Deep eutectic solvents (DESs) have been tested as promising green solvents for the microwave‐assisted extraction of phenolic compounds from brewer's spent grain (BSG). Firstly, a preliminary screening with four different DESs was carried out in order to determine the most effective DES for recovering phenolic compounds (measured as total phenols) from BSG. Later, an experimental design using the DES found to be most effective in the preliminary screening was applied to optimize microwave‐assisted choline chloride (ChCl):glycerol extraction.

中文翻译：

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微波辅助从啤酒糟中提取酚类化合物的低共熔溶剂

深共晶溶剂（DES）已被测试为有前景的绿色溶剂，可用于微波辅助从啤酒糟中提取酚类化合物（BSG）。首先，用四种不同的DES进行了初步筛选，以确定从BSG中回收酚类化合物（以总酚计）的最有效DES。后来，使用在初步筛选中最有效的DES进行的实验设计应用于优化微波辅助氯化胆碱（ChCl）：甘油的提取。