Historically, the 24 position N-EVAP nitrogen evaporator has been Organomation's best-selling sample concentrator. Designed with flexibility as a priority, researchers have emphasized three main reasons why this model is the preferred small volume evaporator for research:
1. Adaptable sample holder
2. Efficient water bath
3. Capacity for 24 sample vials
Adaptable sample holder
While some laboratories may need a preparation solution for a large number of samples held exclusively in one size sample vial, this is not the only challenge. Many laboratories are faced with needing to dry down a small number of samples with differing volumes, and therefore, different vials. The 24 position N-EVAP easily adapts to tubes between 10 and 30 mm outside diameter.
Efficient water bath
Especially in an academic setting, laboratories without a nitrogen evaporator might have students dry down samples by hand, holding a test tube in one hand and a stream of nitrogen air in the other. While manually swirling nitrogen air over the top of a sample will eventually evaporate off the excess solvent, it can be made much faster by adding heat to the solvent removal process.
As a general rule of thumb, the water bath can be set to 10 °C below the boiling point of the solvent which needs to be evaporated.
| Solvent | Boiling Point | Bath Temperature |
| Acetonitrile | 82 °C | 72 °C |
| Methanol | 65 °C | 55 °C |
| Hexane | 69 °C | 59 °C |
| Acetone | 56 °C | 46 °C |
| DCM | 40 °C | 30 °C |
It is worth noting that due to the accessibility of deionized water, inert properties, and wide temperature range, water makes an ideal heating medium for concentrating organic, liquid samples. Organomation's engineering team obsesses over ensuring that the water baths heat uniformly, without hot or cold zones.
Capacity for 24 sample vials
The ability to dry down 24 test tubes at a time has also resonated with lab technicians. Throughout the years, this model has remained the best seller in spite of Organomation adding different sizes to the N-EVAP product line, both larger and smaller.
This capacity allows chemists to prepare twenty samples and four blanks at the same time. Blanks, or QC samples, go through the same process as the rest, but do not contain the specific analyte of focus. There are many reasons for running blanks such as establishing baseline performance and monitoring for possible contamination issues.
For researchers in an academic setting, the N-EVAP is the most versatile concentrator of small volume samples available today.
Use our sample evaporator product finder to see if the N-EVAP sample concentrator is the best instrument for your needs!