alcohol precipitation的意思|示意

Solution polymerized styrene-butadiene rubber ( S-SBR ) was fractionated by repeated precipitation method, using redistilled toluene as solvent and ethyl alcohol as precipitant.

本工作用甲苯作溶剂，乙醇作沉淀剂，用沉淀分级法，对溶聚丁苯橡胶（S-SBR）进行了分级。

The precipitate in low-alcohol Maotai Liquor mainly include reversible white floc, black fine solids precipitation, and gray floc.

低度茅台酒生产中产生的主要沉淀为：可逆性的白色絮状沉淀、黑色细颗粒沉淀和灰白色絮状沉淀。

METHODS? Flocculating method and alcohol precipitation method were used.

采用醇沉法与絮凝法。

The pumpkin pectin was obtained by alcohol precipitation after ultrafiltration.

本试验采用超滤浓缩后乙醇沉淀制备南瓜果胶。

Methods:Oral liquid was made by steam distillation, alcohol abstraction method, water abstraction and alcohol precipitation.

方法：分别采用水蒸气蒸馏法、醇提法、水提醇沉法制成口服液；

After ethanol precipitation, OPC was separated by ethyl acetate-ligroin system. Content of OPC was determined by normal butyl alcohol-hydrochloric acid method at 546 nm to be over 90%.

提取物经醇沉后，用石油醚沉淀法分离低聚原花青素，产物经正丁醇-盐酸法显色，比色法测定质量含量可达90%以上。