Generally, referring to the evacuation of free gasses from the application liquid.
Removal of gases from the mobile phase prior to column injection is important in HPLC to prevnt bubble formation as pressure decreases toward the bottom of the column (causing baseline spikes and noise). Degassing is achieved by heating a solvent, by helium sparging, by using vacuum (in a vacuum flask), or by on-line evacuation from a tube made of a gas-permeable substance.
The opening and closing of a mould to allow gases to escape early in the molding cycle. Also called Breathing. When referring to plastic sheeting, "breathing" indicates permeability to air.
Removing gas from a solid or liquid material under vacuum.
The process of releasing gas (CO2)by fresh roasted beans. As long as CO2 release continues, the coffee bean is protected from oxygen action, or stalling.
The escape of trapped gases, mostly carbon dioxide, from freshly roasted coffee.
A natural process in which recently roasted coffee releases carbon dioxide gas, temporarily protecting the coffee from the staling impact of oxygen.
The process of removing dissolved gas from the mobile phase before or during use. Dissolved gas may come out of solution in the detector cell and cause baseline spikes and noise. Dissolved air can affect electrochemical detectors by reaction or fluorescence detectors by quenching. Degassing is carried out by: heating the solvent, by vacuum ( in a vacuum flask), on-line using evacuation of a tube made from a gas permeable substance such as PTFE, or by helium sparging.
The deliberate removal of gas from a material, usually done by heating the material under vacuum.
Release of charge gases from the cell openings provided (plug, valve, gas duct).
The process of removing dissolved gases from the MOBILE PHASE, to provide stable detection results. Often achieved through HELIUM SPARGING, vacuum filtration, inline vacuum degassing, and heating.
Usually a chemical reaction resulting from a compound added to molten metal to remove gases from the metal. Often inert gases are used in this operation.