应用

Efficiency comparison of extraction process between lab and industrial Rotavapor

Application Note Sepiatec SFC purifying the triterpene amyrin

Application Note Sepiatec SFC purifying stevioside

Application Note Sepiatec SFC purifying lavender essential oil

Application Note Sepiatec SFC purifying cannabinoids

Application Note Sepiatec SFC separating Crocus savitus

SpeedExtractor E-916, Multivapor™: Determination of Polymer Plasticizers in Polyamide samples using the SpeedExtractor E-916

快速色谱法分离大麻素

通过快速色谱法分离大麻素

SpeedExtractor E-916, Multivapor™: Fat determination in Mayonnaise and Chocolate using the SpeedExtractor E-916

色谱百科：完整指南

完整色谱百科为您提供开发和执行最佳快速色谱和 HPLC 制备方法的基本知识。依靠简洁的理论和对色谱过程所有部分的清晰解释。使用色谱基础知识，通过耗材、检测方法、最适合您的应用的固定相和流动相来开发自己的方法。

This application guide describes important aspects of the evaporation of solvents and the concentration of a sample to a predefined volume using the SyncorePlus. Guidelines for the evaporation of your specific solvent and solvent mixtures are presented. They will help you to streamline your own process with sample applications, checklists, hints, rules, tables, and tests.

工业蒸发效率指南

免费获取我们的“工业蒸发效率指南”。

运用 BUCHI 的专业知识来根据自身需求自定义和充分利用 Rotavapor® (旋转蒸发仪)。

色谱要点

随时随地可获得最有用的快速色谱和 HPLC 制备基础知识！ 

下载其中包含进行完美分离所需要素的超大型备忘单。

FlashPure: 全覆盖的快速色谱柱

在步琦, 我们努力以高品质的产品、当地技术支持和全球咨询来满足客户的期望。 为了进一步满足客户需求，步琦推出了全新的 FlashPure 色谱柱，具有高性能和多功能性，在全球分销网络中提供。

获取FlashPure选型指南。探索得到最大纯化量的改进特点。

环境平行蒸发指南

该指南介绍了按照符合美国 EPA 方法的要求使用多样品平行浓缩仪 Syncore® Analyst 同时将多个样品同时浓缩到预定义残留溶剂容量的各个方面。

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of immersion angle.

The evaporation rate of a rotary evaporator depends to a large extend on the immersion angle of the evaporating flask. The flatter the immersion angle, the higher the evaporation rate. This is, among other reasons, due to the fact that a flat immersion angle increases turbulence inside the evaporating flask, hence accelerating the evaporation. However, with a flatter immersion angle the evaporating flask cannot be as deeply immersed in the heating bath medium compared with a steep immersion angle. This can be an issue especially working with smaller evaporating flasks. Generally speaking, a 40 degrees immersion angle leads to a maximum efficiency rate without restriction in handling or risking losing parts of the sample due to over spilling and bumping into the receiving flask.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of flask size.

Generally, the larger the evaporating flask the greater is the evaporation rate. This is due to the greater turbulence inside a larger flask, enlarging the active surface and leading to a higher evaporation output. On the other hand, smaller flasks are advantageous when the residue needs to be collected for further quantitative analyses. Moreover, larger flasks generally allow easier handling.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of thickness of flask.

The evaporation rate is noticeably greater if the evaporating flask’s glass walls are thinner. The simple reason is that thinner glass allows better heat transmission from the heating bath through the glass of the evaporating flask to the solvent. Generally speaking, the glass wall thickness should be selected to be as thin as possible, while still being robust enough to prevent breakages of the evaporating flask even at very low pressures. Concerning both these issues, the optimum thickness for a 1 L evaporating flask is between 1.5 and 2.0 mm.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of rotation speed.

The evaporation rate of a rotary evaporator is greater than that of static distillation apparatus. Moreover, the evaporation rate increases with higher rotation speed. This is, among other factors, due to the greater surface area inside the evaporating flask at one given time. Especially significant is the dissipation at lower rotation speeds. For instance an increase in speed above 200 rpm has a relatively low influence on the evaporation output. A rotation speed above 300 rpm can result in mechanical problems, vibrations and spillage from the heating bath. Thus, considering the advantages and disadvantages of different rotation speeds, the optimum rotation speed is around 250 to 280 rpm.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of temperature differences.

There is a direct relationship between the heating bath temperature and the evaporation rate. The more energy applied to the evaporation side, and at the same time removed from the condensation side, the more efficient is the distillation. Furthermore, sufficient cooling as well as an appropriate and stable under pressure are crucial for efficient distillation. On the other hand, the consumption of electrical energy is comparatively greater at higher temperatures. Moreover, some samples are thermo-sensitive, thus exacerbating the circumstances. Therefore the respective parameters have to be fine-tuned to the individual sample and application. The “Delta 20 Rule” is a guideline to compromise between high evaporation output and energy usage. For instance, using the 10/30/50 parameters is appropriate for the evaporation process in order to bring in and to carry off the accumulated energy efficiently.