Cryogenic Trap
Cryogenic Trap - Related Videos
09:50
Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures
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Cited by 4 •
2017
A protocol for determining the vitreous phase densities of micro- to pico-liter size drops of aqueous mixtures at cryogenic temperatures is described.
01:41
Social Traps
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2020
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...
02:03
Preparation of Legionella pneumophila for Cryogenic Electron Tomography
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2025
Source: Chetrit, D., et al. Applying Live Cell Imaging and Cryo-Electron Tomography to Resolve Spatiotemporal Features of the Legionella pneumophila Dot/Icm Secretion System. J. Vis. Exp. (2020)The video describes how to prepare Legionella pneumophila samples for cryo-electron tomography by combining bacterial culture, gold nanoparticle marking, and vitrification techniques. The process preserves native cellular structures and enables high-resolution imaging of membrane-associated secretion...
11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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Cited by 19 •
2017
This paper presents a microfabrication methodology for surface ion traps, as well as a detailed experimental procedure for trapping ytterbium ions in a room-temperature environment.
13:39
Optical Trapping of Nanoparticles
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Cited by 7 •
2013
The following setup approach details low power optical trapping of dielectric nanoparticles using a double-nanohole in metal film.
FAQs
Temperature and vapor pressure determine whether a vapor is retained. Lowering the trap temperature favors condensation or freezing when a compound’s vapor pressure becomes sufficiently low under the operating conditions, while more volatile species are less likely to be captured. Temperature selection therefore affects both collection efficiency and the composition of the gas leaving the trap.
Separation reflects differences in volatility rather than complete removal of every gas. Species with relatively high boiling points are more likely to condense or freeze on the chilled surface, whereas less condensable gases remain in the stream. This selectivity reduces solvent or reaction-product vapor loading without necessarily stopping the overall gas flow.
Chemical compatibility matters because collected material contacts the trap and the coolant. A substance that is incompatible with either can make the trapping arrangement unsuitable, even if its vapor would otherwise condense effectively. Evaluating compatibility alongside temperature and vapor pressure helps determine whether a selected trap and cooling condition are appropriate for a particular solvent or reaction product.
A trap placed in the gas or vacuum path can intercept condensable material before that material reaches the vacuum pump. This reduces contamination of pump components and limits the amount of volatile solvent or reaction-product vapor carried through the system. The arrangement connects low-temperature capture with equipment protection, especially in chemistry workflows that generate condensable vapors.
The captured material can support either disposal or recovery, depending on the intended chemistry workflow and the nature of what was collected. Volatile solvents and reaction products are concentrated at the chilled surface rather than continuing through the system. Identifying the collected material and checking compatibility with the trap and coolant helps guide the appropriate downstream handling route.
In chemistry, these devices also provide a controlled point for capturing volatile solvents or reaction products. That collection can reduce contamination while preserving material for recovery or directing it toward disposal. Their value therefore extends beyond vacuum-pump protection: they help manage condensable substances generated during chemical operations and reduce the amount of such material moving through the gas or vacuum stream.