Dual-Mode Capillary Electrophoresis Scanning for Multi-Capillary Detection
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Solution Overview
Problem
Current capillary electrophoresis instruments can analyze only one sample at a time and require hardware modification and re-validation to switch between detection modes, limiting throughput and efficiency.
Innovation Solution
A dual-mode capillary electrophoresis system using a galvanometric scanning mirror to sequentially direct UV and laser radiation across multiple capillaries, with integrated detectors for UV absorption and laser-induced fluorescence, allowing simultaneous analysis of multiple samples without hardware changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current instruments analyze only one sample at a time, then the detection mode can be maintained, but the instrument throughput is limited
Solution Approach 1:
The system divides the detection task into multiple independent detection channels, each with its own light source and detector, allowing simultaneous analysis of multiple samples. The detection system is segmented into UV detection channel and LIF detection channel, with each channel capable of independent operation on multiple capillaries simultaneously.
Solution Approach 2:
The instrument is designed with multi-functional detection capabilities that can operate in both UV absorption mode and laser-induced fluorescence mode simultaneously or sequentially. The system uses a universal optical platform that accommodates different light sources (UV lamp, laser) and detectors (photodiode, photomultiplier tube) without requiring hardware modification for mode switching.
2Adaptability or versatility
If the detection mode is changed in current instruments, then different analysis capabilities can be achieved, but hardware modification and re-validation are required
Solution Approach 1:
The system incorporates a universal optical platform that supports multiple detection modes (UV absorption and LIF) simultaneously. Different light sources and detectors are integrated into a common optical path system, allowing mode switching through software control rather than hardware modification. The optical bench is designed to accommodate various components without structural changes.
Solution Approach 2:
The system enables dynamic switching between detection modes through software-controlled modulation of light sources and detectors. The galvanometric mirror system dynamically directs light from different sources to appropriate detectors, allowing real-time mode changes without physical reconfiguration or validation procedures.
3Productivity
If a galvanometric scanning mirror is used to direct UV and laser radiation across multiple capillaries, then simultaneous analysis of multiple samples is enabled, but the system complexity increases
Solution Approach 1:
The system merges the UV detection path and LIF detection path into a single optical platform. The galvanometric mirror system serves both detection modes by directing UV radiation to a photodiode detector and laser radiation to a photomultiplier tube detector through the same optical bench, reducing overall system complexity compared to separate independent systems.
Solution Approach 2:
The galvanometric mirror acts as an intermediary that dynamically routes light from different sources (UV lamp, laser) to appropriate detectors based on the selected detection mode. This intermediary component enables flexible mode switching and multi-capillary analysis without requiring complex mechanical reconfiguration of the entire optical system.
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
Enables simultaneous analysis of multiple samples in both UV absorption and laser-induced fluorescence modes, enhancing throughput and eliminating the need for hardware modifications during mode switching.
Implementation Method 1
a first detector positioned relative to the capillaries so as to receive at least a portion of the UV radiation passing through each of the capillaries
Implementation Method 2
laser radiation can excite fluorescent label(s) attached to samples disposed in the capillaries. In some embodiments, ultraviolet (UV) radiation can be employed to excite native fluorescence of biologic samples
Implementation Method 3
at least a portion of fluorescent radiation emitted by a sample disposed in each of the capillaries in response to excitation of the sample in that capillary by the laser light
Data Source
AI summary
In one aspect, a dual-mode capillary electrophoresis system is disclosed, which comprises a plurality of capillaries for receiving a plurality of samples, a UV radiation source for generating UV radiation along a first path, a laser light source for generating laser radiation along a second path, and a galvanometric mirror configured to receive radiation from said UV radiation source along said first path and to receive light from said laser light source along said second path, and to direct said received UV radiation and said laser light onto a common optical path, said galvanometric mirror further being configured to scan said UV radiation and said laser light sequentially over said plurality of capillaries. The system can further include detectors for detecting the UV radiation as well as fluorescent radiation emitted by the samples in response to laser excitation.