使用混合溶剂和表面活性剂测定不同亲水性化合物抗氧化能力的电位计。

IF 1.8 4区 化学 Q3 CHEMISTRY, ANALYTICAL Analytical Sciences Pub Date : 2024-09-10 DOI:10.1007/s44211-024-00662-z
Elena Salimgareeva,Violetta Starcheusova,Elena Gerasimova,Daria Gordeeva,Alla Ivanova
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引用次数: 0

摘要

在这项研究中,首次使用电位法测定了不同亲水性化合物在混合溶剂和表面活性剂共同存在下的抗氧化能力(AOC)。以抗坏血酸和α-生育酚为例,分别测定了不同亲水性抗氧化剂模型溶液在磷酸盐缓冲液-表面活性剂和混合溶剂-表面活性剂介质中的抗氧化能力。结果表明,在选定的条件下,表面活性剂 Triton X-100 能够增溶 α-生育酚,从而获得可重复的准确结果,并且对 K3[Fe(CN)6]/K4[Fe(CN)6] 体系的平衡速率影响较小。磷酸盐缓冲液-乙醇和磷酸盐缓冲液-乙腈与 Triton X-100(5 mmol/dm3)的比例为 3:2 作为分析条件(RSD ≤ 6%)。在磷酸盐缓冲液-乙醇中测定的浓度范围为 (0.006-0.5) m mmol/dm3,在磷酸盐缓冲液-乙腈中测定的浓度范围为 (0.006-0.3) m mmol/dm3。在选定的介质中测定了原料输液的 AOC。结果与著名的 Folin-Ciocalteu 分析法呈正相关。
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Potentiometry in determining the antioxidant capacity of compounds of different hydrophilicity in the joint presence using mixed solvents and surfactants.
In this work, for the first time, the potentiometric method was used to determine the antioxidant capacity (AOC) of compounds of different hydrophilicity in the joint presence using mixed solvents and surfactants. The AOC of model solutions of antioxidants of different hydrophilicity was determined separately and in the joint presence in the media of phosphate buffer-surfactant and mixed solvents-surfactant, using as an example the ascorbic acid and the α-tocopherol. It was shown that the surfactant Triton X-100 is able to solubilize α-tocopherol under the selected conditions, allows to obtain reproducible and accurate results, and has less effect on the equilibrium rate of the K3[Fe(CN)6]/K4[Fe(CN)6] system. Phosphate buffer-ethanol and phosphate buffer-acetonitrile media in the 3:2 ratio with Triton X-100 (5 mmol/dm3) were chosen as the analysis conditions (RSD ≤ 6%). The range of determined concentrations was (0.006-0.5) m mmol/dm3 in phosphate buffer-ethanol and (0.006-0.3) m mmol/dm3 in phosphate buffer-acetonitrile. AOC of raw materials infusions was determined in selected media. The positive correlation with the well-known Folin-Ciocalteu assay was obtained.
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来源期刊
Analytical Sciences
Analytical Sciences 化学-分析化学
CiteScore
2.90
自引率
18.80%
发文量
232
审稿时长
1 months
期刊介绍: Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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