Furan Quantification via Colorimetric Correlation for Transformer Diagnostics
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Solution Overview
Problem
Current methods for diagnosing transformer deterioration, such as those based on furan concentration in insulating oil, are inefficient and require skilled professionals, as they rely on expensive equipment and qualitative analysis, making it difficult to accurately assess transformer health in the field.
Innovation Solution
A method and apparatus that quantify furan concentration using a color reagent reaction, correlating precise HPLC analysis with simple chromaticity values, allowing non-professionals to diagnose transformer deterioration by measuring color-development degrees and applying a diagnostic algorithm based on the degree of polymerization of insulating paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If HPLC analysis is used to quantify furan concentration, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces expensive, complex HPLC equipment with a disposable color reagent kit that includes pre-prepared reagents and simple measurement tools. The color reagent is designed for single-use field testing, eliminating the need for expensive laboratory equipment while maintaining adequate measurement precision for transformer diagnostics.
Solution Approach 2:
The patent substitutes the complex mechanical and chemical HPLC system with a simple colorimetric chemical reaction system. Instead of using high-performance liquid chromatography to separate and quantify furan compounds, the method uses a color reagent that reacts with furan to produce a measurable color change, which can be assessed visually or with simple photometric devices.
2Measurement precision
If HPLC analysis is used to quantify furan concentration, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The color reagent is designed to be self-indicating, where the furan concentration is determined by the intensity of color development rather than requiring complex calibration procedures or skilled interpretation. The reagent package includes instructions and reference materials that enable non-professionals to perform accurate measurements without extensive training in chromatography techniques.
Solution Approach 2:
The patent utilizes colorimetric detection where furan concentration is directly proportional to the color intensity developed by the reaction with aniline-acetate reagent. This visual color change provides an intuitive and easy-to-interpret result that eliminates the need for complex data processing or specialized analytical skills required by HPLC methods.
3Ease of operation
If color reaction method is used for furan diagnosis, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The color reagent is pre-formulated with optimized concentrations of aniline and acetate in a stable solvent system, and the kit includes pre-calibrated reference standards. This preliminary preparation eliminates the need for field technicians to perform complex solution preparations or calibrations, ensuring consistent and precise results while maintaining operational simplicity.
Solution Approach 2:
The patent creates a simplified copy of the laboratory HPLC analysis method by developing a colorimetric assay that replicates the essential measurement function. The color reaction produces a signal (color intensity) that correlates with furan concentration in the same way that HPLC peak areas correlate with concentration, providing a faithful but simpler alternative that maintains measurement precision.
4Measurement precision
If commercial colorimeter is used for quantification, then measurement precision is improved, but device complexity and data processing requirements increase
Solution Approach 1:
The patent extracts only the essential measurement function from complex commercial colorimeters by using simple photometric detection at a single wavelength (520-530 nm). The system eliminates unnecessary features such as multiple wavelength selection, complex data processing software, and expensive hardware components, retaining only the core light-absorption measurement capability needed for furan quantification.
Solution Approach 2:
The patent replaces expensive, complex commercial colorimeters with simple, low-cost photometric devices or even visual color comparison methods. The disposable color reagent kit includes built-in reference standards and calibration materials that eliminate the need for expensive external calibration equipment, providing a complete, self-contained solution that is both simple and precise.
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 accurate, efficient, and cost-effective on-site diagnosis of transformer deterioration, reducing uncertainties and improving management by providing quantitative results and diagnostic criteria for different transformer types, thus enhancing diagnostic accuracy and reducing costs.
Implementation Method 1
a color reagent that reacts with furan to produce a color change
Implementation Method 2
measuring a color-development degree of the extraction solution by making the extraction solution containing furan extracted from an insulating-oil sample mix and react with a color reagent
Implementation Method 3
the precise analysis is to obtain a quantitative value through color column separation based on high performance liquid chromatography (HPLC)
Implementation Method 4
measuring a color-development degree of an extraction solution by making the extraction solution containing furan extracted from an insulating-oil sample
Data Source
AI summary
Disclosed is a method of quantifying furan concentration to efficiently manage a deterioration state of a transformer in the field. The method of quantifying furan concentration includes: measuring a color-development degree of an extraction solution by making the extraction solution containing furan extracted from an insulating-oil sample mix and react with a color reagent; and quantifying furan concentration by correction based on a correlation between a precise analysis and a simple analysis with regard to the color-development degree of the extraction solution, wherein the precise analysis is to obtain a quantitative value through color column separation based on high performance liquid chromatography (HPLC) in a laboratory to analyze a furan compound in insulating oil of a transformer, and the simple analysis is to obtain a chromaticity value in a field with regard to actual transformer samples.