HPLC Deaerator with Dynamic Temperature Control
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Solution Overview
Problem
The varying temperature of the environment affects the state of dissolved gases in the eluting solution used in HPLC, leading to unstable analysis results, particularly in measuring glycohemoglobin, as the ratio of oxyhemoglobin to deoxyhemoglobin changes with temperature, making it difficult to accurately measure glycohemoglobin density due to the longest absorption wavelength of oxyhemoglobin being used.
Innovation Solution
The method involves opening the diluted sample to air for one minute or more to achieve an oxygen saturation of 85% or more, and using a deaeration unit with temperature-measured control to maintain constant dissolved oxygen levels in the eluting solution, regardless of environmental temperature, by adjusting the decompression degree and detention time in the decompression spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a deaerator with constant decompression degree and detention time is used, then the device complexity is reduced and operation is simplified, but the analysis result stability deteriorates when environmental temperature varies
Solution Approach 1:
The deaerator dynamically adjusts the decompression degree and/or detention time based on the detected temperature of the eluting solution. The control unit modifies operational parameters in real-time according to temperature variations, transforming the static deaerator into a dynamic system that adapts to environmental changes while maintaining stable dissolved oxygen removal performance
Solution Approach 2:
The system changes physical parameters (decompression degree and/or detention time) of the deaerator based on temperature measurements. When temperature varies, the control unit adjusts these parameters to compensate for changes in gas solubility, ensuring consistent deaeration effectiveness across different environmental conditions
2Reliability
If the decompression degree and detention time are adjusted according to temperature, then the analysis result stability is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The system implements a feedback control mechanism where a temperature detector continuously monitors the eluting solution temperature and sends signals to the control unit. The control unit processes this feedback information and automatically adjusts the decompression degree and/or detention time, creating a closed-loop control system that maintains optimal deaeration without requiring complex manual intervention
Solution Approach 2:
The deaerator system performs self-adjustment based on temperature feedback. The control unit automatically modifies operational parameters without external intervention, allowing the system to self-regulate and maintain stable performance across varying environmental conditions while minimizing operator burden
3Adaptability or versatility
If the dissolved oxygen level in eluting solution varies with temperature, then the eluting solution can adapt to different temperatures, but the measurement precision of glycohemoglobin deteriorates
Solution Approach 1:
The system compensates for temperature-induced variations in dissolved oxygen by adjusting deaeration parameters (decompression degree and/or detention time). This maintains consistent dissolved oxygen levels in the eluting solution across different temperatures, ensuring accurate glycohemoglobin measurements are not affected by thermal variations
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 approach stabilizes the analysis results by maintaining constant dissolved oxygen levels in the eluting solution, ensuring accurate measurement of glycohemoglobin density across varying environmental temperatures.
Implementation Method 1
a deaerator 95, there exists one that is configured so as to absorb and remove the dissolved gas in the eluting solution by distributing the eluting solution in a gas permeable tube 97 which is arranged in a decompression space 96
Implementation Method 2
decompressing the decompression space 96 by means of a pump 98
Implementation Method 3
opening the diluted sample to air for one minute or more to achieve an oxygen saturation of 85% or more
Implementation Method 4
by continuously measuring an absorbance of the separated liquid in the photometric mechanism 94
Data Source
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AI summary
The present invention relates to a liquid chromatography apparatus (X), which is provided with a deaerator (4). The liquid chromatography apparatus (X) is further provided with a dissolved oxygen density adjusting means for maintaining a density of dissolved oxygen in an eluting solution to be supplied to a column (60) constant. Means for improving a degree of oxygen saturation of the sample are further provided in the tank (53)