Breakthrough in Nanotechnology: New Sensor for Low-Level Milk Allergen Detection

Strategic Insights -

Researchers from Shanxi University in Taiyuan, People's Republic of China, have developed a novel reflective cascaded microfiber optic sensor that can detect low levels of b-lactoglobulin (B-LG) in dairy products, a leading allergen responsible for food allergies worldwide. The sensor, which utilizes a quercetin@zeolitic imidazolate framework-8/polydopamine-coated microfiber interferometer (MFI) cascaded with a tilted fiber Bragg grating (TFBG), boasts a wide detection range of 0.2-100 mg/mL, a low detection limit of 0.04 mg/mL, and high sensitivity of 6.64 dB/(mg/mL) [1.74 nm/(mg/mL)]. The sensor demonstrates high recovery rates in real sample tests, including milk powder, skim milk, and demuttony goat milk.

Key Takeaways:

  • The new sensor is designed for detecting low levels of b-lactoglobulin (B-LG) in dairy products, a leading allergen responsible for food allergies worldwide.
  • The sensor utilizes a quercetin@zeolitic imidazolate framework-8/polydopamine-coated microfiber interferometer (MFI) cascaded with a tilted fiber Bragg grating (TFBG) to achieve high sensitivity and low detection limits.
  • The sensor has a wide detection range of 0.2-100 mg/mL and a low detection limit of 0.04 mg/mL, making it a reliable tool for detecting B-LG in dairy products.
  • The fabrication process allows for low-cost production and moderate manufacturing difficulty, making the sensor a practical tool for food safety monitoring and allergy prevention.
  • The sensor demonstrates high recovery rates (88-104%) in real sample tests, including milk powder, skim milk, and demuttony goat milk.
  • Researchers from Shanxi University have developed the sensor, and the research has been peer-reviewed.
  • Additional authors for this research include Miao Liu, Shuyuan Guo, Yongfeng Zou, Hanlin Liu, Dandan Sun, and Jie Ma.

Statistics:

  • Wide detection range: 0.2-100 mg/mL
  • Low detection limit: 0.04 mg/mL
  • High sensitivity: 6.64 dB/(mg/mL) [1.74 nm/(mg/mL)]
  • High recovery rates in real sample tests: 88-104%
  • Number of authors: 9 (Jingru Mao, Miao Liu, Shuyuan Guo, Yongfeng Zou, Hanlin Liu, Dandan Sun, Jie Ma)

Sources:

  • A reflective cascaded microfiber optic sensor for low-level b-lactoglobulin detection in dairy products: Sensitization by QU@ZIF-8/PDA nanosphere interface. Journal of Hazardous Materials, 2025;496:139244.
  • Elsevier, Radarweg 29, 1043 Nx Amsterdam, Netherlands.