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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.

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This test is to publish an Application Note with an Application Letter embedded. 

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カンナビス科学に関するこの小冊子には、カンナビノイド（THC、CBD）とテルペノイドの収穫と抽出、活性体の濃縮、溶媒のリサイクル、カンナビノイドの精製、農薬の除去について説明しています。

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ケルダール習熟ガイド

このガイドでは、ビュッヒの50年以上にわたるケルダール分析およびアプリケーションの開発経験が要約されています。ケルダール法に沿った蛋白質の定量に関するビュッヒの知見をお届けします。

ケルダール知識ガイド

このガイドでは、ビュッヒの50年以上にわたるケルダール分析およびアプリケーションの開発経験が要約されています。ケルダール法に沿った蛋白質の定量に関するビュッヒの知見をお届けします。

ケルダール実践ガイド

このガイドでは、理論と日常業務に役立つ情報を提供し、オペレーターの毎日の作業をサポートします。

Multivapor™ アプリケーションガイド

多検体サンプルの蒸留をパラレルで行い、迅速化が可能です。Multivapor™ は使いやすく、最大限の効率化が得られるようにカスタマイズされます。 

このハンドブックは、特定の溶媒と混合物を高いパフォーマンスで蒸留するためのガイドラインです。