蒸馏法

Benzoic acid and sorbic acid in vinegar were extracted by distillation and determined by high perform liquid chromatography.

摘 要：研究了一种用蒸馏法提取、高效液相色谱法测定食醋中苯甲酸和山梨酸的方法。

To reduced the cost, combined with the content of benzaldehyde in bitter almond oil, extract almond oil with press and extract bitter almond oil with wet distillation is the best echnology line.

若以降低成本为目标，结合精油中苯甲醛的含量，则以热榨法提取脂肪油以后通过水蒸气蒸馏法提取苦杏仁精油为综合利用苦杏仁的最佳工艺路线。

In this study,urea inclusion method and molecular distillation method were applied in the purifications of ethyl ester of EPA and DHA.

用尿素沉淀法和分子蒸馏法研究了二十碳五烯酸、二十二碳六烯酸乙酯的分离提纯。

The results showed that SFE-CO_2 was the ideal method to extract volatile oils from lotus leaves. GC-MS was applied to isolate and analyze the components of extracted volatile oils. 76 components were detected, among which SD and SE detected 23 components respectively, while SFE-CO_2 detected 52 components. The main ingredients were terpenes, alcohols, esters, ketones and alkyls, etc.

并通过GC-MS联用技术，对提取得到的挥发油组分进行了分离分析，共检出76种成分，其中水蒸气蒸馏法和有机溶剂提取法分别检出23种成分，超临界萃取所得荷叶挥发油检出52种成分，主要为萜烯、醇、酯和酮、烷类化合物等。

The invention has the advantages that: 1 the preparation method is simple, the obtained pine needle essential oil has good quality and higher yield, the yield is increased by 30 to 49 percent or so compared with that of directly adopting the steam distillation; 2 the hydrophilic ionic liquid can be reclaimed and recycled by adopting the ion exchange method, which can not cause the environmental pollution.

本发明的优点：1制备方法简单，得到松针精油质量好，得率较高，比直接采用水蒸气蒸馏法的产率高30～49％左右；2亲水的离子液体可以采用离子交换法回收循环使用，不会造成环境污染。

By using the direct distillation principle, an improved and quick method which can determine the protein content in maize, soybean meal, rapeseed meal, fish meal, wheat bran, formula feed for swine and formula feed for chicken was established. The result of the study on 142 products belonging to 7 kinds of feedstuffs in three laboratories suggested that: the DD method has fine correlation with the National Standard Method. The relative deviation of the two methods was in conform to the National Standard. The coefficient of variation between different laboratoies was lower than 3%, the coefficient of variation within single laboratory was lower than 2%.

利用直接蒸馏法原理，经研究改进而建立的快速测定玉米、豆粕、菜籽饼、鱼粉、麸皮、猪配合饲料、鸡配合饲料蛋白质含量的新方法。3个实验室对7种类型142个饲料产品的研究结果表明，本法与国标法有很好的相关性，两法测定值相对偏差均达到国家标准规定的要求。

In this article Karl Fischer method is used to determine the water of expanded ammonium nitrate explosives. It solves the problem of too-long testing time as the method of distillation of WJ9026, and realizes the rapid on-line determination of water of expanded ammonium nitrate explosives.

文章应用卡尔费休法测定膨化硝酸铵炸药的含水量，有效解决了WJ9026中蒸馏法在生产过程中应用时测试周期较长的问题，实现了膨化硝酸铵炸药在线水分的快速测定。

There are three traditional methods to get it, which include steam distillation, expression and solvent extraction.

传统提取柑橘精油的三种方法是水蒸气蒸馏法、压榨法和浸提法。

Results: Volatile oil extracted by squashing extraction was as good as extracted by steam distillation . Volatile

结果 压榨法提取的生姜汁中所含挥发油保留了传统水蒸汽蒸馏法的挥发油成

The methods to eliminate the furfural's interference in the determination of cyanide in wastewater, such as silver salt, petroleum ether extraction, two-step petroleum ether extraction, are tested and compared.

目前对糠醛干扰氰化物测定方面的报道不多，大多是只是针对醛类干扰的消除方法，主要有：NaCl -AgNO3-H2 SO4蒸馏法〔3〕、银盐沉淀法〔4 ，5〕、萃取分离〔6〕。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失