Ion Transfer Tube Temperature
Ion Transfer Tube Temperature - Related Videos
08:35
Testing the Heat Transfer Efficiency of a Finned-tube Heat Exchanger
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Heat exchangers transfer heat from one fluid to another fluid. Multiple classes of heat exchangers exist to fill different needs. Some of the most common types are shell and tube exchangers and plate exchangers1. Shell and tube heat exchangers use a system of tubes through which fluid flows1. One set of tubes contains the liquid to be cooled or heated, while the second...
06:43
Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
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Cited by 6 •
2017
This study presents a novel method to provide efficient patient temperature control for cooling or warming patients. A single use, triple lumen device is placed into the esophagus, analogous to a standard orogastric tube, and connects to existing heat exchange units to perform automatic patient temperature management.
11:04
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Cited by 1 •
2016
Here, we describe protocols to prepare phosphonium-based ionic liquid and lithium bis(trifluoromethane)sulfonimide salt electrolytes, and assemble a non-flammable and high temperature functioning lithium-ion coin cell battery.
02:43
Fly Aspirator Tube: A Simple Tool to Transfer Live Drosophila
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2023
This video describes one method to build a fly aspirator, which can be used to transfer insects between enclosures without anesthesia. The aspirator in the example protocol was prepared for an experiment to quantify individual grooming...
03:24
Common Ion Effect
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2020
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide: This solubility equilibrium may be shifted left by the addition of either silver(I) or iodide ions, resulting in...
FAQs
Heating the transfer interface encourages solvent evaporation from droplets or ion-containing material before entry into the mass spectrometer. More complete desolvation can help ions reach the instrument in the gas phase rather than remaining associated with solvent. The temperature therefore influences how effectively the interface converts the incoming sample stream into a form suitable for mass analysis.
Increasing the temperature can support solvent removal, but excessive heat may cause thermally labile compounds to degrade or undergo unwanted chemical changes. Those changes can decrease the abundance of the expected molecular ion and modify the observed mass spectrum. Selecting the setting therefore requires weighing improved transfer against preservation of the analyte’s chemical identity.
The selected temperature can influence signal stability, sensitivity, and measurement reproducibility. A setting that supports efficient desolvation may produce a more consistent ion stream, whereas unsuitable heating can reduce molecular-ion abundance or introduce chemical changes. Monitoring these analytical outcomes while adjusting the parameter helps identify conditions that provide dependable measurements for a particular sample.
Thermally labile compounds are especially sensitive to excessive heating at the ion-transfer interface. Their molecular-ion abundance may decrease, and the mass spectrum may show changes caused by thermal degradation or other unwanted chemical transformations. As a result, a temperature that benefits solvent removal for one sample may compromise identification or measurement of another sample containing heat-sensitive compounds.
Optimization should compare temperature settings while examining the resulting signal stability, sensitivity, reproducibility, and molecular-ion abundance. The preferred condition is not simply the hottest setting; it is the setting that promotes adequate desolvation without producing evidence of thermal degradation or altered chemistry. This balance is particularly important when the liquid-chromatography sample contains thermally labile compounds.
This parameter is especially important in liquid chromatography–mass spectrometry and related analyses where solvent removal, ion transmission, and analyte preservation all affect the measurement. Careful control becomes more critical for samples containing thermally labile compounds. Appropriate optimization can support stable signals, improved sensitivity, and more reproducible results while reducing the risk of changes to the observed mass spectrum.