Organomation
Introduction to Evaporators
Introduction to Solvent Evaporators:

The Series S-EVAP™ are compact bench-top size instruments for concentrating large volumes of solvent in round flasks or Kuderna-Danish flasks. They find use in environmental and other analysis where it is necessary to concentrate extracted materials from liquid or solid samples. This is accomplished by boiling the solvent in a heated water bath. Waste solvent is collected for further purification and reuse or for disposal. The process is fast and solvent loss is minimal.

Features:

  • 8 models will handle 5 to 10 samples at one time.
  • Flask sizes from 125 ml to 1000 ml.
  • Thermostatically controlled water bath provides heat.
  • Shallow bath for round flasks or deep bath for the Kuderna-Danish flasks.
  • Solvent-recovery hardware is standard on all units.
  • Complete systems are bench-top size and can be operated in an exhaust hood or a properly ventilated laboratory.
Evaporation Rates:
Solvent Name Boiling Point Bath Temp. Rate ml/min Time min/200ml
Methylene Chloride 40 ° C 90 °C 20ml 11min
Hexane 69 ° C 95 ° C 12ml 17min
Freon 48 ° C 88 ° C 18ml 11min
Pentane 36 ° C 85 ° C 22ml 9min
Acetone 56 ° C 92 ° C 17ml 12min

The bath temperature is set 30° to 50°C above the solvent boiling point. This overcomes the insulating effect of the glassware and heat losses above the bath and at the condenser.Condensers are cooled to 10°C with individual collection flasks installed. The ratio of recovered solvent to starting solvent averages 97%.
Introduction to Nitrogen Evaporators:

The Series N-EVAP™ and MULTIVAP™ analytical evaporators are time saving and convenient instruments for preparing samples for liquid chromatography, gas chromatography and mass spectometry. They find use in applications where it is necessary to concentrate multiple samples in order to analyze the residue. This is accomplished by the proven technique of blowing Nitrogen onto the surface of a heated sample. The result is a fast and controlled operation.

Features:

  • 10 models will handle 6 to 100 samples at one time.
  • Holds test tubes, vials, Erlenmeyer's, centrifuge tubes.
  • Uses Nitrogen or air as the evaporative agent.
  • Thermostatically controlled water bath provides heat.
  • Low Nitrogen consumption of 330ml/min/sample.
  • 19-gauge needles standard, other sizes optional.
  • All units will fit and are recommended to be used in a bench-top, ventilated hood.
Evaporation Rates:
Solvent Name
 Boiling Point Bath Temp. Rate ml/min Time min/10ml
Methylene Chloride 40 ° C 37 ° C .40ml 25min
Hexane 69 ° C 67 ° C .36ml 28min
Freon 48 ° C 45 ° C .48ml 21min
Pentane 36 ° C 32 ° C .42ml 24min
Methanol 65 ° C 63 ° C .25ml 40min
Acetone 56 ° C 37 ° C .35ml 28min
The bath temperature is set approximately 2° to 4°C below the solvent boiling point. The Nitrogen flow is 330ml/position/minute. Needles are 4-inch long by 19 gauge. Higher evaporation rates can be achieved by increasing the Nitrogen flow rate and using larger diameter 16 or 14-gauge needles.

How to Choose Organomation Evaporators
Volume Concentration
The S-EVAP solvent evaporators concentrate 50 to 1000 ml of solvent after an extraction process has been performed. It is ideal for Methylene Chloride, Hexane and other organic solvents used in environmental or industrial analysis. For oil and grease analysis requiring evaporation to dryness, round flasks and a shallow bath are used. For organic residue analysis and 1 to 3 ml endpoint. Kuderna-Danish flasks, insulated concentrator tubes and a deep bath are used. Solvent collection is standard on all models. Choose a 5, 8 or 10 position unit depending on your sample quantities.		 Multiple Samples

The MULTIVAP Nitrogen evaporators concentrate 1 to 50 ml of solvent in test tubes or small flasks. Each group of 30, 48, 64, 96 or 100 samples is batch processed in a removable rack. Starting and ending volumes are the same for all samples. MULTIVAPs find use in pharmaceutical science, medical testing and general research.
Individual Samples

The N-EVAP Nitrogen evaporators concentrate 1 to 50 ml of solvent in test tubes or small flasks. Each sample is installed individually into a spring-loaded sample holder. Five models feature 6, 12, 24, 34 and 45 positions. They are used in a wide variety of applications including environmental, medical, general research and education. Water baths or dry baths provide heat.		 Corrosive Environments

N-EVAP and MULTIVAP instruments can be ordered with acid resistant coatings and parts to protect against damage from acid vapors.
Intrinsically Safe Baths
When an electrical bath is used for concentrating volatile solvents, there is a risk that the vapors will enter the bath case and be ignited. Organomation baths can be modified with a type Z-purge option (as specified by National Fire Protection Association) that makes the bath intrinsically safe. The case is sealed against leakage and a tube fitting, filter and pressure gauge are attached. Positive pressure of 1 inch water is applied to the case to purge it and then maintained at 1 inch water to insure that vapors remain outside the case. The option is inexpensive and is recommended whenever highly flammable solvents are present.

 

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