Chromatographic Control Device Flow Rate Management
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Solution Overview
Problem
In chromatography, selecting appropriate analysis conditions for columns can lead to damage due to excessive load, as the optimal combination of column filler, dimension, temperature, mobile phase type, pH, and flow rate must be carefully managed.
Innovation Solution
A chromatographic control device that registers and manages flow rates of the mobile phase in association with column specifying information, selects appropriate columns, and controls the chromatograph to prevent excessive flow rates, thereby protecting the column from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the user performs analysis by selecting various combinations of analysis conditions (column filler, dimension, temperature, mobile phase type, pH, flow rate), then the analysis capability and versatility are improved, but the risk of column damage increases due to excessive load
Solution Approach 1:
The control device stores in advance appropriate flow rates for each column in a database before actual analysis. When analysis is performed, the device automatically retrieves the pre-stored flow rate corresponding to the selected column, eliminating the need for real-time calculation and ensuring safe operation parameters are applied consistently.
Solution Approach 2:
The control device includes a flow rate acquisition unit that retrieves the stored flow rate based on the selected column, and an analysis control unit that uses this retrieved flow rate to control the mobile phase supply. This feedback mechanism ensures the system automatically adjusts parameters according to the selected column characteristics, preventing excessive load while maintaining analysis versatility.
2Productivity
If the flow rate of mobile phase is increased to improve analysis speed and productivity, then the productivity is improved, but the column may be damaged by excessive load
Solution Approach 1:
The system changes the flow rate parameter dynamically based on the selected column characteristics. The control device stores different appropriate flow rates for different columns in the database and automatically selects the correct flow rate parameter when analysis is performed, allowing optimization of analysis speed for each specific column without risking damage.
Solution Approach 2:
The appropriate flow rates for different columns are pre-stored in the database before analysis. When a column is selected for analysis, the system retrieves the pre-calculated optimal flow rate from the database, ensuring that the flow rate is optimized for both speed and safety for that specific column type.
Data Source
AI summary
In a chromatograph, a mobile phase is supplied to any of a plurality of columns by a mobile phase supplier, and a sample is supplied to the column by a sample supplier. The sample that has passed through the column is detected by a detector. In a chromatographic control device, a flow rate of the mobile phase for the analysis with use of the column is registered by a flow rate registrar in association with column specifying information for specifying each column. The flow rate of the mobile phase registered in association with a selected column is acquired from registered content of the flow rate registrar. The chromatograph is controlled such that the analysis is performed by an analysis controller while the mobile phase is supplied to the selected column with use of the selected column and the flow rate of the mobile phase acquired by a flow rate acquirer.