Liquid Chromatograph Valve Switching for Chip and Packed Columns
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Solution Overview
Problem
Existing liquid chromatographs require complicated work to switch between chip columns and packed columns due to their different sizes and structures, necessitating pipe replacement and connection.
Innovation Solution
A liquid chromatograph with a flow-path switching valve that allows seamless switching between a chip column and a packed column, enabling easy selection based on sample or mobile phase type without the need for pipe replacement or connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a packed column is used instead of a chip column, then separation performance may be improved for certain samples, but the complexity of column replacement and attachment increases significantly
Solution Approach 1:
The liquid chromatograph is designed with a universal interface system that can accommodate both chip columns and packed columns. The valve unit and flow path configuration enable a single instrument to perform multiple separation modes without requiring different equipment, thus improving versatility while managing complexity through standardized connections.
Solution Approach 2:
A valve unit acts as an intermediary component between the mobile phase supply and the separation columns. This mediator enables seamless switching between chip columns and packed columns by providing standardized flow path control, eliminating the need for complex pipe replacement and connection operations when changing column types.
2Adaptability or versatility
If a packed column is used, then separation performance may be improved, but the time and labor required for column replacement increases
Solution Approach 1:
The system is pre-configured with multiple flow paths and valve positions that are ready for column switching. The valve unit is designed with pre-established connection points for both chip columns and packed columns, allowing operators to switch between column types without performing complex preparation steps, thus reducing replacement time.
Solution Approach 2:
The valve unit serves as a mediator that simplifies the column switching process. By providing a standardized interface and flow control mechanism, it eliminates the need for time-consuming pipe disconnection and reconnection operations, enabling rapid transition between different column types.
3Ease of operation
If a chip column is used, then workability and maintenance are improved, but versatility for different sample types is reduced
Solution Approach 1:
The liquid chromatograph incorporates a universal flow path system with valve units that can accommodate both chip columns and packed columns. This multi-functional design allows the instrument to maintain the ease of operation associated with chip columns while also supporting packed columns for samples requiring different separation characteristics, thus achieving versatility without sacrificing workability.
4Adaptability or versatility
If manual pipe connection is required for column replacement, then column switching is possible, but operational complexity and error risk increase
Solution Approach 1:
The valve unit acts as an intermediary device that replaces manual pipe connection operations. It provides standardized flow path control with pre-configured connection points, allowing column switching through simple valve operations rather than complex manual piping, thus maintaining versatility while dramatically improving ease of operation and reducing error risk.
Data Source
AI summary
A liquid chromatograph includes a sample supplier that supplies a sample into a mobile phase, a chip column having a flow path that functions as a separation column on a substrate, a packed column, a switcher configured to be switchable between a first state in which a mobile phase and a sample are guided from the sample supplier to the chip column and a second state in which a mobile phase and a sample are guided from the sample supplier to the packed column, and a detector that detects a sample that has passed through the chip column and a sample that has passed through the packed column.