Sealed Sampler With Vacuum And Heating For Elemental Analysis
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Solution Overview
Problem
Existing samplers for elemental analyzers fail to effectively eliminate residual adsorbed gases, water vapor, and volatile compounds from samples, leading to contamination and inaccuracies in nitrogen and oxygen determination, as well as isotopic ratio analysis.
Innovation Solution
A fully sealed sampler with heating and vacuum capabilities, combined with an inert gas system, ensures that samples are maintained in a controlled environment, eliminating atmospheric contamination and allowing for simultaneous equilibration and preparation of samples, ensuring identical treatment and improved analytical accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a non-sealed sampler is used, then the device complexity is reduced and ease of operation is improved, but atmospheric contamination affects nitrogen and oxygen determination and isotopic ratio accuracy
Solution Approach 1:
The patent implements a fully sealed sampler system that maintains an inert atmosphere (nitrogen or helium) throughout the sample handling pathway. The sampler housing, transfer lines, and combustion chamber are all sealed and purged with inert gas to prevent atmospheric contamination. This ensures that nitrogen and oxygen determination, as well as isotopic ratio measurements, are not affected by air contamination while maintaining ease of operation through automated sample introduction.
Solution Approach 2:
The patent employs disposable sealed sample cups (tin or silver) that are hermetically sealed before sample introduction. These single-use containers eliminate the need for complex cleaning and validation procedures, allowing easy operation while ensuring that no atmospheric contamination occurs during sample transfer. The disposable nature maintains measurement precision without complicating the operational workflow.
2Loss of time
If residual adsorbed gases and volatile compounds are not eliminated, then the loss of time for sample preparation is reduced, but contamination affects element percentage results and isotopic ratio accuracy
Solution Approach 1:
The patent implements a preliminary vacuum treatment step that occurs automatically as part of the standardized sample preparation protocol. Samples are subjected to vacuum conditions before analysis to remove adsorbed gases and volatile compounds. This preliminary action ensures measurement precision without significantly increasing preparation time, as the vacuum step is efficiently integrated into the automated workflow.
Solution Approach 2:
The patent utilizes controlled temperature and pressure parameter changes during sample preparation. Samples are heated under vacuum conditions to desorb residual gases and volatile compounds before analysis. This parameter-controlled approach effectively eliminates contamination affecting element percentage and isotopic ratio results while maintaining efficient preparation times through optimized heating cycles.
3Device complexity
If samples are not treated under identical standardized conditions, then the device complexity is reduced, but the reliability and repeatability of analysis results deteriorate
Solution Approach 1:
The patent implements a universal standardized preparation protocol that applies to all sample types (solid and liquid) using the same sampler system. The fully sealed design with integrated vacuum, heating, and inert gas purification functions provides multi-functionality that ensures identical treatment conditions for all samples. This universal approach enhances reliability and repeatability without requiring separate complex systems for different sample types.
Solution Approach 2:
The patent incorporates automated control systems with feedback mechanisms that monitor and maintain standardized preparation conditions for all samples. Temperature, pressure, and gas flow parameters are continuously monitored and adjusted to ensure identical treatment conditions. This feedback control ensures high reliability and repeatability of results while the automation reduces operational complexity.
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 sampler achieves 'zero blank' contamination, enhances isotopic composition accuracy, and allows for simultaneous preparation and analysis of samples in standardized conditions, improving the reliability and repeatability of elemental and isotopic analysis results.
Implementation Method 1
means for heating the samples and the sampler housing
Implementation Method 2
means, such as vacuum system, for pumping environmental gases and vapors out of the sample housing 2
Implementation Method 3
an inert gas circuit (21) capable of purging the sample housing (2) with an inert gas
Data Source
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AI summary
A sampler (200) for an elemental analyzer (100) comprises a sample housing (2) suitable to accommodate one or more samples, sealed in tin or silver capsules, to be analyzed, closure means (3, 4) suitable to reversibly close the sample housing (2), a sample passage (5) having a connection opening (18') for the passage by gravity of the one or more samples from the sampler (200) into the analyzer (100) through the connection opening (18'). The sampler (200) further comprises means (19) for heating the sample housing (2) and means (P) for pumping out environmental gases and vapors from the sample housing (2).