Rotating Disk Solvent Removal for LC Detector Sensitivity
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Solution Overview
Problem
Current liquid chromatography detectors face limitations such as low sensitivity, variable response, safety concerns, and frequent maintenance due to incomplete combustion of analytes, especially when dealing with volatile and hazardous solvents, and are not universally applicable across different mobile phases and molecule types.
Innovation Solution
A system that removes volatile solvents from a liquid chromatography effluent stream using a heated rotating disk, followed by conversion of non-volatile analytes with a concentrated energy source, such as an infrared laser, to enhance detectability and universality of detection across various detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heated zone with open flame is used to evaporate mobile phase and volatilize analytes, then analyte conversion to detectable form is achieved, but safety concerns arise due to evaporating flammable solvents and incomplete combustion creates deposits requiring frequent maintenance
Solution Approach 1:
The patent replaces the mechanical/chemical combustion process with a laser-based energy source. The laser provides concentrated energy to volatilize and convert analytes without requiring open flame or high-temperature combustion zones, thereby eliminating safety concerns with flammable solvents and preventing deposit formation that requires maintenance
Solution Approach 2:
The patent changes the energy source parameters from thermal combustion to laser irradiation. This parameter change allows for controlled, localized energy delivery that completely vaporizes solvents and converts analytes to detectable forms without the side effects of incomplete combustion, eliminating both safety hazards and maintenance requirements
2Quantity of substance
If only a fraction of analytes enter the detector, then detector load is reduced, but sensitivity is reduced and detector signal is skewed
Solution Approach 1:
The patent performs preliminary complete conversion of all analytes to detectable forms using laser energy before detection. This preliminary action ensures that 100% of analytes entering the detector are in a detectable state, maximizing sensitivity and eliminating signal skewing while maintaining manageable detector load through efficient energy utilization
3Adaptability or versatility
If a universal detector is designed to work with any mobile phase and molecule type, then detection universality is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal detection system using laser energy that can handle any mobile phase (volatile or non-volatile) and any molecule type (volatile or non-volatile). The laser provides sufficient energy to vaporize solvents and convert all analytes to detectable forms through a single mechanism, achieving multi-functionality without requiring multiple specialized components or complex system architecture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves improved sensitivity, linear dynamic range, and carbon-specific response, allowing for efficient and accurate detection and quantification of organic molecules, reducing maintenance needs and safety risks while enabling universal detection with any liquid chromatography device.
Implementation Method 1
a device comprising a heated rotating disk, an inlet for effluent from the liquid chromatograph with the inlet depositing the effluent onto the disk
Implementation Method 2
The non-volatile molecules are converted for detection using a concentrated energy source. Reactions generally convert the organic compounds present in the LC effluent to molecules that are subsequently detectable
Data Source
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AI summary
In the present system and method, a conduit from a LC device continuously transports solvent, buffers, and analytes to the inlet of a solvent removal and analyte conversion device which evaporates the solvents, leaving non-volatile analytes for detection. The device comprises a rotating disk. The liquid chromatograph device can be any device using liquid chromatography to separate molecules. The solvents in the LC effluent can include, but are not limited to, water, methanol, acetonitrile, tetrahydrofuran, an acetone. After removal of the volatile components, the non-volatile analytes are converted with a concentrated energy source so that they may be detectable.