Sol-Gel Detector for Chloramine and Ozone Monitoring
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Solution Overview
Problem
Current methods for measuring chloramines, nitrogen oxides, and ozone in the air are either non-selective and insensitive or require complex, sophisticated equipment, making it difficult to achieve real-time monitoring, which is crucial for health and environmental safety, especially in environments like swimming pools and industrial settings.
Innovation Solution
A multifunctional detector using a sensor comprising an iodide and reactive compounds like starch or polyvinyl alcohol incorporated into a sol-gel material that forms colored complexes with triiodide, allowing for visible detection of gases such as chloramines, nitrogen oxides, and ozone, with optional filtration to isolate specific compounds, enabling continuous, sensitive, and cost-effective monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sophisticated equipment is used for detecting chloramines, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent employs colorimetric detection where the sensor changes color in response to chloramine concentration. The sensor contains compounds that undergo color changes when exposed to chloramines, allowing visual or optical detection without complex instrumentation. This resolves the contradiction by providing sensitive detection through simple color-based measurement rather than complex analytical equipment.
Solution Approach 2:
The patent describes disposable sensor strips or test elements that are inexpensive and single-use. These sensors are pre-prepared with detection compounds and can be discarded after use, eliminating the need for expensive, maintainable equipment while maintaining detection capability. This approach trades device complexity for disposable simple sensors.
2Measurement precision
If sampling time is extended to 1-2 hours for accurate chloramine quantification, then measurement precision is improved, but productivity decreases
Solution Approach 1:
The sensor is pre-prepared with all necessary detection compounds and reagents before use. The detection compounds are pre-loaded into the sensor matrix, so no lengthy sampling or preparation time is needed during actual measurement. This allows rapid detection while maintaining accuracy, as the sensor is ready to react immediately upon exposure to chloramines.
Solution Approach 2:
The patent enables rapid detection by skipping the lengthy sampling and laboratory analysis steps required by traditional methods. The sensor provides direct, on-site measurement within seconds or minutes rather than hours, achieving both speed and accuracy by using a streamlined detection approach that eliminates unnecessary intermediate steps.
3Measurement precision
If selective detection methods are used for chloramines, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor employs specific compounds or molecular structures that are locally positioned within the sensor matrix to detect chloramines selectively. The detection layer contains chemically specific reagents that react only with chloramines or target compounds, providing selectivity through localized chemical properties rather than complex instrumental analysis. This allows selective detection using simple sensor chemistry.
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 detector provides rapid, accurate, and cost-effective continuous monitoring of these air pollutants, facilitating real-time health and environmental assessments and guiding management decisions, such as ventilation adjustments, while being simple to use and maintain.
Implementation Method 1
a multifunctional detector for gaseous compounds or mixtures of gaseous compounds... comprising a first sensor comprising an iodide and a reactive compound... incorporated into a block of sol-gel material
Implementation Method 2
a reactive compound selected from starch, amylose, amylopectin, xyloglucan, xylane, chitosan, glycogen, polyvinyl alcohol or a polyvinyl alcohol compound, cellulose or a cellulose compound... that forms colored complexes with triiodide
Data Source
AI summary
The invention relates to a multifunctional detector for gaseous compounds, or mixtures of gaseous compounds, selected from NH2Cl, NHCl2, NCl3, total chlorine, NOx, where x=1 or 2, O3, and X2, where X=Cl, Br, or I, in a sample, said detector including a first sensor including an iodide and a reactive compound selected from starch, amylose, amylopectin, xyloglucan, xylan, chitosan, glycogen, polyvinyl alcohol, cellulose or a cellulose compound, α-cyclodextrin, theobromine, and polypropylene block polymers and polyethylene oxide block polymers, included in a block of sol-gel material that is absorbent in the UV spectrum but not in the visible spectrum. The invention also relates to the uses of said detector.