Lead Testing System Using Plunger-Driven Cotton Filtration
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Solution Overview
Problem
Existing lead testing systems are not accurate and require extremely pure liquid samples to avoid contaminant detection, making them inefficient and difficult to use.
Innovation Solution
A system comprising multiple vessels, plungers, and a housing for filtering samples using nitric acid and cotton balls, followed by heating and analysis, which allows for efficient and accurate lead detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spectrometry is used to analyze the sample, then measurement precision is improved, but the liquid sample must be extremely pure which increases device complexity and reduces ease of operation
Solution Approach 1:
The system divides the sample processing into separate stages: filtration in one vessel and analysis in another. The filtration vessel contains cotton ball filtering means that physically separate the liquid sample from debris and residue, allowing the analyzer to receive only the filtered liquid without requiring the entire sample to be extremely pure.
Solution Approach 2:
A filtering intermediary (cotton ball) is introduced between the sample and the analyzer. This intermediary captures contaminants, debris, and residue while allowing the liquid sample to pass through to the analyzer, thus protecting the spectrometry system from contaminants while maintaining measurement precision.
2Ease of operation
If traditional filtration and dye reaction is used, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The system merges the advantages of both methods: the simple filtration operation of traditional methods is combined with the precise spectrometric analysis. The filtered liquid sample is transferred to a vial for spectrometry, achieving both ease of operation through simple filtration steps and measurement precision through spectrometric detection.
3Measurement precision
If multiple samples are processed sequentially, then measurement precision is maintained, but productivity decreases
Solution Approach 1:
The system uses multiple separate vessels (vials) that can be prepared independently and simultaneously. Each vessel contains its own filtering means and can process a different sample in parallel, allowing multiple lead tests to be conducted at the same time while maintaining the same analytical precision for each sample.
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 provides a simple, efficient, and accurate method for testing multiple samples for lead, ensuring reliable results without the need for highly pure samples.
Implementation Method 1
U.S. Pat. No. 5,567,619 to Stone discloses a process and apparatus for testing lead in a liquid sample by precipitating the lead from a liquid sample and filtering
Implementation Method 2
Each sample is then heated in a separate heating device
Implementation Method 3
a filtering means, such as a cotton ball, is inserted into each vessel. Each plunger then pushes its respective cotton ball into its respective vessel simultaneously so that each liquid sample is filtered adjacent the top of each vessel
Data Source
AI summary
A system for testing multiple samples for the presence of lead includes a plurality of vessels, a plurality of plungers, a housing for removably storing the plurality of vessels, and a retainer for holding the plurality of plungers so that each of the plungers may be inserted into a respective vessel simultaneously. In order to use the system of the present invention, a sample is placed within each of the plurality of vessels and a reagent, such as nitric acid, is added to each sample. Each sample is then heated in a separate heating device and a filtering means, such as a cotton ball, is inserted into each vessel. Each plunger then pushes its respective cotton ball into its respective vessel simultaneously so that each liquid sample is located adjacent the top of each vessel. The plungers are removed and the housing is then placed into an analyzer.