Insufficiently degassed mobile phase in HPLC will lead to higher baseline noise, spikes due to air bubbles, and significant drifting and oscillation of the detector signal in HPLC. These phenomena may lead to significant difficulties in integration of peaks and create problems for quantitative analyses. Dissolved gases affect the operation of the pump and may cause strong pulsation and flow rate changes. This results in serious retention time shifts, making analyte identification difficult.

The SunChrom Vacuum Degasser eliminates these problems by efficient degassing of the eluent. The degasser is placed between the eluent reservoir and the solvent delivery pump. The eluent is drawn through a PTFE tube (Teflon®) that is located in a vacuum chamber. The semi-permeable PTFE tube allows small gaseous molecules to diffuse through the tubing, but the eluent molecules are unable to do so. After the eluent has moved through the PTFE tube, the gas concentration will be reduced down to < 1 ppm. The new generation of degasser has got only one semi-permeable Teflon®AF tube. This material is hundredfold more permeable to gaseous substances than “simple” Teflon® and is more hydrophilic. Due to the very small surface area, biological contamination is minimal and cleaning the tubing is simplified. To rinse the degasser completely or to change an eluent you now need only 1-2 mL instead of 25-40 mL. The internal vacuum pump is also maintenance-free for 5 years! 
The SunChrom Vacuum Degasser is available with two or four channels, so that up to four eluents can be degassed at the same time with a single system. Cross contamination between eluents is eliminated due to individual vacuum chambers for each eluate. 


Technical Specifications and Order Information

Technical specifications  
Internal Volume approx. 480 µL per channel
Pressure Drop 0.18 kPa at a flow of 1 mL/min (pure methanol)
Number of Eluents 2 or 4
Power Consumption Extern 100-240 V AC, 1 A, 50-60 Hz 15-24 V DC max 0.85 A
Size (W x H x D) 73 x 127 x 250 mm (2.87 x 5 x 9.81 in)
Weight 2,4 kg (5.3 lbs)
Operating Temperature 5 – 35 °C
Part Number Short Description
0001-6352 2-Channel Degasser
0001-6354 4-Channel Degasser
190.331 Solvent filter
P-300X Flangeless ferrules, for 1/8″ OD tubing – yellow (10)
P-330X Flangeless nuts, for 1/8″ OD tubing (10)