کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5133762 | 1492071 | 2017 | 6 صفحه PDF | دانلود رایگان |
- PDA sensors reacted with 2 out of 8 sanitizers/surfactants tested.
- The ratio of sensor to sanitizer was an important factor in detection of reacting sanitizers.
- The PDA sensor was capable of detecting different concentrations of the sanitizers.
- PDA sensors could be used to detect chemical residues on processing surfaces.
Polydiacetylene (PDA) vesicles are of interest as biosensors, particularly for pathogenic bacteria. As part of a food monitoring system, interaction with food sanitizers/surfactants was investigated. PDA vesicles were prepared by inkjet-printing, photopolymerized and characterized by dynamic light scattering (DLS) and UV/Vis spectroscopy. The optical response of PDA vesicles at various concentrations verses a fixed sanitizer/surfactant concentration was determined using a two variable factorial design. Sanitizer/surfactant response at various concentrations over time was also measured. Results indicated that only Vigilquat and TritonX-100 interacted with PDA vesicles giving visible colour change out of 8 sanitizers/surfactants tested. PDA vesicle concentration, sanitizer/surfactant concentration, and time all had a significant (PÂ <Â 0.0001) effect on colour change. As they are highly sensitive to the presence of Vigilquat and TritonX-100, PDA sensors could be used to detect chemical residues as well as for detection of various contaminants in the food industry.
Journal: Food Chemistry - Volume 221, 15 April 2017, Pages 515-520