Handheld Residual Toxicant Detection Device Using Optical Absorbance
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Solution Overview
Problem
Current methods for detecting residual toxicants in food, such as biochemical and spectrum methods, are not suitable for home use due to complexity, high costs, and inability to effectively detect all pesticides, especially banned ones, and require quantitative sampling and large data comparisons.
Innovation Solution
A handheld residual toxicant detection device using a photo sensing mechanism with a light source and lens to measure absorbance and variation in absorbance of toxicants in an aqueous solution, providing a simple and cost-effective method for detecting residual toxicants at home, with waterproof and wireless charging capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If biochemical methods are used for detecting residual toxicants, then detection capability for organophosphorus and carbamates is achieved, but the method requires fixed specimen sampling, biochemical enzyme reactions, and complicated procedures similar to laboratory operations, making it lowly acceptable and applicable for home use
Solution Approach 1:
The patent replaces complex biochemical mechanical systems (enzyme reactions, specimen sampling procedures) with an optical detection system using light sources, lenses, and photodetectors to measure absorbance of toxicants directly in solution, eliminating the need for complicated biochemical procedures while maintaining detection capability
Solution Approach 2:
The patent changes the detection parameter from biochemical reaction outcomes to optical absorbance measurements, allowing direct quantification of toxicant concentration in aqueous solutions without requiring enzyme-catalyzed reactions or fixed sampling protocols
2Adaptability or versatility
If spectrum methods are used for detecting residual toxicants, then variety and concentration of pesticides can be determined according to spectrum comparison, but database comparison requires large volume of data involving high level of difficulty and cannot avoid quantitative sampling
Solution Approach 1:
The patent extracts only the essential detection function from complex spectrum analysis by using a simple photodetector-based absorbance measurement system that directly quantifies toxicants without requiring large databases or complex spectral interpretation algorithms
Solution Approach 2:
The patent uses a simplified optical measurement approach that copies the essential information needed for toxicant detection (absorbance at specific wavelengths) without replicating the full complexity of spectrum methods and database comparisons
3Measurement precision
If LC/MS/MS or HPLC tests are used for detecting residual toxicants, then accurate detection can be achieved, but the tests are very expensive and time-consuming, making them unusable widely
Solution Approach 1:
The patent employs inexpensive, simple optical components (LED light sources, plastic lenses, photodetectors) that can be mass-produced at low cost, replacing expensive laboratory equipment like LC/MS/MS and HPLC systems, making the technology economically viable for widespread home use
Solution Approach 2:
The patent enables rapid, periodic detection by using simple optical measurements that can be performed quickly without lengthy sample preparation, chromatography separation, or mass spectrometry analysis, significantly reducing detection time
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 effective detection of residual toxicants at home without damaging the object or consuming large power, providing a practical and user-friendly solution by displaying detection results through lamp indications and reducing costs through integrated design.
Implementation Method 1
the absorbance and the variation in absorbance of the residual toxicants continuously detected in a water solution
Implementation Method 2
the photo sensor receives the sensing signal of the light passing through the sensing cavity
Data Source
AI summary
A residual toxicant detection device for testing residual toxicant in an aqueous solution is disclosed, which includes a first space cavity, a second space cavity, a connecting frame and a sensing cavity. The first space cavity includes a light source and a lens. The second space cavity includes a photo sensor and a circuit module. The connecting frame is configured to connect the first space cavity and the second space cavity. The sensing cavity for receiving an aqueous solution is formed between the first space cavity and the second space cavity and at one side of the connecting frame. The light source emits a light with a wavelength range. The photo sensor receives the sensing signal of the light passing through the sensing cavity. The circuit module is configured to calculate the absorbance and the variation in absorbance of the residual toxicants in the aqueous solution.