Adjustable Flow Cell for Radio-Detector Linear Range
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Solution Overview
Problem
Radio-detectors used in determining radiochemical purity have a limited linear range, making it challenging to accurately detect both high and low radioactive concentration samples without requiring manual adjustment and re-qualification, which can be time-consuming and inconvenient.
Innovation Solution
A radio-detector system with a flow cell featuring discreetly-selectable fluid conduits of varying dimensions allows for adjustable volume settings, enabling the detection of a wide range of chromatography conditions without affecting the detector's qualification status, by selecting the appropriate fluid conduit for the sample's radioactive concentration and flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radio-detector uses a fixed volume flow cell, then the detector is simple to operate and maintain, but the linear detection range is limited and cannot accommodate both high and low radioactive concentration samples
Solution Approach 1:
The flow cell volume is made dynamically adjustable through multiple selectable configurations (different tubing lengths: 5cm, 10cm, 15cm, 20cm, 25cm, 30cm). This allows the system to adapt to different radioactive concentration levels by selecting the appropriate flow cell volume, thereby expanding the linear detection range while maintaining measurement precision across varying sample conditions.
Solution Approach 2:
The invention changes the physical parameter of flow cell volume to resolve the contradiction. By providing multiple discrete volume options, the system can optimize the detection parameters for different sample types (high RAC vs. low RAC samples), enabling accurate detection across a wide linear range without compromising measurement precision.
2Adaptability or versatility
If the radio-detector volume is adjusted manually, then the linear detection range can be expanded, but the operation becomes complex and requires re-qualification
Solution Approach 1:
The flow cell volume adjustment is segmented into discrete, pre-defined configurations rather than continuous manual adjustment. This segmentation into standard volumes (corresponding to different tubing lengths) simplifies operation by providing clear, selectable options while still achieving the needed adaptability for different sample types.
Solution Approach 2:
The flow cell assembly is designed with multi-functionality, where a single assembly can be configured for different volumes by selecting different tubing lengths. This universal design allows the same basic structure to serve multiple detection ranges, maintaining ease of operation while expanding versatility.
3Adaptability or versatility
If the detector requires manual intervention for volume adjustment, then the linear range can be adapted, but time is lost due to disassembly and re-qualification
Solution Approach 1:
The different tubing lengths are pre-configured and ready for selection, eliminating the need for real-time assembly or disassembly. The preliminary preparation of multiple fixed-length tubing options allows for rapid switching between detection ranges, significantly reducing the time required to adapt the detector to different sample conditions.
4Adaptability or versatility
If commercially available adjustable volume detectors are used, then the linear range can be modified, but the system complexity increases and re-qualification is required
Solution Approach 1:
The volume adjustment capability is segmented into discrete tubing length options rather than requiring a complex continuously adjustable mechanism. This segmentation achieves adaptability while keeping the device structure relatively simple, avoiding the need for complex motors, sensors, or control systems.
Solution Approach 2:
Instead of designing a completely new complex adjustable detector, the invention uses a simplified approach by copying the basic flow cell structure with variations in tubing length. This maintains the simplicity of the original design while achieving the needed adaptability through straightforward geometric modifications.
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 solution expands the linear detection range of radio-detectors, allowing for accurate detection of both high and low radioactive concentration samples without the need for manual intervention or re-qualification, improving the efficiency and cost-effectiveness of radiochemical purity analysis.
Implementation Method 1
a flow cell which comprises a plurality of discreetly-selectable fluid conduits (4a-c) each defining an elongate fluid passageway (9a-c)
Implementation Method 2
Each of the fluid conduits (4a-c) extends through the flow cell (1) and is positioned in radio communication with a radio-detector (20)
Data Source
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AI summary
The present invention provides a flow cell that can be used to improve the linear detection range of a radio-detector. The flow cell of the present invention is simple and cost-effective to set up and provides technical advantages over methods known in the prior art, as set out in more detail hereunder. The present invention also provides a method to determine the RCP of a radioactive composition making use of said flow cell, and a HPLC system comprising said flow cell.