Tip Rack Segmentation for Contamination Control
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Solution Overview
Problem
Automated analytical systems face challenges in efficiently isolating and analyzing analytes due to contamination issues with pipette tips, particularly in nucleic acid analysis, where re-use of tips is limited due to contamination, leading to increased disposable consumables and costs.
Innovation Solution
A method and system that utilize a tip rack with independent chambers for two types of pipette tips, allowing re-use and minimizing contamination through precise positioning and alignment of the tips, and a multiwell plate with magnetic separation capabilities for efficient analyte processing and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pipette tips are re-used for multiple processing steps, then cost is reduced and productivity is improved, but contamination risk increases and reliability deteriorates
Solution Approach 1:
The tip rack is divided into multiple independent chambers, each dedicated to holding pipette tips for specific processing steps. This segmentation prevents cross-contamination between steps while allowing systematic re-use of tips within controlled compartments, resolving the contradiction between productivity improvement through tip re-use and reliability maintenance through contamination control.
Solution Approach 2:
The tip rack serves as an intermediary structure that mediates between the need for tip re-use (productivity) and contamination prevention (reliability). By providing dedicated chambers with separation walls and defined access points, the rack enables tips to be transferred between processing steps without direct exposure to contaminants, allowing systematic re-use while maintaining reliability.
2Reliability
If multiple disposable consumables are used to avoid contamination, then reliability is improved, but cost increases and productivity decreases
Solution Approach 1:
Pipette tips are pre-loaded into dedicated chambers of the tip rack before processing begins. This preliminary organization allows tips to be systematically transferred and re-used across multiple processing steps without requiring repeated disposal and replacement, thereby improving productivity while maintaining contamination control through the structured chamber design.
Solution Approach 2:
The tip rack structure serves multiple functions simultaneously: it stores tips for different processing steps, provides physical separation to prevent contamination, enables systematic tip transfer between steps, and allows tips to be re-used across multiple operations. This multi-functionality resolves the contradiction by providing reliability through contamination control while improving productivity through reduced consumable usage.
3Device complexity
If a single tip rack design is used for all pipette tip types, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
Different chambers within the tip rack are designed with locally optimized characteristics suitable for specific pipette tip types and processing steps. Each chamber can have tailored dimensions, opening configurations, and separation wall heights to accommodate different tip sizes and shapes, enabling the single rack structure to adapt to multiple tip types while maintaining overall design simplicity.
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 reduces the need for disposable consumables, lowers costs, and enhances the efficiency of analyte isolation and detection by enabling re-use of pipette tips and effective magnetic separation, improving throughput in automated analytical systems.
Implementation Method 1
a magnetic separation station (201) constructed and arranged to separate an analyte from other material present in a liquid sample
Data Source
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AI summary
A method for separating and analyzing an analyte is provided which comprises, in a first position, transferring a liquid sample to a multiwell plate with a pipette tip, replacing the tips in the tip rack in the same position, and re-using the pipette tips for aspirating and dispensing liquid.