Chromatographic Control Device pH Range Compliance
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Solution Overview
Problem
In chromatography, selecting appropriate analysis conditions for columns and mobile phases is challenging, as inappropriate conditions can damage the column, and existing systems lack effective prevention mechanisms.
Innovation Solution
A chromatographic control device that registers pH ranges for each column and mobile phase, selects suitable columns and phases, and controls the chromatograph to prevent the supply of unsuitable mobile phases, ensuring the pH range is within the column's safe limits, thereby preventing column damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user performs analysis of samples with various combinations of analysis conditions to find appropriate conditions, then the ability to determine optimal analysis conditions is improved, but the column may be damaged by application of load depending on the analysis condition
Solution Approach 1:
The system pre-registers the pH ranges suitable for each column and the pH values of each mobile phase before analysis begins. This preliminary registration of compatibility information allows the system to automatically prevent incompatible combinations without requiring real-time manual assessment, thus protecting the column while enabling comprehensive condition optimization.
Solution Approach 2:
The system provides automatic feedback by comparing the pH of selected mobile phases with the registered suitable pH ranges for each column. When an incompatible combination is detected, the system automatically prevents supply of that mobile phase to that column, creating a closed-loop control system that protects the column while guiding the user toward optimal safe conditions.
2Reliability
If the chromatograph controls to prevent supply of mobile phase with pH out of registered range, then column damage is prevented, but the system complexity increases due to pH registration and control mechanisms
Solution Approach 1:
The system performs self-service by automatically managing the pH compatibility information. The chromatograph controller itself carries out the pH range registration, pH value registration, compatibility determination, and supply control functions without requiring external monitoring equipment or manual intervention during operation, thus minimizing additional system complexity.
Solution Approach 2:
The chromatograph controller is designed to perform multiple functions: it controls the mobile phase supply, registers pH ranges for columns, registers pH values of mobile phases, determines compatibility, and prevents incompatible combinations. This multi-functionality consolidates what could be separate complex subsystems into a single integrated controller.
Data Source
AI summary
A range of pH of a mobile phase that is usable for an analysis with use of each column is registered by a pH range registrar in association with identification information of each column. A pH of each mobile phase is registered by a pH registrar. A column to be used for an analysis is selected by a column selector. A chromatograph is controlled by an analysis controller such that a mobile phase having a registered pH that is out of a range of pH that is registered in association with a selected column is not supplied to the selected column. The chromatograph is controlled by the analysis controller such that an analysis is performed while a mobile phase having a registered pH that is in a range of pH that is registered in association with a selected column is supplied to the selected column.