Lab-on kit: A 3D printed portable device for optical and electrochemical dual-mode detection

Area of Science:

• Analytical Chemistry
• Electrochemistry
• Spectrophotometry

Background:

• Combining electrochemical and optical methods in portable devices is challenging.
• Enhanced information on complex chemical systems requires integrated analytical techniques.

Purpose of the Study:

• To present a low-cost, portable device integrating spectrophotometric and electroanalytical methods.
• To enable simultaneous measurements for enhanced chemical analysis and result autovalidation.

Main Methods:

• Development of a DIY spectrophotometric device with an electroanalytical cell and screen-printed electrode (SPE).
• Simultaneous spectrophotometric and electroanalytical measurements.
• Testing on mixtures of Patent Blue (E-131) and Brilliant Blue (Erioglaucine E-133).

Main Results:

• The device successfully performed simultaneous spectrophotometric and electroanalytical measurements.
• Simultaneous data allowed for comparison and autovalidation of results.
• The system demonstrated analytical robustness and precision with similar food dyes.

Conclusions:

• The integrated device offers a cost-effective solution for simultaneous electrochemical and optical analysis.
• The DIY approach facilitates accessibility and ease of use.
• The system is suitable for analyzing complex mixtures with similar optical and redox properties.