Evaporators and Evaporation Systems

By Lab Manager Magazine

Top 5 Signs That You Should Service or Replace Your Nitrogen Evaporator

article image article image It uses a water bath vs. a dry heat block. Water baths can cause contamination by condensing evaporate from the water bath on the lid and dripping into your sample.
article image Evaporation rates are getting longer. This could be a sign of cracked or damaged nitrogen hoses or gaskets. It could also indicate a heater problem.
article image A sample temperature probe is not available. Temperature probes read actual sample temperature during evaporation. Without it, samples could overheat, causing degradation and damage to the sample.
article image Too much nitrogen is being used. There could be a leak in the nitrogen line or in the system, wasting valuable nitrogen.
article image The evaporator is no longer reliable. Inconsistent evaporation rates from run to run could indicate service issues that could be costly to fix.
Top 5 Signs That You Should Service or Replace Your Vacuum Concentrator
article image Refrigeration of samples during evaporation is not available. Heat sensitive samples, such as protein and RNA can be ruined if they are overheated. A vacuum evaporator with controlled cooling is required.
article image The concentrator takes up a lot of space. Newer concentrators are as small as a 9” cube and others include the concentrator, cold trap and pump in one box. A floor model option houses the vacuum pump and doesn’t take any bench space.
article image Your application has changed. The vacuum concentrator was intended for aqueous samples, but now solvents or acids are used. Corrosion of key components, including the chamber, lid and rotor hub, could affect the concentrator’s ability to evaporate or even operate.
article image The unit no longer pulls a good vacuum. Gaskets, hoses and all rubber components break down over time, causing a decrease in depth of vacuum resulting in longer evaporation times.
article image The evaporator is no longer reliable. Inconsistent evaporation rates from run to run could indicate service issues that could be costly to fix.

Top 5 Questions You Should Ask When Buying An Evaporator or Evaporation System

article image 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.
article image 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 -50C cold trap is ideal for aqueous-based samples, a -85C cold trap traps most solvents and a -105C cold trap is recommended for alcohols.
article image 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 temp erature control recommended to maintain the viability of heat liable samples.
article image 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.
article image Do you prefer vacuum evaporation or nitrogen blow-down? Some samples require evaporation under nitrogen, which is gentler, for volatile solvents.

Recently Released Evaporators and Evaporation Systems

CentriVap® Complete Vacuum Concentrators

  • Uses a combination of centrifugal force, vacuum and heat to speed evaporation
  • Includes concentrator and a -50?C cold trap to help protect the vacuum pump from corrosive effects of vapors and fumes
  • Also features an aluminum rotor that holds up to 40 microcentrifuge tubes and 108 each 12-13 mm tubes


HT-4X, HT-12 and EZ-2 Acid-Resistant Evaporators

  • For laboratories that wish to use stronger mineral acids and acid chlorides, special models of Genevac systems exist which are specifically designed to be resistant to these highly corrosive acids
  • Acid-Resistant EZ-2 Plus Evaporator uses inert and corrosion proof materials to enable it to withstand up to 6N Hydrochloric acid, 70% Nitric acid and most acid chlorides including thionyl chloride


MiniVap and Ultra Vap HPLC Sample Evaporators

  • Use warm air or nitrogen to speed up the evaporation of common HPLC solvents such as dichloromethane, methanol and acetonitrile from sample vials
  • A new 48-well needle head with a dedicated HPLC vial holder that accepts 48 standard 1.5ml vials transforms any MiniVap or UltraVap system into a high throughput HPLC sample evaporator

Porvair Sciences

AQUACOUNTER EV-2000L Oil Evaporator

  • Utilizes azeotropic distillation and completely separates water from sample matrices, thus eliminating any side reactions with interfering substances
  • Especially useful for determining moisture in difficult samples such as heavy oils, grease, peanut butter, etc.
  • CE approved and can be used with the AQUACOUNTER KF titrators, or any other manufacturer’s titrators


(US: JM Science www.jmscience.com)

Evaporator and Evaporator System Manufacturers

Buchi www.buchi.com

EYELA www.eyelausa.com

Genevac www.genevac.com

Glas-Col www.glascol.com

Heidolph USA www.heidolphUSA.com

HIRANUMA www.hiranuma.com

IKA Works www.ika.net

JEOL USA www.jeolusa.com

LABCONCO www.labconco.com

Organomation Associates www.organomation.com

Pope Scientific www.popeinc.com

Porvair Sciences www.porvair-sciences.com

VACUUBRAND www.vacuubrand.com

Thermo Fisher Scientific www.thermoscientific.com

Yamato Scientific America www.yamato-usa.com


Categories: Lab Products

Published In

2013/2014 Product Resource Guide Magazine Issue Cover
2013/2014 Product Resource Guide

Published: August 9, 2013

Cover Story