This concept seems simple today, but traditional nitrogen evaporators haven’t been overhauled for many years. Even in our lab we were not able to store evaporation methods… until now!
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One of the hottest, yet most neglected topics in sample preparation is evaporation. Most chromatographic methods require some form of sample cleanup prior to injection into a HPLC or GC system to prevent clogging or undesired interferences. Many users opt to skip evaporation and perform a direct injection of the purified sample, but this is not always feasible.
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Developing a new sample prep method should be systematic to ensure ruggedness, and can be done quickly with the right tools. The days of using a vacuum manifold are gone, along with the variability and long extraction times incurred. Today’s options provide an array of positive pressure systems that process a wide range of sample matrices, varying in viscosities.
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We’ve all been there. We prepare a batch of samples to analyze, prime our systems, warm up the detector, and within 2-3 injections we receive an error message stating that an integral component has failed for one reason or another. This can be a dreadful experience, especially for a routine production laboratory.
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Have you ever encountered problems loading your samples onto an SPE or SLE plate? Aside from sample viscosity or cartridge blockages, a good troubleshooting step to start with is ensuring that you are achieving complete frit coverage on the load.
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