Multi-Unit DSC Layout for High-Throughput Clean Sample Analysis
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Solution Overview
Problem
Conventional differential scanning calorimeters (DSCs) have low sample throughput and require extensive cleaning between measurements, limiting their ability to analyze multiple samples efficiently due to the need to prevent cross-contamination, especially in biological analyses.
Innovation Solution
A DSC instrument with multiple thermal units and a temperature control plate made of diffusion-bonded thermally conductive layers, allowing for simultaneous analysis of multiple samples using disposable sample and reference chips that eliminate the need for cleaning, thereby increasing sample throughput and reducing cross-contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional DSC instruments analyze a single sample during an instrument measurement period, then measurement precision is maintained, but sample throughput is limited
Solution Approach 1:
The instrument is divided into multiple independent measurement units (first DSC unit, second DSC unit, etc.), each capable of analyzing a separate sample simultaneously. This segmentation allows the system to process multiple samples in parallel, dramatically increasing sample throughput from one sample per measurement period to multiple samples per measurement period.
Solution Approach 2:
The temperature control plate serves multiple functions: it provides temperature control for all DSC units simultaneously, acts as a thermal substrate for heat distribution, and enables parallel measurement across multiple samples. This multi-functionality allows the instrument to maintain precise temperature control across all units without requiring separate control systems for each, thereby increasing throughput without proportionally increasing device complexity.
2Reliability
If cleaning is performed between sample measurements to reduce cross-contamination, then measurement reliability is improved, but loss of time increases
Solution Approach 1:
The instrument uses disposable sample cells and reference cells that are discarded after a single use. This eliminates the need for cleaning between measurements entirely, as each new sample uses a fresh, sterile cell. The disposable nature of these components prevents cross-contamination while eliminating the time-consuming cleaning process, directly resolving the contradiction between reliability and time loss.
Solution Approach 2:
Instead of cleaning and reusing sample cells, the system discards used cells and replaces them with new ones. This approach prioritizes preventing cross-contamination through disposal rather than recovery and cleaning, significantly reducing the time lost to cleaning operations while maintaining high measurement reliability.
3Temperature
If the temperature control plate uses a single layer of thermally conductive material, then manufacturing simplicity is maintained, but temperature uniformity across multiple DSC units deteriorates
Solution Approach 1:
The temperature control plate is constructed from multiple layers of different thermally conductive materials, each layer contributing specific thermal properties. This composite structure enables superior temperature uniformity across the plate surface by combining materials with complementary thermal characteristics, ensuring all DSC units receive consistent temperature control despite the increased manufacturing complexity.
Solution Approach 2:
Different regions of the temperature control plate utilize different thermal conductivity properties through the layered structure. The composite materials are arranged to provide optimized thermal distribution to each DSC unit position, ensuring local temperature uniformity across the entire plate surface while accommodating the varied thermal requirements of multiple simultaneous measurements.
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
The solution enables the simultaneous analysis of multiple samples, significantly increasing sample throughput and eliminating the need for cleaning between measurements, thus reducing sample aging issues and preventing cross-contamination.
Implementation Method 1
The first thermal substrate provides a substantially uniform temperature across a surface of the thermal substrate
Implementation Method 2
The first thermal substrate may comprise a plurality of layers of thermally conductive material wherein one or more of the layers has a thermal conductivity that is different from a thermal conductivity of one of the other layers. The layers may be diffusion-bonded to each other.
Data Source
AI summary
Described is a differential scanning calorimeter (DSC) instrument capable of performing analyses of multiple samples at the same time. Some embodiments of DSC instruments described herein include a thermal substrate that provides a substantially uniform temperature across a surface of the substrate. A plurality of DSC units is in thermal communication with the substrate, for example, by mounting the units directly to the surface of the substrate. Each DSC unit includes a second thermal substrate for further thermal isolation, and a reference platform and sample platform to receive a reference cell and a sample cell, respectively. A thermoelectric device is disposed between each platform and the second thermal substrate. Optionally, the reference and sample cells may be disposable chips that can be discarded after measurement are performed, thereby reducing or eliminating the need to clean instrument components to prevent cross-contamination for subsequent instrument operation.