Thiocarbamate Indicator Monochloramine Fluorescence Detection
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Solution Overview
Problem
Conventional methods for measuring chlorine in water, particularly at low concentrations, are inaccurate due to interference from chloramines like monochloramine, and require additional reagents and steps, making them cumbersome and prone to errors.
Innovation Solution
A method using a thiocarbamate indicator and potassium iodide to accelerate the reaction, resulting in a measurable fluorescence intensity that correlates with monochloramine concentration, allowing for precise detection of total chlorine levels below 20 parts per billion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to measure chlorine in water, then measurement can be performed, but measurement precision deteriorates at low concentrations due to interference from chloramines
Solution Approach 1:
The patent extracts and eliminates the interfering substance (chloramine) from the measurement system by using a selective reaction that only measures free chlorine, excluding chloramine interference through the use of a colorimetric indicator that reacts specifically with free chlorine species
Solution Approach 2:
The patent changes the measurement parameter from total chlorine (which includes interfering chloramines) to free chlorine only, by using a colorimetric reaction that is selective for free chlorine species, thereby improving measurement precision at low concentrations
2Measurement precision
If conventional methods are used to measure chlorine, then measurement can be performed, but device complexity increases due to requirement of additional reagents and steps
Solution Approach 1:
The patent uses a multi-functional colorimetric indicator that can detect free chlorine species across a wide range of conditions, eliminating the need for multiple specialized reagents and steps while maintaining detection capability
Solution Approach 2:
The patent skips unnecessary intermediate steps and reagents by using a direct colorimetric reaction that provides rapid measurement of free chlorine, reducing the number of operations required while maintaining precision
3Measurement precision
If conventional methods are used to measure chlorine, then measurement can be performed, but productivity decreases due to cumbersome procedures prone to errors
Solution Approach 1:
The patent implements a rapid colorimetric reaction that completes measurement in minutes, skipping time-consuming steps such as multiple reagent additions, incubation periods, and complex calibration procedures, thereby increasing productivity while maintaining accuracy
Solution Approach 2:
The patent uses a self-indicating colorimetric reaction that produces a visible color change proportional to chlorine concentration, eliminating the need for complex instrumentation or operator intervention, thus improving both speed and accuracy
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 approach provides a faster and more accurate measurement of chlorine concentrations, reducing errors and eliminating the need for traditional DPD chemistry, enabling detection of monochloramine at ultra-low ranges with minimal human intervention.
Implementation Method 1
measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence
Implementation Method 2
adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution
Data Source
AI summary
An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.