JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2019
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IF 3.571
Leqi Cui,Peiyi Shen,Zili Gao,Jianhua Yi,Bingcan Chen
Salt, most often sodium chloride (NaCl), is commonly used in a variety of food emulsions. However, little is known about the detailed mechanism of how NaCl influences the lipid oxidation and thus the shelf life of those products. In this study, we report a new mechanism through which NaCl could help inhibit the lipid oxidation of sodium dodecyl sulfate (SDS)-stabilized oil-in-water (O/W) emulsions. Results showed that NaCl significantly lowered the critical micelle concentration (CMC) of SDS, which further led to greater amounts of lipid hydroperoxides being solubilized by SDS micelles into the aqueous phase of emulsion. NaCl also altered the distribution of δ-tocopherol between the aqueous and oil phase of emulsion. Such changes of the physical locations of lipid hydroperoxides and δ-tocopherol were responsible for the improved oxidative stability of NaCl-added O/W emulsions in the absence or presence of δ-tocopherol.
研究领域:
食品科学
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化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2016
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IF 5.267
Zhenkang Li,Zhiping Wang,Qiwei Yang,Zhiguo Zhang,Yiwen Yang,Qilong Ren,Huabin Xing
Ionic liquid (IL)-mediated extraction methods have drawn much attention due to their reduced environmental impact and improved extraction efficiencies compared to traditional separation methods. However, one long-standing challenge in the application of IL-based extraction processes is the difficulty in recovering high-boiling solutes from the IL phase due to the negligible vapor pressure of ILs and the strong interaction between solutes and ILs. In this study, a new CO2-assisted back-extraction method was developed for the recovery of high-boiling solutes from the IL phase based on the reversible chemical absorption and/or strong physical interaction of CO2 with ILs. We found the distribution coefficient (D) of the typical solute δ-tocopherol in the [P4444][Pro]/DMSO–hexane biphasic system significantly decreased from 10.38 to 2.42 after the introduction of CO2, which greatly reduced the required solvent consumption and the number of back-extractions required for tocopherol recovery. For example, the number of back-extractions required for the recovery of 90% of the tocopherols from the [P4444][Pro]/DMSO–hexane biphasic phase decreased from 24 to 5 with the aid of CO2 absorption, along with a decrease in solvent consumption by approximately 80%. The effects of the structure of the IL, the loading of CO2, the type of cosolvents, and the temperature of the CO2-assisted back-extraction processes were investigated in this study. This proof-of-concept study demonstrates the great potential of CO2-assisted back-extraction as a green method for the efficient recovery of high-boiling solutes from the IL phase.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
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2025
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IF 1.8
Yufeng Zhao,Dan Huang,Xiangyu Wang,Baijun Chu,Yuxiu Wen,Qi Li,Xiuzhu Yu
The variations in tocopherols and phytosterols during the oxidation of walnut oils (Wen-185, Xiangling, and Dama oils) were analyzed, and their antioxidant effects were compared. Under both ambient temperature and accelerated oxidation conditions, the degradation order of tocopherols in walnut oils was α-tocopherol > γ-tocopherol > δ-tocopherol. Phytosterols exhibited less degradation than tocopherols under both oxidation conditions, and tocopherols were more strongly associated with oil oxidation than phytosterols. When δ-tocopherol degradation reached 15%–20%, the peroxide value approached 20 meq/kg, highlighting its potential as an indicator of oil oxidation. Further studies on the antioxidant effectiveness of tocopherols revealed that the optimal effect was achieved as 400 mg/kg α-tocopherol was added at Day 16 under ambient temperature. These findings suggested that δ-tocopherol can serve as an indicator of walnut oil oxidation, and appropriately timed and dosed α-tocopherol supplementation can significantly delay oxidation in walnut oils. Practical Applications : This study compared the changes and degradation of tocopherols and phytosterols in different walnut oils. The results suggested that tocopherol degraded faster than phytosterol, with a closer correlation to oil oxidation, and α-tocopherol underwent degradation preferentially. Furthermore, the antioxidant effectiveness of tocopherols was analyzed. The results showed that proper quantity and timing of α-tocopherol addition can enhance antioxidant effect, and δ-tocopherol can assess the oxidation of walnut oils as an concomitant indicator. This study has expanded the application of endogenous concomitants in the antioxidant properties of walnut oils. It has laid a theoretical foundation for the antioxidant properties of walnut oils.
研究领域:
食品化学
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油脂科学
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抗氧化研究
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食用油
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氧化稳定性
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2021
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IF 4.556
Liumin Huang,Jun Li,Yanlan Bi,Yanhui Xu,Yanmei Wang,Jian Wang,Dan Peng
A simple and fast normal-phase high performance liquid chromatography method for simultaneous detection of α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol, sesamin, sesamolin, sesamol, and asarinin in sesame oil (SO) was investigated. Conditions were a silica gel column as the separation unit, n -hexane and tetrahydrofuran (93:7, v/v) as the mobile phase, isocratic elution, a flow rate of 0.8 mL/min, column temperature of 30 °C, and florescence detector with excitation and emission wavelengths of 295 and 330 nm. SO samples were directly dissolved in n -hexane for HPLC analysis. Results showed that the method performed wide linear ranges and good linearity (0.27–100.0 μg/mL, R 2 > 0.9996), low limits of detection (0.09–0.16 μg/mL) and quantification (0.27–0.41 μg/mL), good precision and accuracy (biases of <2.83 % and relative standard deviations of <3.77 %), good separation performance [resolution factor (1.66–6.20), separation factor (1.11–3.94), retention factor (1.08–1.42), and height of theoretical plates (0.01–0.04 mm)], and satisfactory recoveries (87.3–109.8 % for SO and 96.5–106.9 % for lard). The method was successfully applied for the simultaneous determination of the eight analytes in eleven SO samples.
研究领域:
食品科学
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分析化学
✓ 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）