Integrated Viscosity and Light Scattering Detector for Peak Resolution
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Solution Overview
Problem
Existing liquid chromatography detectors for viscosity and light scattering suffer from signal broadening and inter-detector fluidic delays, leading to reduced chromatographic resolution and increased noise due to series or parallel configurations, which also cause sample dilution and backpressure issues.
Innovation Solution
A single unit device integrating a viscometer and light scattering detector with optimized fluid flow lines, tee connectors, and a pressure transducer, minimizing peak broadening and offset, and eliminating the need for complex flow splits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If detectors are disposed in series configuration, then more property information can be obtained from a single chromatographic run, but signal broadening and inter-detector fluidic delays occur leading to reduced chromatographic resolution
Solution Approach 1:
The patent combines multiple detectors (viscometer and light scattering detector) into a single integrated detector unit that shares common fluidic pathways and electronics. This merging eliminates the need for separate detector channels, thereby removing the source of signal broadening and inter-detector delays while maintaining the ability to measure multiple properties simultaneously.
Solution Approach 2:
The integrated detector unit performs multiple detection functions (viscosity measurement and light scattering detection) within a single device. This multi-functionality allows the system to obtain various property information from a single chromatographic run without requiring multiple separate detectors that would cause signal broadening.
2Measurement precision
If mathematical corrections are applied to address signal broadening and inter-detector delays, then detector performance can be optimized, but chromatographic resolution is lowered due to convolution and offset operations
Solution Approach 1:
The patent removes the need for mathematical correction operations by extracting the source of the problem - the separate detector channels that require convolution and offset operations. By integrating detectors into a single unit with shared fluidic pathways, the system eliminates the need for post-processing corrections that degrade chromatographic resolution.
3Manufacturing precision
If viscometer and light scattering detector are integrated in a single unit, then peak broadening is minimized and chromatographic resolution is enhanced, but device complexity increases
Solution Approach 1:
The patent merges the viscometer and light scattering detector into a single integrated unit that shares common fluidic pathways, sample cell, and electronics. This consolidation reduces the overall number of separate components and connections required, thereby simplifying the system architecture despite the advanced functionality provided.
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 integrated device reduces peak broadening, minimizes mathematical corrections, maintains consistent backpressure, and enhances chromatographic resolution by eliminating the need for additional tubing, thus improving detection accuracy.
Implementation Method 1
a light scattering detector
Implementation Method 2
a pressure transducer
Data Source
AI summary
Single unit devices for viscosity and light scattering, and methods for the same are disclosed. The single unit device may include an inlet line, first and second fluid flow lines in fluid communication with the inlet line, a light scattering detector (LSD), a pressure transducer line, a pressure transducer disposed fluidly coupled with the pressure transducer line, and an exit stream. The first fluid flow line may include first and second capillaries and a first tee connector interposed between the first and second capillaries. The second fluid flow line may include first and second capillaries and a second tee connector interposed between the first and second capillaries. The LSD may be disposed downstream the second tee connector and upstream the second capillary of the second fluid flow line. The exit stream may be in fluid communication with the respective second capillaries of the first and second fluid flow lines.