Miniaturised wireless smart tag for optical chemical analysis applications

Area of Science:

• Analytical Chemistry
• Sensor Technology
• Internet-of-Things (IoT)

Background:

• Miniaturized analytical instruments are crucial for mobile sensing.
• Existing mobile chemical sensors often lack integration and portability.
• Radio-frequency identification (RFID) technology offers wireless power and data transfer capabilities.

Purpose of the Study:

• To develop and characterize a novel, miniaturized, and low-cost photometer.
• To integrate photometric sensing with RFID smart card technology for mobile applications.
• To demonstrate the analytical performance of the wireless photometer in practical scenarios.

Main Methods:

• Development of a contactless smart card-based photometer utilizing RFID technology.
• Characterization of a low-power RFID wireless sensor tag with LED/photodiode photometric input.
• Testing the photometer's performance in solution-based colorimetric measurements and ion-selective optode systems.

Main Results:

• The developed photometer is ultra-portable and cost-effective.
• The RFID smart card system enables wireless power and data transfer.
• Analytical experiments demonstrated excellent agreement with a reference laboratory instrument for both dye concentration and potassium ion measurements.

Conclusions:

• The novel smart card-based photometer represents a significant advancement in mobile chemical sensing.
• The device leverages RFID technology for seamless integration into the Internet-of-Things (IoT).
• This technology enables numerous mobile, wearable, and vanguard chemical sensing applications in a connected world.