Wydział Chemii

Maria Zdończyk

Bartłomiej Potaniec

Maciej Krzywiecki

Sebastian Arabasz

Joanna Cybińska

2024

Applied Materials Today

39

102268/1-102268/5

10.1016/j.apmt.2024.102268

Naukowa

Angielski

Artykuł

The challenge of developing sensors with rapid and clear colour and luminescence change, quickly informing about food spoilage. This study explores the optical properties of xanthene derivative dye Rhodamine 800 (Rh800), focusing on its response to ammonia concentrations for potential applications in chemical sensing, particularly for detecting food spoilage. Rh800 is known for its low toxicity, high photostability, and emission in the red spectral range. The research involves incorporating Rh800 into sol-gel-derived silica to create a chemical sensor. The luminescent properties of Rh800 are found to change significantly in response to ammonia concentration, with observable alterations in color and luminescence intensity over time. The developed sensor demonstrates effectiveness in detecting ammonia concentrations relevant to meat spoilage, showcasing its potential application in food quality monitoring. LOD (limit of detection), LOQ (limit of quantification) and RSD (relative standard deviation) was calculated using five replicates for every concentration resulting in 11.4 ppm, 35 ppm and 5.26 % respectively. Structural studies through NMR spectroscopy reveal the hydrolysis of Rh800 in an alkaline environment. The findings contribute to the understanding of organic dye behavior, facilitating the design of stable organic dyes and sensors. The proposed colorimetric sensor presents a promising, user-friendly solution for real-time monitoring of food spoilage, emphasizing its significance in ensuring food safety and reducing economic losses.

Silica layers, Food spollage sensor, Rhodamine 800, organic dye

http://dx.doi.org/10.1016/j.apmt.2024.102268

http://www.elsevier.com