Solvent Compatibility for Your Nitrogen Evaporator || Organomation



August 2, 2022

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  • Solvent Compatibility Table: Related Article: Contact Us: Solvent Compatibility for Your Nitrogen Evaporator Organomation understands that each customer application is unique. That is why our nitrogen evaporators come in a variety of customized models to accommodate your lab’s specific needs. There are some important factors to think about before purchasing a nitrogen evaporator. If you will be working with… • Corrosive or flammable solvents • Sensitive samples • Or solvents with high or low boiling points …then a customized instrument model may be required. Organomation has four models available, and this video will explain when each is recommended. One option we offer is our Teflon coating, which is a corrosion-resistant coating that helps prevent corrosive solvents from damaging the instrument. This coating option is recommended when using highly acidic, basic, or otherwise corrosive solvents. Some of the most popular ones being Hydrochloric Acid, Ammonium Hydroxide, Chloroform, and pee-ruh-deen (Pyridine). For labs working with highly flammable solvents, our team suggests evaporators with a positive pressure purge device, also called a Z-Purge. The Z-Purge is a safety device that is meant to keep flammable solvent vapor away from the instrument’s heating elements. It maintains a small flow of nitrogen into the bath pan. This creates a slight positive pressure gradient inside the bath case, preventing highly flammable vapors from igniting. The device is recommended for any application using highly flammable solvents such as Carbon Disulfide, Diethyl Ether (dai-eh-thuhl ee-thr), Hexane, and Pentane. In addition to water baths, we offer dry bath models. A dry bath N-EVAP will have aluminum or glass beads as the heating medium, instead of the standard water bath. They are highly recommended when working with water sensitive samples. The dry bath medium also allows for a higher temperature range than water baths, so this option is recommended when working with solvents that have high boiling points above 90 °C. For labs using solvents with low boiling points, or heat sensitive samples, unheated instruments are an option. These instruments initiate the evaporation process by nitrogen blowdown only. They are also a good option for evaporating very small samples that can be effectively dried with only the use of nitrogen blowdown, and not the additional heating element. These instrument options are designed to help keep both you and the instrument safe during the evaporation process. They will allow for efficient sample preparation for most applications. So how do you know which model is the best choice for your application? Organomation has published a solvent compatibility table which provides option code recommendations for the most commonly used solvents. A link to this table will be located in the description box below. If you will be using a solvent that is not listed on the table, or if you have questions on any instrument model, please reach out to or 978-838-7300 to speak to one of our sales technicians.

    Analytical TechniquesChromatographyEnvironmental ScienceMass Spectrometry

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