Multi-Stream Liquid Chromatograph Column Life Management
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Solution Overview
Problem
In multi-stream liquid chromatograph mass spectrometry devices, the simultaneous deterioration of separation columns leads to a significant decrease in throughput and device stoppage, as all streams become unusable when their columns reach the end of life at the same time, which is difficult to control and manage.
Innovation Solution
A control unit compares the remaining usable times of separation columns across multiple liquid chromatographs and strategically selects the one with the smallest number of usable times for continued analysis, ensuring that other streams are used less frequently to prevent simultaneous end-of-life issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple liquid chromatographs are provided in a multi-stream device to increase throughput, then the number of specimens that can be processed per hour increases, but the risk of simultaneous separation column deterioration increases, leading to device stoppage
Solution Approach 1:
The control unit performs preliminary monitoring of separation column usage times and proactively manages stream selection before simultaneous deterioration occurs. By tracking remaining column life and strategically rotating streams, the system prevents the condition where all columns fail at the same time, ensuring continuous operation while maintaining high throughput
Solution Approach 2:
The system dynamically adjusts stream selection based on real-time separation column status. The control unit modifies which streams are active and which are on standby according to column usage patterns, creating a flexible system that adapts to prevent simultaneous column failure while maintaining optimal throughput
2Productivity
If separation columns are used continuously to maintain high throughput, then productivity increases, but the separation columns deteriorate and reach end of life simultaneously, causing device stoppage
Solution Approach 1:
The control unit implements periodic rotation of streams, switching between active and standby modes based on separation column usage. This periodic action distributes wear across multiple columns over time, preventing simultaneous deterioration while maintaining continuous high-throughput operation through strategic stream selection
Solution Approach 2:
The system manages separation column lifecycle by discarding (rotating out) columns that have reached their usage limit and recovering (activating) standby columns that have remaining life. This systematic replacement strategy ensures continuous operation while extending the overall system lifespan through balanced column utilization
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 prevents the simultaneous end-of-life condition of multiple separation columns, maintaining device operation and preventing significant throughput decreases by strategically managing the usage of each stream, thereby extending the life of some columns and avoiding device stoppages.
Implementation Method 1
a plurality of liquid chromatographs 1, 2, 3 each having a separation column 114, 117, 119 for separating a measurement target substance from a sample
Data Source
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AI summary
An analysis device having a liquid chromatograph and a method for analyzing a liquid chromatograph is realized, which is capable of preventing a plurality of separation columns from reaching the end of life and preventing a plurality of streams from being unusable at the same time so as to suppress a significant decrease in throughput and the stoppage of the device. A control unit determines whether a usable stream is 0 or not among streams 1, 2, and 3, and in a case where none of the streams are usable, the control unit skips a sample introduction in the cycle. In a case where there is one usable stream in the cycle, the stream is used. In a case where there are multiple streams that are usable in the cycle, and there are multiple streams of which the remaining number of use of a separation column is the minimum, the stream having the smallest stream number is used. In a case where there is one stream of which the remaining number of use of a separation column is the minimum, the stream to which the separation column having the minimum remaining number of use is connected is used.