Comparison between ultra‐homogenisation and ultrasound for extraction of phenolic compounds from teff (Eragrostis tef (Zucc.)),International Journal of Food Science & Technology

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Comparison between ultra‐homogenisation and ultrasound for extraction of phenolic compounds from teff (Eragrostis tef (Zucc.))
International Journal of Food Science & Technology ( IF 2.6 ) Pub Date : 2020-01-26 , DOI: 10.1111/ijfs.14523
Franciele Leila Giopato Viell _{1,

2} , Tiago Bervelieri Madeira ₃ , Suzana Lucy Nixdorf ₃ , Sandra Terezinha Marques Gomes ₄ , Evandro Bona ₂ , Makoto Matsushita ₁

Affiliation

This study investigated the effect of the solvent composition on the extraction of phenolic compounds from teff grains and compared the efficiency between the techniques homogeniser‐assisted extraction (HAE) and ultrasound‐assisted extraction (UAE). The solvents used were water, ethanol and methanol, and the response analysed was the total phenolic content (TPC). The quantitative profile of polyphenols extracted was also determined by ultra‐performance liquid chromatography–tandem mass spectrometry (UPLC‐TQD). According to the optimisation, the maximum response was estimated at solvent ratios of 51:40:9 and 49:26:25 (water/ethanol/methanol, v/v/v) for HAE and UAE, respectively. Under optimal conditions, the extraction technique did not significantly influence the TPC extracted, but the TFC (total flavonoid content) and the antioxidant capacity were significantly higher when UAE was used. The phenolic acids p‐coumaric and protocatechuic and the flavonoids quercetin, rutin and myricetin were the main polyphenols extracted. Both techniques studied were efficient in extracting polyphenols from whole teff grains.

中文翻译：

超均质化与超声从特夫（Eragrostis tef（Zucc。））中提取酚类化合物的比较

这项研究调查了溶剂成分对从teff谷物中提取酚类化合物的影响，并比较了均质化辅助萃取（HAE）和超声辅助萃取（UAE）技术的效率。使用的溶剂是水，乙醇和甲醇，分析的响应是总酚含量（TPC）。还通过超高效液相色谱-串联质谱法（UPLC-TQD）测定了提取的多酚的定量分布。根据优化，对于HAE和阿联酋，分别以51：40：9和49:26:25（水/乙醇/甲醇，v / v / v）的溶剂比率估算了最大响应。在最佳条件下，提取技术不会显着影响所提取的TPC，但使用阿联酋时，TFC（总类黄酮含量）和抗氧化能力明显更高。酚酸对香豆素和原儿茶酚和黄酮类槲皮素，芦丁和杨梅素是提取的主要多酚。研究的两种技术均能有效地从整个teff谷物中提取多酚。

更新日期：2020-01-26

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