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ANALYTICAL SCIENCES > Instruments > Solvants Degasser

Solvent degassers

All liquids contain dissolved gases which are readily absorbed from the air. In solvents for liquid chromatography, dissolved gases reduce pump flow rate stability, detector baseline stability.

The degassing unit is placed in-line between the solvent reservoir and the inlet of the pump. The action of the pump draws the liquid from the reservoir through the degasing unit. Solvent is drawn through fluoresin membranous tubing which is permeable to the dissolved gases. Hence, gases will permeate out by vaccum through the tubing.

Models available from micro HPLC to preparative applications.

 

Degasser with amorphous fluoropolymer (AF) membrane
  • Efficient and reliable
  • Independent vacuum chambers
  • Amorphous fluoropolymer has gas diffusion rates of 200-300 times that of PTFE tubing
  • Low internal volume
  • Excellent mechanical and physical properties at temperature up to 300°C

 

Max
flow
rate
Residual
dissolved
oxygen
Pressure
loss
Internal
volume
Number of channels
1 2 3 4 5 6 7 8
1ml/min 0.7ppm at
0.5ml/min
0.01psi at
0.1ml/min
0.2ml  AA7111 
 AA7112
 AA7113
 AA7114
 AA7115
 AA7116
 AA7117
 AA7118
3ml/min 0.7ppm at
0.5ml/min
0.081psi at
0.5ml/min
0.35ml  AA7121  AA7122  AA7123  AA7124  AA7125  AA7126  AA7127  AA7128
10ml/min 0.6ppm at
1ml/min
0.31psi at
1ml/min
0.65ml  AA7131  AA7132  AA7133  AA7134  AA7135  AA7136  AA7137  AA7138


Degasser with PTFE membrane
  • Standard and cheaper
  • Independent vacuum chambers
  • Low internal volume

 

Max
flow
rate
Residual
dissolved
oxygen
Pressure
loss
Internal
volume
Number of channels
1 2 3 4 5 6 7 8
1ml/min 0.7ppm at
0.1ml/min
0.22psi at
0.1ml/min
0ml  AA7031  AA7032  AA7033  AA7034  AA7035  AA7036  AA7037  AA7038
3ml/min 0.7ppm at
0.5ml/min
0..36psi at
0.5ml/min
2.5ml  AA7051  AA7052  AA7053  AA7054  AA7055  AA7056  AA7057  AA7058
10ml/min 0.6ppm at
1ml/min
0.24psi at
1ml/min
7.2ml  AA7061  AA7062  AA7063  AA7064  AA7065  AA7066  AA7067  AA7068

 

Ultrastable degasser AF membrane
  • Ultra-high degassing efficiency
  • Independent vacuum chambers
  • Pump work continuously sustaining a consistent vacuum level
  • Low internal volume

 

Analytical model
Max flow rate Degassing efficency Pressure drop Internal volume Number of channels
2 4
2ml/min >70% O2 remove at 1ml/min 0.18bar/ml/min 0.480ml  BZ2942  AJ8504

 

Preparative model
Max flow rate Degassing efficence Pressure drop Internal volume Number of channels
2
20ml/min >70% O2 remove at 10ml/min 0.04bar/ml/min 8.4ml EO5310
20ml/min >70% O2 remove at 10ml/min 0.06bar/ml/min 13.8ml EO5320
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