acid effectively improved the signal response of sweeteners, decreased the background noise, and improved the “spot-to-spot” repeatability. After the optimization, the method exhibits low limits of detection (ASP: 20 nΜ; NEO: 10 nΜ; ADV: 5 nΜ), good linearity ( r > 0.995), satisfactory accuracy (96.2–103.0%), and lower RSDs (1.5–5.8%). Finally, the target sweeteners in 17 soft beverages were successfully determined with this method, showing the potential for the routine analysis of artificial sweeteners.
研究领域:
分析化学
·
食品安全
·
质谱技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Muhammad Umar,Govinda Mandal,Rui Lv,Ruochen Guo,Shunli Yang,Gang Lang,M Awais,Kashmala Gul,M. Sajjad Hasan,Jian Liu
Accurate and sensitive detection of small biomolecules like saccharides in foods and beverages remains challenging due to their difficulty in ionization and the interferences of the fragments derived from the conventional organic matrices in laser desorption/ionization mass spectrometry (LDI-MS). Here, we present a methodology based on Bi2Te3 nanomatrix for LDI-MS, enabling the rapid, specific, and sensitive detection of saccharides such as glucose, 13C-glucose, trehalose, maltotetraose, and maltohexaose. The Bi2Te3 nanomatrix demonstrated efficient analytical performance compared to traditional organic matrices (CHCA and DHB) by reducing spectral interferences and enhancing detection specificity and sensitivity. A strong linear response (R2 = 0.9925) for glucose quantification was achieved, with a low limit of detection (LOD) of 0.25 µg/mL (1.39 pmol). This method was validated through glucose quantification in three commercial soft drinks: one sugar-labeled (soft drink-1) and two sugar-free (soft drinks 2 and 3). Glucose concentrations were 11.11%, 0.01%, and undetectable, with corresponding recovery rates of 107.52%, 73.04%, and 79.66%, respectively. This study provides insights for developing advanced LDI nanomatrices, designed for the specific and sensitive detection of small biomolecules in food and beverage products.
研究领域:
分析化学
·
纳米技术
·
质谱分析
·
食品科学
·
生物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）