Miniaturized Method for Chemical Oxygen Demand Determination Using the PhotoMetrix PRO Application

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Water Quality Monitoring

Background:

• Chemical oxygen demand (COD) analysis is crucial for assessing water pollution.
• Traditional COD methods are costly and generate significant environmental waste.
• Mobile technology offers potential for developing more sustainable analytical techniques.

Purpose of the Study:

• To evaluate a miniaturized method using the PhotoMetrix PRO application for COD analysis.
• To compare the accuracy and efficiency of the mobile method against standard COD testing.
• To assess the environmental benefits, including cost reduction and waste minimization.

Main Methods:

• Utilized the PhotoMetrix PRO application for image acquisition and multivariate analysis.
• Performed statistical analysis to compare results with the standard COD method.
• Assessed changes in analysis cost, waste generation, and time efficiency.

Main Results:

• No significant difference in results was observed compared to the standard method.
• Analysis cost and waste generation were reduced by approximately 33%.
• Analysis time was reduced by approximately 20%, with a 25% improvement in the AGREE score.

Conclusions:

• The miniaturized PhotoMetrix PRO method is a viable and eco-friendly alternative for COD analysis.
• This method reduces environmental impact through decreased chemical usage and waste.
• The approach is suitable for analyzing various water matrices and advanced oxidation processes.