Unique Organic-Inorganic Hybrid Copper(I) Phosphate with Ultralow Ractopamine Detection Limit and In Situ Sensing...

Area of Science:

• Materials Science
• Chemistry
• Analytical Chemistry

Background:

• Development of novel hybrid materials for sensing applications.
• Challenges in achieving high sensitivity and selectivity in biosensors.
• Need for advanced analytical techniques for food safety.

Purpose of the Study:

• Synthesize and characterize a new organic-inorganic hybrid metal phosphate, NTOU-10.
• Develop a NTOU-10 based electrode for ultrasensitive ractopamine (RAC) detection.
• Evaluate the performance of the NTOU-10@polypyrrole electrode in real-world samples and a flow injection analysis system.

Main Methods:

• Hydrothermal synthesis of NTOU-10.
• Structural characterization using single-crystal X-ray diffraction, NMR, XPS, and TGA.
• Fabrication of NTOU-10@polypyrrole (PPy) electrodes.
• Electrochemical sensing of RAC using cyclic voltammetry and chronoamperometry.
• Detection of RAC in spiked pork samples and integration into a flow injection analysis (FIA) system.

Main Results:

• Successful synthesis and characterization of NTOU-10 with unique coordination bonding.
• Development of NTOU-10@PPy electrode with an unprecedented limit of detection (LOD) of 3.31 × 10⁻¹⁹ M for RAC.
• Demonstrated real-world applicability by detecting RAC in spiked pork samples.
• Integration into an FIA system for rapid, convenient, and low-sample-volume RAC detection.

Conclusions:

• NTOU-10 represents a novel class of hybrid metal phosphates with potential for advanced applications.
• The NTOU-10@PPy electrode offers a highly sensitive and selective platform for RAC detection.
• This work paves the way for developing high-performance biosensors for food safety and other analytical challenges.