Paper-based manganese and β-cyclodextrin sensors for colorimetric sulfur dioxide detection

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Sulfur dioxide (SO2) is a critical analyte in food and beverage quality control.
• Existing SO2 detection methods can be complex or lack practicality for field applications.

Purpose of the Study:

• To develop a novel, rapid, and practical colorimetric sensor for sulfur dioxide detection in aqueous solutions.
• To investigate the role of β-cyclodextrin in stabilizing paper-based sensors.

Main Methods:

• Modification of filter paper with β-cyclodextrin and manganese compounds.
• Colorimetric analysis of sulfur dioxide presence in aqueous samples.
• Optimization of sensor components and reaction conditions.
• Mechanistic studies involving oxidation-reduction reactions.

Main Results:

• The developed sensor provides a complete color change in under 5 minutes.
• Achieved a limit of detection as low as 33 ppm for sulfur dioxide.
• Demonstrated broad applicability across various pH values.
• β-cyclodextrin effectively prevented filter paper degradation.

Conclusions:

• The novel method offers a rapid, sensitive, and practical approach for sulfur dioxide detection.
• The findings support the use of β-cyclodextrin as a stabilizer in paper-based chemical sensors.
• This technology has potential applications in the food and beverage industry for SO2 monitoring.