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Laboratory concentrators: how can samples be concentrated quickly without degrading them?

From drying extracts to solvent exchange, evaporators and concentrators are the backbone of sample preparation. Fine control of temperature, vacuum or nitrogen flow rate, solvent recovery and anti-bumping protection keep heat-labile analytes safe and speed up your LC/MS, SPE, HPLC and omics workflows. Depending on volume, chemistry (ACN, MeOH, DCM, hexane, DMSO…) and thermal sensitivity, choose a concentrator or a nitrogen blowdown evaporator.

What are the different types of evaporators and concentrators?

Two instrument families cover most needs. The centrifugal vacuum concentrator (SpeedVac-type) combines centrifugation, vacuum and gentle heat: no more bumping or splashing; ideal for DNA/RNA, peptides and microvolumes in tubes or plates. The nitrogen evaporator blows N2 over a temperature-controlled bath: ultra-efficient for highly volatile solvents and parallel series (SPE fractions).

In which applications are evaporators or concentrators used in the laboratory?

• Life sciences: concentration of DNA/RNA, peptide/protein preparation prior to LC/MS, buffer/solvent exchange.
• Chemistry and synthesis: post-reaction solvent evaporation, crystallisation, recycling of solvents, drying of sensitive compounds.
• Pharma/biotech: preparation of analytical batches, HPLC/SPE fractions, impurities.
• Environment: concentrate residues (pesticides, PFAS) prior to GC/LC, solid and liquid extractions.
• Agro/cosmetics: flavours, essential oils, quality control of raw materials and finished products.
• Quality control/R&D: solvent exchange, high-throughput for screening and stability studies.

Available types of evaporators and concentrators

FAQs on laboratory evaporators and concentrators

What level of vacuum and which condenser for chlorinated solvents?
Opt for a chemically resistant diaphragm pump, precise vacuum control and a high-capacity condenser (-10 to -20 °C) or a cold trap to capture DCM/CHCl? with no emissions.

How do you prevent bumping and sample loss?
Ramp the vacuum, use rotation/centrifugation, add anti-bumping granules, limit bath heating and size a cold trap appropriately; monitor the effective boiling point.

Do wetted materials matter?
Yes: choose PTFE, PFA, borosilicate glass and FKM/FFKM seals for aggressive solvents. Avoid DCM-sensitive plastics and check the compatibility of plates/tubes.

How can you reduce nitrogen and energy consumption?
Use auto-shutoff nozzles, insulated lids, baths at an optimised temperature, parallel workflows, high-efficiency oil-free pumps and effective condensers to minimise losses.