Binary Syringe Pump HPLC System Flow Continuity
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Solution Overview
Problem
Conventional HPLC systems require complex dual gradient systems to achieve fast analysis times and increased sample throughput, leading to increased complexity and potential interruptions in flow through the analytical column during sample loading and equilibration processes.
Innovation Solution
A single binary syringe pump system with independent pump heads and multi-position valves, connected via T-pieces and flow sensors, allows for synchronized operation with a pre-column switching valve and injection valve, enabling all necessary HPLC functions, including sample loading, chromatography, and column conditioning without interrupting the flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual gradient system with two HPLC systems is used to ensure continuous flow through the analytical column during sample loading and equilibration, then the flow continuity is maintained, but the device complexity increases significantly
Solution Approach 1:
The patent merges the functions of two separate HPLC systems into a single binary syringe pump system. The first pump handles mobile phase A and the second pump handles mobile phase B, both feeding into a common valve circuit that directs flows to the analytical column. This consolidation maintains flow continuity while reducing overall system complexity by eliminating redundant components.
Solution Approach 2:
The binary syringe pump system performs multiple functions: it acts as both the gradient pump and the flow continuity maintainer during sample loading and equilibration. The valve circuit is designed to route flows from either pump to the analytical column as needed, making the system universally capable of handling both analysis and preparation functions with a single integrated unit.
2Productivity
If two or more pumps are used to prevent flow interruption during sample loading and column equilibration, then the analysis throughput increases, but the device complexity increases
Solution Approach 1:
The system segments the mobile phase delivery into two independent binary pumps, each capable of operating autonomously. The first pump is dedicated to mobile phase A and the second to mobile phase B, with each having its own syringe and pump head. This segmentation allows flexible control of each phase independently while maintaining overall system simplicity through modular architecture.
Solution Approach 2:
The valve circuit acts as an intermediary between the two binary pumps and the analytical column. It intelligently routes flows from either pump to the column based on operational requirements, enabling seamless transitions between sample loading, equilibration, and analysis modes without requiring complex coordination between multiple pump systems.
3Device complexity
If a single binary syringe pump system is used to simplify the HPLC system structure, then the device complexity is reduced, but the capability to maintain continuous flow during sample loading and equilibration may be compromised
Solution Approach 1:
The binary syringe pump system employs dynamic valve switching to adapt flow paths in real-time. During sample loading, the valve routes flow from the first pump through the injection valve and pre-column. During equilibration, it switches to route flow from the second pump. This dynamic reconfiguration maintains flow continuity while keeping the physical system structure simple and integrated.
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 configuration simplifies the HPLC system while maintaining fast analysis times and high sample throughput, ensuring continuous flow and efficient gradient formation, suitable for ultra, micro, and nano HPLC applications.
Implementation Method 1
a single syringe pump system, which is designed as a binary syringe pump system... enables the eluent in the pump head to be pumped into the waste in conjunction with the injection valve and the pre-column switching valve, the two eluents to be fed separately or as a mixture
Implementation Method 2
enables the filling of the respective pump head 3, 5 or the compression of the eluent in the pump head
Implementation Method 3
the two eluents to be fed separately or as a mixture via the pre-column switching valve and the pre-column or directly to the analytical column
Data Source
AI summary
The invention relates to an HPLC analytical instrument comprising an injection port for injecting at least one sample, wherein an injection valve is associated with the injection port, and which further comprises a guard column to which a guard column switching valve is associated. The HPLC analytical instrument further comprises an analytical column and a single syringe pump system, which is configured as a binary syringe pump system. In this binary syringe pump system, each pump has pump heads, each of which in turn has a pump head valve associated with it, and each pump has two independent, separate, and switchable outputs. The individual outputs of the two pumps are connected via T-pieces, with one of the T-pieces being connected to the injection valve and the other of the T-pieces being connected to the guard column switching valve.The invention also relates to the use of the HPLC analysis device in the field of conventional as well as ultra-, micro- and nano-HPLC.