Nonpolar Liquid Detection
Nonpolar Liquid Detection - Related Videos
09:32
Solid-Liquid Extraction
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2023
Source: Laboratory of Dr. Jay Deiner — City University of New York Extraction is a crucial step in most chemical analyses. It entails removing the analyte from its sample matrix and passing it into the phase required for spectroscopic or chromatographic identification and quantification. When the sample is a solid and the required phase for analysis is a liquid, the process is called solid-liquid extraction. A simple and broadly applicable form of solid-liquid extraction entails combining the...
05:26
A Standardized Liquid Biopsy Preanalytical Protocol for Downstream Circulating-Free DNA Applications
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Cited by 3 •
2022
The liquid biopsy has revolutionized our approach to oncology translational studies, with sample collection, quality, and storage being crucial steps for its successful clinical application. Here we describe a standardized and validated protocol for downstream circulating-free DNA applications that can be applied in most translational research laboratories.
09:21
Efficiency of Liquid-liquid Extraction
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Liquid-liquid extraction (LLE) is a separation technique used instead of distillation when either: (a) the relative volatilities of the compounds to be separated are very similar; (b) one or more of the mixture components are temperature sensitive even near ambient conditions; (c) the distillation would require a very low pressure or a very high distillate/feed...
11:15
Next Generation Sequencing for the Detection of Actionable Mutations in Solid and Liquid Tumors
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Cited by 8 •
2016
This manuscript describes clinical protocols for two next-generation sequencing panels. One panel interrogates hematologic malignancies while the other panel targets genes commonly mutated in solid tumors. Molecular classification of driver mutations in human malignancies offers valuable prognostic and predictive information.
12:58
High-Performance Liquid Chromatography (HPLC)
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2023
Source: Dr. Paul Bower - Purdue University High-performance liquid chromatography (HPLC) is an important analytical method commonly used to separate and quantify components of liquid samples. In this technique, a solution (first phase) is pumped through a column that contains a packing of small porous particles with a second phase bound to the surface. The different solubilities of the sample components in the two phases cause the components to move through the column with different average...
FAQs
Capacitance-based detection responds to how the liquid changes the electrical environment around a sensing element. For nonpolar liquids, the combination of low dielectric constant and low conductivity affects capacitance or impedance differently than more electrically responsive fluids. Engineers can therefore track liquid contact or level through an electrical signal, provided the sensor configuration distinguishes the intended fluid from its surroundings.
Fluid composition is a central source of measurement variation. Hydrocarbons, oils, and organic solvents can differ in their electrical behavior, while temperature may alter the response observed by the sensor. Container material, contamination, and the required sensitivity also influence performance. These factors should be evaluated together when choosing a detection principle and interpreting changes in the measured signal.
No single sensing principle is universally preferable. Capacitance and impedance methods use electrical changes, whereas optical transmission, surface wetting, and acoustic response rely on different interactions between the liquid and sensing element. The best comparison depends on whether the priority is contact detection, monitoring within a container or pipeline, or sensitivity under the expected fluid and equipment conditions.
A practical engineering workflow begins by identifying the liquid, its location, and the desired outcome, such as leak indication or level measurement. The designer then considers composition, temperature, container material, contamination, and sensitivity before selecting capacitance, impedance, optical, wetting, or acoustic sensing. The selected approach can then be integrated into the relevant container, pipeline, or industrial system.
Leak monitoring requires detecting liquid presence where it should not occur, while level measurement tracks fluid quantity in a container or pipeline. In material-separation systems, detection supports distinguishing relevant liquid streams, and in process control it supplies information for managing industrial operations. These uses extend across chemical, energy, manufacturing, and environmental settings.
In process-control systems, the sensing signal links a physical liquid condition to an operational decision. Detection may indicate that a fluid has reached a monitored location, that a level has changed, or that a leak requires attention. Engineers must match the sensing mechanism to the fluid, equipment, temperature, contamination risk, and required sensitivity so monitoring remains useful in the intended system.