Integrated Optical Conductivity Flow Cell for Liquid Chromatography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid chromatography systems require multiple separate flow cells for measuring optical absorbance and conductivity, which increases complexity, turbulence, and the likelihood of measurement errors due to increased connection points and remixing of separated compounds.
Innovation Solution
A combined flow cell system that integrates optical and conductivity measurements in a single device, using a series of optical flow cell bodies with conductive materials and an insulator to perform both absorbance and conductivity measurements simultaneously, reducing the need for multiple flow cells and minimizing turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate flow cells are used for measuring optical absorbance and conductivity, then measurement functionality is improved, but device complexity and turbulence increase
Solution Approach 1:
The patent combines multiple separate flow cells (optical absorbance flow cell and conductivity flow cell) into a single integrated flow cell assembly. The optical flow cell body contains both the optical measurement cavity and conductivity electrodes, allowing simultaneous multi-property measurements without requiring multiple separate cells connected in series. This merging eliminates the complexity of multiple connection points while maintaining comprehensive measurement capability.
Solution Approach 2:
The flow cell assembly is designed to perform multiple measurement functions simultaneously within a single device. The optical flow cell body incorporates both optical transparency for absorbance measurement and conductivity electrodes for electrical conductivity measurement, making it a universal measurement device that eliminates the need for separate specialized flow cells.
2Adaptability or versatility
If multiple separate flow cells are used for measuring optical absorbance and conductivity, then measurement functionality is improved, but measurement precision deteriorates due to turbulence and remixing
Solution Approach 1:
The patent combines multiple separate flow cells (optical absorbance flow cell and conductivity flow cell) into a single integrated flow cell assembly. The optical flow cell body contains both the optical measurement cavity and conductivity electrodes, allowing simultaneous multi-property measurements without requiring multiple separate cells connected in series. This merging eliminates the complexity of multiple connection points while maintaining comprehensive measurement capability.
Solution Approach 2:
The integrated flow cell design ensures continuous, uninterrupted flow of liquid through a single streamlined path. By eliminating multiple connection points between separate flow cells, the design prevents turbulence and remixing that would otherwise occur at junctions, thereby maintaining measurement precision through continuous laminar flow conditions.
3Adaptability or versatility
If multiple separate flow cells are used for measuring optical absorbance and conductivity, then measurement functionality is improved, but the number of connection points increases
Solution Approach 1:
The patent combines multiple separate flow cells (optical absorbance flow cell and conductivity flow cell) into a single integrated flow cell assembly. The optical flow cell body contains both the optical measurement cavity and conductivity electrodes, allowing simultaneous multi-property measurements without requiring multiple separate cells connected in series. This merging eliminates the complexity of multiple connection points while maintaining comprehensive measurement capability.
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
This design reduces measurement errors, minimizes the number of flow cells, and prevents remixing of separated compounds, enhancing the accuracy and efficiency of liquid chromatography by allowing simultaneous multi-property measurements in a compact format.
Implementation Method 1
An optical flow cell allows transmission of ultraviolet or visible light through liquid flowing therein. The liquid's absorbance can be measured for the purpose of detecting the presence, and determining the concentration, of certain chemical compounds
Implementation Method 2
Electrolytic conductivity of a liquid solution is often related to the ionic concentration of a solution. Measured in conjunction with light absorbance, conductivity provides additional information about the liquid, such as salt concentration and protein concentration. Conductivity is usually determined by measuring the resistance across two electrodes.
Data Source
AI summary
A detector for detecting constituents of a liquid for use in liquid chromatography is disclosed. The detector includes a first optical flow cell body and a second optical flow cell body, each having a channel therethrough that allows passage of a liquid from an inlet port to an outlet port. The first and second optical flow cell bodies are arranged in series such that the liquid exiting the outlet port of the first optical flow cell body enters the inlet port of the second optical flow cell body. An insulator resides between the first optical flow cell body and the second optical flow cell body, which is adapted to electrically insulate the first optical flow cell body from the second optical flow cell body while allowing the liquid to pass from the first optical flow cell body to the second optical flow cell body. The first optical flow cell body is adapted to facilitate measurement of absorption by the liquid of a first wavelength of light, and second optical flow cell body is adapted to facilitate measurement of absorption by the liquid of a second wavelength of light. The first and second optical flow cell bodies are further adapted to perform as electrodes for measuring the conductivity of the liquid.