cold trap


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cold trap

[′kōld ‚trap]
(mechanical engineering)
A tube whose walls are cooled with liquid nitrogen or some other liquid to condense vapors passing through it; used with diffusion pumps and to keep vapors from entering a McLeod gage.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Researchers from the University of New Mexico will study a special sample retrieved from what is known as a cold trap. The region from which the sample was collected from was cold enough for water to remain in a frozen state.
The constant presence of ice was apparently possible due to a phenomenon called "cold trap."
* Models SDP1030 and SDP2030 Medium-capacity, integrated systems, combining a concentrator, a refrigerated cold trap, a diaphragm pump and a vacuum gauge in a single, compact unit.
A built-in cold trap provides high levels of solvent recovery, even with volatile organic solvents.
One of nitrogen's roles on Earth is to help form a low-temperature layer in the atmosphere that water can't get past, called a cold trap. On a planet without nitrogen gas, Wordsworth says, water would drift to a height where the planet's atmosphere would no longer shield it from UV radiation from the planet's sun.
• Plans for polar cold trap craters, skylights, and peaks investigations
First, the gaseous samples loaded on the sorbent tube were thermally desorbed and passed through the cold trap unit of the TD at a preconcentration of 5[degrees]C.
This allows operation without any cold trap, and thus reduces the total cost of ownership.
Included in the unit is the Concentrator and a -50degC Cold Trap to help protect the vacuum pump from corrosive effects of vapors and fumes as they evaporate from the samples.
The basic components of the microwave extraction system include a microwave source, waveguides to deliver the energy to the soft, and a cold trap to capture the water vapor.
Products were continuously passed through two traps, one maintained at 100[degrees]C (hot trap) and the other at 0[degrees]C (cold trap).