Sample Preparation: Automating Concentration & Evaporation
This blog post addresses one of the challenges in sample preparation: labor-intensive concentration and evaporation of samples! A couple of years ago, we added an automated sample evaporator (Rocket Evaporator) to our sample preparation solutions so that samples can be dried completely or concentrated to a small volume automatically. Some of the key features of the Rocket Evaporator include cross-contamination protection, precise temperature regulation, and high levels of solvent recovery, even with volatile organic solvents.
Some of the following questions on the Rocket Evaporator were asked at a very popular webinar, titled, Innovations in Automated Sample Preparation (52 min; link to video recording on our YouTube channel) presented by our Salt Lake Center of Technical Excellence experts. (The accelerated solvent extraction Q&A was featured in an earlier blog post: Accelerated Solvent Extraction: Q&A on ASE Instruments.)
Has the Rocket Evaporator been tested on more volatile analytes than PAHs, such as dichlorobenzenes and phenols?
Yes, we have tested the Rocket Evaporator on more volatile analytes including phenols. Customers have also generated data with dichlorobenzenes. We have found the Rocket Evaporator to deliver quantitative recovery of these compounds.
Have you done any studies on the Rocket Evaporator to determine if there is any cross-contamination between cells?
Yes, we have looked at issue and so far have not found any evidence of cross-contamination between evaporation flasks.
Have any tests been conducted on using the Rocket Evaporator to evaporate alternative flame retardants such as hexabromobenzene, pentabromotoluene, etc.?
We are not aware of any work that has been done with these compounds, but there is no reason to not believe they they will work just fine.
Are there any issues with recovering solvent-insoluble material from the cell after the extraction? Also, are there collection bottles/vials larger than 60 mL?
We have several customers who retrieve the sample in the cell after the extraction routinely with great success. And, yes, we use 250 mL bottles when extracting larger samples (66 and 100 mL extraction cells).
What formats are available for the Rocket Evaporator?
The instrument comes with several formats: evaporation flasks, storage or autosampler vials, puck inserts, and double-ended tubes.
Is the Rocket Evaporator included with the Thermo Scientific Dionex ASE 350 system?
The Rocket Evaporator is a separate stand-alone instrument from the Dionex ASE 350 system.
More about the Rocket Evaporator
Check out this 7-min video on the Rocket Evaporator.
Also, you can read more of the specifications including details on how the instrument works in the Rocket Evaporator Brochure.
If your question has not been answered above, do add it in the Comments box below and our experts will answer it for you. We look forward to hearing from you!