Solvent extraction is one of the most used analytical techniques to separate compounds by using solvents and exploiting components&#; solubility differences.
There are several methods of performing an extraction. The traditional Soxhlet method is the best known though it has multiple areas for improvement.
Modern analytical laboratories are striving to develop methods that accomplish the desired results in a more rapid, less expensive, and automated manner.
The SER 158 Automatic Solvent Extractor works totally unattended and, as the table below shows, enables you to:
1. Speed up your analyses
In Hot Solvent Extractions the thimble is directly immersed in the boiling solvent. Differently, in Soxhlet ones there is the need for the solvent to pass back to the solid bed of samples many times and this makes the analyses require more than 150 minutes for each one.
2. Save valuable operator time
Thanks to full automation, the operator time is reduced to 2 minutes per analysis, which is the time needed to prepare the sample and set up the instrument.
Once done, the VELP SER 158 will automatically and unattended perform multiple extractions.
Moreover, results are immediately calculated and stored on the onboard memory and thanks to the VELP Ermes Cloud Platform the operator can monitor and control analyses from a virtual cockpit anywhere, anytime.
3. Maximize solvent recovery
The VELP titanium condensers enable more than 90% of solvent recovery. The solvent is collected in the cooled recovery tank and it can be reused, cutting down operating costs.
4. Reduce water consumption
A minimal cooling water consumption (starting from 1 l/min) and the independent heaters switch on/off, enabling more than 60% of water consumption reduction.
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Accelerated solvent extraction, or ASE, is a sample preparation technique that helps generate high quality chromatographic results by using organic solvents at high temperatures and pressures to quickly and efficiently remove unwanted matrix components from your sample. The elevated temperature increases the efficiency of extracting analytes from the matrix. The increased pressure keeps the solvent liquid, even as the temperature surpasses its boiling point. The lower solvent viscosity improves the diffusion of analyte into the solvent, making extraction faster and more efficient. Ultimately, this technique supplies a cleaner sample for separation and detection of sample components during downstream chromatographic analysis, providing more accurate results.
ASE is accepted in US EPA Method A for extracting PAHs and semivolatile compounds, PCBs, dioxins, furans, TPH and explosive compounds as well as in CLP OLM 04.2A for semivolatiles and pesticides.
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This technique can be used to analyze food products for pesticide residues, lipids after acid hydrolysis, fat and additive content, and flavor profiles. It can also be used to help verify that supplements like St. John&#;s wort, echinacea, and ginko biloba meet industry guidelines.
Instruments can be used to automate the ASE process, mitigating variability inherent in manual sample preparation and ensuring reproducible results. Automation makes ASE a fast, safe and easy process. Where traditional techniques like Soxhlet and sonication take 8-10 hours and hundreds of milliliters of solvent, automated ASE requires just 15-30 minutes and 10-30 mL of solvent, depending on the application, and allows samples to be extracted overnight.
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