Absorptiometry Reagent Detection via Multi-Wavelength Color Analysis
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Solution Overview
Problem
Current methods for monitoring water quality in facilities using absorptiometry are unreliable and costly due to the complexity of detecting reagent addition, especially when multiple reagents are involved, leading to incorrect judgments and potential apparatus damage.
Innovation Solution
A method involving the use of acid-base indicators and pH regulators to create distinct color changes in the measuring water, allowing for reliable detection of reagent addition by calculating absorbances across different light regions, thereby simplifying the detection process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reagents are added to sample water for concentration measurement, then measurement accuracy is improved, but device complexity and cost increase due to need for multiple detection systems
Solution Approach 1:
The patent combines multiple reagent detection functions into a single integrated detection system. By using one light emitting device and one light receiving device to measure absorbance at multiple wavelengths, the system can detect multiple reagents simultaneously without requiring separate detection systems for each reagent, thus reducing device complexity while maintaining measurement accuracy
Solution Approach 2:
The detection system is designed with multi-functionality to handle multiple reagents. The single detection system can measure absorbance at different wavelengths to identify and quantify different reagents, making the system universal rather than requiring specialized detection equipment for each specific reagent type
2Reliability
If indicator is added to reagent for non-addition detection, then reliability of reagent addition judgment is improved, but device complexity and cost increase due to multiple light emitting and receiving devices
Solution Approach 1:
The patent merges the detection of reagent presence and indicator presence into a single detection system. By measuring absorbance at multiple wavelengths with one light emitting device and one light receiving device, the system can distinguish between reagent color and indicator color, achieving reliable detection without requiring multiple separate detection systems
Solution Approach 2:
The system uses parameter changes in absorbance measurements at different wavelengths to differentiate between reagent and indicator. By analyzing absorbance values at multiple wavelengths, the system can determine whether the observed color is from the reagent or the indicator, enabling reliable detection of reagent addition status
3Productivity
If reagent pump operates continuously for long time, then productivity is improved, but reliability decreases due to inability to detect pump failure and reagent non-addition
Solution Approach 1:
The system implements feedback by continuously monitoring the color of measuring water through absorbance measurements. The detection system provides real-time feedback on whether reagents are being properly added to sample water, allowing the system to detect pump failures or reagent depletion even during continuous operation, thus maintaining reliability while preserving productivity
Solution Approach 2:
The system performs preliminary detection of reagent addition status by measuring the color of measuring water before final concentration measurement. This preliminary action ensures that reagents are properly added and the system is in the correct state for accurate measurement, preventing errors due to pump failure or reagent depletion
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
This method enables reliable and cost-effective judgment of reagent addition, preventing errors in water quality monitoring and reducing the complexity of the monitoring apparatus.
Implementation Method 1
selecting one acid-base indicator which can develop respectively different colors other than the specific color in a first pH range including the specific pH range, and a second pH range deviating from the first pH range
Implementation Method 2
a step of calculating each of absorbances with respect to a red region component light, a green region component light, and a blue region component light obtained by dividing a light in a visible light region of a transmitted light of the measuring water into nearly three parts by emitting a light to the measuring water
Implementation Method 3
the concentration of the specific dissolved substance is automatically measured by absorptiometry using an absorbance of transmitted light
Data Source
AI summary
In measuring a dissolved substance, a concentration of a specific dissolved substance in a sample water is measured using a measuring water W1 developing a specific color within a specific pH range by adding each of two reagents to a sample water W0, and an acid-base indicator S developing different colors other than the specific color is selected in a first pH range including the specific pH range and a second pH range deviating from the first pH range. Next, a reagent is prepared by adding the acid-base indicator to one reagent wherein a pH value of a reagent added water where the two kinds of reagents are separately added to the sample water is within the second pH range. Next, absorbance values are calculated by three region component lights which are a transmitted light in the measuring water wherein the prepared reagent is added.