PN7520 Eluent Degasser
PN7520 Solvent Degasser
Eluent degassing with PN7520 Solvent Degasser is a critical and important step in FFF, SEC and HPLC, as oxygen and other dissolved gases affect the analysis for various reasons. Because of different pressure ratios and different temperatures along the flow path, dissolved gases can be released. This will influence the flow rate stability and detector signal noise of the analysis. Especially for analysis methods using Light Scattering, UV and RI detection, vacuum degassing method allows an operation with lowest possible detection limits due to more smooth and stable baseline conditions.
In the vacuum chamber, the eluent is transferred through a special TeflonTM* AF amorphous tube which acts as a semi-permeable membrane. When a high vacuum is applied, the dissolved gases diffuse through the thin wall of the tube. With a total solvent volume of 0.45 mL per degassing channel, the PN7520 has an extremely low dead volume, thus making solvent changes an easy process. The remaining minimum gas concentration will be 0.5 ppm oxygen at a flow rate of 0.5 mL/min. With a given flow rate, the degassing quality can be further increased by coupling two or several channels in series. The PN7520 Degasser is available with 4 channels, but special configurations may be possible as well. For removing possibly existing solvent traces, the vacuum pumps waste gases can be directed via a flexible tube connection to the laboratories ventilation system.
* TeflonTM AF is a trade mark of Dupont