Quartz Sample Decomposition Using Mixed Acid Gas
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Solution Overview
Problem
Current methods for decomposing quartz samples to analyze metal contamination are either time-consuming or require pressurized vessels, limiting the efficiency and accuracy of the process.
Innovation Solution
A method involving immersion of a quartz sample in a liquid containing water and a mixed acid of hydrogen fluoride and sulfuric acid, with a specific mole fraction range, to decompose the sample in a sealed vessel without pressurization or heating, facilitating rapid decomposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If liquid phase decomposition method is used, then decomposition time is reduced, but decomposition speed is insufficient compared to pressurized acidolysis
Solution Approach 1:
The invention changes the chemical parameters of the decomposition system by using a mixed acid composition (hydrogen fluoride and sulfuric acid with specific mole ratios) and introducing gaseous HF into the liquid phase, transforming the decomposition kinetics without requiring pressurization
Solution Approach 2:
The invention introduces a gas phase component (hydrogen fluoride gas) into the liquid phase decomposition system, creating a gas-liquid interaction that accelerates decomposition while maintaining atmospheric pressure conditions
2Productivity
If pressurized acidolysis method is used, then decomposition speed is improved, but device complexity increases due to pressure-resistant vessel requirement
Solution Approach 1:
The invention extracts the pressurization requirement from the decomposition system by achieving rapid decomposition through chemical means (mixed acid composition and gas introduction) rather than mechanical pressure, eliminating the need for pressure-resistant vessels
Solution Approach 2:
The invention uses ordinary glass or plastic vessels that are easier to handle and dispose of compared to expensive pressure-resistant vessels, maintaining decomposition effectiveness without requiring durable, complex equipment
3Productivity
If vapor phase decomposition method is used, then decomposition speed is improved, but decomposition time becomes longer compared to liquid phase method
Solution Approach 1:
The invention merges the advantages of both liquid phase and gas phase methods by combining liquid decomposition medium with gaseous HF introduction, achieving rapid decomposition kinetics without the time penalty of pure vapor phase methods
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 quartz sample decomposition in a short time period similar to pressurized acidolysis methods, reducing contamination risks and allowing for effective metal contamination analysis and production of low-contamination quartz members.
Implementation Method 1
contacting a liquid in which at least a part of a quartz sample to be analyzed is immersed with a gas generated from a mixed acid to decompose at least a part of the quartz sample
Implementation Method 2
a gas generated from a mixed acid wherein the mixed acid is a mixed acid of hydrogen fluoride and sulfuric acid
Data Source
AI summary
Provided is a method of decomposing a quartz sample, which includes contacting a liquid in which at least a part of a quartz sample to be analyzed is immersed with a gas generated from a mixed acid to decompose at least a part of the quartz sample, wherein the liquid is a liquid containing at least water; and the mixed acid is a mixed acid of hydrogen fluoride and sulfuric acid, and a mole fraction of sulfuric acid in the mixed acid ranges from 0.07 to 0.40.