Choosing The Right Evaporator For You; Help Your Colleagues; Questions From The Vault | Labwrench eNews | LabWrench

November 24, 2014

Product Resources

Top 5 Questions You Should Ask When Buying an Evaporator System

  1. What are your sample sizes? Microtiter plates and micro centrifuge tubes work best in a centrifugal vacuum concentrator. For large samples up to 450mls, a vortex evaporator is recommended.
  2. What are your samples? Acids require an acid resistant system. Solvents damage plastic and rubber components; an appropriate system to prevent damage is recommended. A -50°C cold trap is ideal for aqueous based samples, a -85°C cold trap traps most solvents and a -105°C cold trap is recommended for alcohols.
  3. Are your samples heat sensitive? Even at ambient set point, vacuum concentrators add heat through friction. A concentrator that has refrigeration built into it will give you the temperature control recommended to maintain the viability of heat liable samples.
  4. Do you have limited space? A floor model with casters or small all-in-one benchtop model can be moved out of the way when not in use.
  5. Do you prefer vacuum evaporation or nitrogen blow down? Some samples require evaporation under nitrogen (which is more gentle) for volatile solvents.

Click here to read more about choosing the right Evaporator for your needs.

Product of Interest


 VirTis AdVantage Pro Freeze Dryer / Lyophilizer

The AdVantage Pro lyophilizer with Intellitronics™ Controller offers the convenience of a tray dryer in a benchtop unit. Monitor your cycle from anywhere you receive email! Users can receive alarm alerts through Ethernet communication and email options.

Read more about the AdVantage Pro on the SP Scientific website


 BrandTech Scientific Transferpette S Single Channel

The Transferpette S pipettes were benchmarked against all of the leading instruments, incorporating the best features of each, to achieve an exceptional standard of comfort in a traditional design. The Transferpette S offers robust yet lightweight construction, superior autoclavability, simple one-handed operation, high degree of accuracy and precision, and Easy Calibration™ technology for long lasting reliability. Available as fixed-volume and digital models in volume ranges from 0.1uL to 10mL.

Visit the BrandTech Scientific website to learn more about the Transferpette S Single Channel Pipette


Help your Colleagues

Plenty of discussions are happening on LabWrench all the time. We have many questions come in daily from users that are seeking advice from fellow users and lab professionals on LabWrench. Can you help any of these users find the answers they are looking for?

BUCHI Corporation Rotavapor R-22
The ball bearing of the drive unit of my BUCHI R-220 is worn out and makes a lot of noise. I want to know how to remove it myself. If someone is able to tell me how, I'd be very grateful. Advise this member.

Need operating software for Digiflex TP Pipetter
This unit model# 33020, it is a Digiflex TP Pipetter, s/n# 70680 P. It would be great to put this instrument back into service as a back up unit. Will need the software and a little instruction on how to service and prepare unit for service in the lab. We once had the software, but who knows where it is now. Advise this member.

VirTis Genesis 25SL
When I turn on the condenser the shelf compressor comes on also even though the freeze switch is off, is this normal operation? Advise this member.

Click here to view all Questions and Discussions on LabWrench.

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Company News Hot Off The Press

Lightweight Electronic Pipette Offers Enhanced Ease of Use
The VIAFLO II’s integral colour screen together with easy to navigate touch wheel user interface ensures set up and operation are both simple and fast. With the VIAFLO II touch wheel user interface, it’s a lot quicker and easier to change volumes than with a manual pipette. Forget about twisting/rotating a knob on the manual pipette to go from high to low volume (or vice versa).  Read more.


High Throughput Biological Sample Concentrator 
The miVac Quattro centrifugal vacuum concentrator rapidly removes a wide range of solvents, from volatile organic solvents through to DMF, including water, making it the ideal system for concentrating precious samples in applications including oligonucleotide synthesis, RNA/DNA preparation, peptide preparation, sequencing, molecular biology and ADME / toxicology research.  Read more.


RC 900 Rotary Evaporator Wins Prestigious Red Dot Award
KNF Neuberger, Inc. is honored to announce its new RC 900 rotary evaporator has been selected for the prestigious Red Dot Award in the category of Product Design. Launched earlier this year, the most recent addition to the KNF product family was able to withstand fierce competition from a huge number of entrants; 4,815 applications from 53 countries were submitted for this year’s award. Read more.

 Click here to view all news articles on LabWrench.

Sponsor of the Week

Thank you to Buchi Corporation for sponsoring our Evaporators/Concentrators category on LabWrench
For over 50 years, Buchi has been known as the market leader and the inventor and innovator of lab instruments based on Evaporation and Vacuum technologies and as the supplier of the Rotavapor® technology. Buchi's New North American distribution center in New Castle, Delaware was opened on November 17th, 2006. The distribution center was designed to provide shipping and support services to all Buchi customers in the USA and Canada. The personnel at the distribution center will be happy to provide customers with Technical support, Applications support, Service support and sales information. We have enhanced our distribution partnerships with distributors such as ThermoFisher and VWR to ensure Buchi customers have the best Buchi experience. Buchi Corporation is your reliable solution partner. Whether your needs involve Nutritional analysis, Sample preparation, NIRSolutions, or Preparative flash chromatography, our experienced technical staff can provide the support needed to define Applications and method development. Buchi can provide Installation Qualification (IQ) and Operational Qualification (OQ) to ensure compliance and satisfaction. All Buchi systems are covered by a comprehensive service and support package including operation, theory, optimization and applications. Buchi can customize seminars and Training to meet the requirements of any customer and ensure the success of their analytical and automation program.

Visit the Buchi Corporation website to see their full product line

Upcoming Free Webinar


FREE Webinar:
Food and Nutrition Science

Thursday December 4, 2014
12:00 - 1:30 PM EST

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Questions from the Vault

We have so many questions filling our forums that sometimes questions can be missed and go without answers. Can you help us provide answers for these users with unanswered questions?

Retsch Mortar Grinder RM 200
My RM 200 shows error f4 which means the hood is open. I have tried to clear the error by pressing stop but it keeps coming back. Please advise! Advise this member.

Air flow rate
Will the Aura 550 capture isoflurane gas in the carbon filter? Is the fpm too fast for capture in the filter? Is there any way to tell if the filter is saturated? Advise this member.

Bio-Rad MiniOpticon - Drops remaining at the lid?
My lab has used this for several years and we didn't see any troubles until this year. When a PCR program is done, there are times we see lots of droplets scattered at the inner side of the lid. When this happens, PCR products don't seem to be successfully produced and no outcome is seen in electrophoresis. Is this happening in other labs too? Advise this member.

Click here to view all Questions and Discussions on LabWrench.






Links to CATEGORY PAGES on LabWrench

Atomic Absorption
Clinical Chemistry Analyzers
Evaporators Concentrators
Fume Hoods
GC Systems
Hematology Analyzers
HPLC Systems
Microplate Readers
PCR Thermal Cyclers
UV / VIS Spectrophotometers


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