Extraction of the green pigment The result showed that 80%(V/V) methyl alcohol was the best solvent for the extraction of green pigment.
大蒜绿色素的提取试验首先通过浸提试验筛选最适宜的溶剂及其浓度，确定用80%的甲醇水溶液做浸提溶剂；
The atmospheric concentration of methyl chloride (CH 3Cl) is very low, only at 10 -12 (V/V) level.
氯甲烷在大气中的浓度较低，仅为10 -12 级别。
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