Diamond Coated Electrode for Total Organic Carbon Analysis
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Solution Overview
Problem
Existing methods for measuring carbon in aqueous samples using electrochemical oxidation face challenges such as electrode contamination, corrosion, and insufficient oxidation, particularly with conventional carbon-based and diamond-like film electrodes.
Innovation Solution
A carbon measurement apparatus and method utilizing diamond-coated electrodes, which may be doped with boron for conductivity, within a reaction chamber, applying controlled voltage to produce carbon dioxide, and a detection system to quantify CO2 concentrations in both gas and liquid phases, minimizing electrode contamination and optimizing self-cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional carbon-based or metal electrodes are used for electrochemical oxidation, then the device complexity is reduced, but electrode contamination and corrosion increase, leading to shorter lifespan
Solution Approach 1:
The patent uses diamond-coated electrodes where a diamond layer is deposited onto a metal substrate (such as platinum, stainless steel, or nickel). This composite structure combines the conductivity and mechanical strength of the metal substrate with the chemical inertness and oxidation resistance of the diamond coating, thereby eliminating electrode contamination and corrosion while maintaining electrical functionality.
2Reliability
If diamond-coated electrodes are used to reduce contamination and corrosion, then electrode lifespan is improved, but oxidation efficiency becomes insufficient
Solution Approach 1:
The patent applies high voltage (typically 10-100 volts or higher) across the diamond-coated electrodes to generate intense electrochemical oxidation conditions. This parameter change in voltage enables the diamond-coated electrodes to achieve sufficient oxidation efficiency while maintaining their resistance to contamination and corrosion, resolving the contradiction between lifespan and productivity.
3Measurement precision
If strong acid and oxidizing agents are used historically for carbon analysis, then measurement precision is improved, but safety hazards and cost increase
Solution Approach 1:
The patent replaces the chemical method (using strong acids and oxidizing agents) with an electrochemical method using diamond-coated electrodes. This substitution eliminates the need for hazardous reagents while achieving accurate carbon measurement through controlled electrochemical oxidation, thereby improving safety without sacrificing measurement precision.
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 accurate and cost-effective measurement of Total Organic Carbon (TOC), Total Inorganic Carbon (TIC), or Total Carbon (TC) with reduced electrode contamination and corrosion, leading to longer electrode lifespan and superior cost efficiency.
Implementation Method 1
measuring carbon as Total Organic Carbon (TOC), Total Inorganic Carbon (TIC) or Total Carbon (TC) using electrochemical oxidation
Implementation Method 2
The method comprises applying a sufficiently controlled voltage to the electrode to produce carbon dioxide
Implementation Method 3
a detection system to quantify CO2 concentrations in the gas phase, liquid phase or a combination of the two
Data Source
AI summary
The present invention provides an apparatus and method for measuring carbon (any one or all of TC, TOC, or TIC) in a sample matrix. In an embodiment, a method for measuring carbon in a sample composition is provided. The method comprises providing an apparatus comprising a reaction chamber and a diamond coated electrode, wherein the diamond coated electrode is doped with boron. The apparatus further comprises a detector. In addition, the method comprises contacting the sample composition with the electrode. The method further comprises applying an alternating current to the electrode at a sufficient voltage to produce carbon dioxide. Moreover, the method comprises measuring the amount of carbon dioxide produced.