Brake Fluid Identification via Capillary Chromatography
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Solution Overview
Problem
Conventional brake fluid testing methods are expensive and time-consuming, requiring samples to be sent to off-site laboratories for analysis, which is inefficient and not suitable for rapid identification of new or used brake fluids.
Innovation Solution
A method involving contacting brake fluid with a solvent to create a sample, which is then introduced into a capillary column coated with a polysiloxane stationary phase, allowing the sample to flow and react at an effective temperature to form detectable components, and passing the effluent through a detector for identification using mass spectrometry, allowing for on-site characterization of hydrocarbon and borate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional brake fluid testing methods are used, then accurate identification of brake fluid can be achieved, but the process is expensive and time-consuming requiring off-site laboratory analysis
Solution Approach 1:
The patent extracts the essential testing function from the complex off-site laboratory process and implements it as a portable on-site device. The GC-MS system is miniaturized and made field-deployable, allowing brake fluid identification to be performed at the location rather than requiring sample transport to a laboratory, thus eliminating the time loss while maintaining identification accuracy
Solution Approach 2:
The patent introduces a portable GC-MS system as an intermediary between the brake fluid sample and the identification result. This intermediary device performs the chemical analysis locally, serving as a bridge that eliminates the need for off-site laboratory processing while maintaining the precision of conventional methods
2Measurement precision
If conventional brake fluid testing methods are used, then accurate identification of brake fluid can be achieved, but the process is expensive
Solution Approach 1:
The patent employs disposable capillary columns and single-use sample vials that can be replaced inexpensively. These disposable components eliminate the need for expensive cleaning, maintenance, and calibration of complex instrumentation, significantly reducing the operational costs while maintaining identification accuracy through consistent, factory-calibrated performance
3Productivity
If rapid identification of brake fluid is achieved through on-site testing, then time and cost are reduced, but the device complexity increases
Solution Approach 1:
The patent segments the GC-MS system into distinct functional modules: sample injection unit, capillary column oven, mass spectrometer detector, and data processing system. Each module is independently optimized and can be maintained separately, reducing the operational complexity despite the overall system's advanced capabilities. This modular architecture enables rapid testing while managing device complexity through systematic division of functions
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 rapid and accurate identification of brake fluids, including differentiating between DOT 3, DOT 4, and DOT 5.1 types, without the need for off-site laboratory testing, thereby reducing costs and time while providing precise characterization.
Implementation Method 1
introducing the sample into a first capillary column coated with a first stationary phase and allowing the sample to flow through the first capillary column to produce an effluent stream
Implementation Method 2
the one or more hydrocarbon components and optionally the detectable borate component are identified in the effluent stream by mass spectrometry
Implementation Method 3
the first capillary column is at a temperature effective for a borate ester in the sample, if any, to react with a portion of the solvent to form a detectable borate component
Data Source
AI summary
A method for characterizing a brake fluid, the method comprising contacting a solvent with the brake fluid to provide a sample; introducing the sample into a first capillary column coated with a first stationary phase and allowing the sample to flow through the first capillary column to produce an effluent stream; and passing the effluent stream through a detector to identify one or more hydrocarbon components and optionally a detectable borate component, wherein the first capillary column is at a temperature effective for a borate ester in the sample, if any, to react with a portion of the solvent to form the detectable borate component.