Sample Digestion Apparatus with Reflux Cooling
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Solution Overview
Problem
Conventional sample preparation methods for chemical analysis are labor-intensive, time-consuming, environmentally unfriendly, and inefficient, particularly for high-volume laboratories, due to issues such as manual handling of hot acids, high energy consumption, and limited productivity.
Innovation Solution
A container receptacle apparatus with a housing featuring a heating compartment, a cooling compartment, and an insulating region, equipped with an infrared heater and a laser system, which allows for precise temperature control and efficient sample digestion within a micro hot zone while maintaining a cold zone for refluxing vapors, enabling automated and high-throughput sample preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If acid digestion is performed using a hot block with automation, then ease of operation is improved, but loss of substance worsens due to volatile acid emissions
Solution Approach 1:
The patent converts the harmful volatile acid emissions into a beneficial refluxing mechanism. The heating block heats the sample and acid mixture, causing volatile components to evaporate and then condense on the cooled upper portion of the digestion vessel, where they reflux back into the sample. This transforms what would be harmful emissions into a beneficial concentration mechanism that improves digestion efficiency while reducing environmental impact.
Solution Approach 2:
The patent applies different thermal conditions to different parts of the digestion vessel. The lower portion is heated to high temperatures for efficient digestion, while the upper portion is cooled to promote condensation and reflux. This local differentiation of thermal properties enables simultaneous high-temperature digestion and volatile containment within the same system.
2Loss of substance
If microwave acid digestion is used to contain volatile elements, then loss of substance is improved, but productivity worsens due to limited batch capacity
Solution Approach 1:
The patent divides the digestion system into multiple independent heating blocks, each capable of processing one or more samples simultaneously. This segmentation allows parallel processing of multiple batches, significantly increasing overall productivity while maintaining the closed-vessel containment benefits for volatile element prevention.
3Manufacturing precision
If conventional acid digestion with large volumes of acid is used, then manufacturing precision is improved for complete dissolution, but loss of substance worsens due to acid waste
Solution Approach 1:
The patent converts the potentially wasteful evaporation of large acid volumes into a beneficial refluxing process. Volatile acid components evaporate during heating and then condense on the cooled upper portions of the digestion vessels, refluxing back into the samples. This循环利用 (cyclic reuse) of evaporated acid significantly reduces acid consumption and waste while maintaining complete dissolution effectiveness.
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 system enables rapid, automated, and efficient sample digestion with reduced environmental impact, improving productivity and safety by minimizing acid usage and volatile emissions, and maintaining sample integrity for chemical analysis.
Implementation Method 1
Each heating mechanism may include an infrared heater ring disposed within the heating compartment and sized and shaped to receive and encircle the crucible portion of the respective sample container
Implementation Method 2
The laser system is configured to apply a beam of electromagnetic radiation to the sample within the crucible portion of the sample container so as to heat the sample
Implementation Method 3
the cooling compartment is shaped to receive an expansion portion of the sample container... at least one cooling mechanism for cooling the expansion portion of the at least one sample container
Implementation Method 4
an insulating region located between the heating compartment and the cooling compartment for thermally insulating the heating compartment from the cooling compartment
Data Source
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AI summary
A system for preparing samples for chemical analysis comprises at least one sample container, and a container receptacle apparatus for receiving the sample container. The sample container comprises an elongate tubular body having a crucible portion proximal to a closed end for receiving a sample therein, and an expansion portion proximal to an open end. The container receptacle apparatus comprising a housing having a heating compartment, a cooling compartment spaced apart from the heating compartment, and an insulating region located between the heating compartment and the cooling compartment. The heating compartment is shaped to receive the crucible portion of the sample container, and the cooling compartment is shaped to receive the expansion portion of the sample container. The apparatus also includes a heating mechanism for heating the sample within the crucible portion of the sample container, and a cooling mechanism for cooling the expansion portion of the sample container.