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Poster Presentations
Day 2, June 23（Mon.）
Room P (Maesato East, Foyer, Ocean Wing)
- 2P-AM-43
Development of a Solid-Phase Microextraction Combined with GC-MS Platform for The Differentiation of Frozen Concentrated Milk and Fresh Milk.
(1NCHU/Food Safety, 2NCHU/Molecular Biology)
oYa-Ting Zhuang1, Chien-Chen Lai1,2
Milk is an essential part of the daily diet, providing protein, calcium, and vitamins1. Common dairy products include fresh milk (FM), long-life milk (LLM), and frozen concentrated milk (FCM). Among them, FCM undergoes dehydration, reducing transportation costs and extending shelf life. Since FCM is a more cost-effective alternative, the price differences may lead to adulteration or mislabeling. Therefore, this study employs headspace solid-phase microextraction (HS-SPME) combined with gas chromatography-mass spectrometry (GC-MS)2 to analyze volatile organic compounds (VOCs) in dairy products and identify key VOCs that distinguish FM from FCM. The extraction efficiency of HS-SPME is influenced by several factors, including SPME fiber type, equilibrium and adsorption temperatures, equilibrium time, adsorption time, and salt addition. Optimization tests of FM samples indicated that divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) 50/30 μm was the most suitable fiber; adsorption and equilibrium temperatures were determined to be 50°C; salt addition didn't significantly increase the VOCs. Further studies will focus on optimizing SPME adsorption time, equilibrium time, and GC-MS parameters while analyzing FCM samples. In brief, this study aims to establish a rapid, accurate, solvent-free method for dairy product identification, which can be applied in market monitoring, consumer protection, and improving quality control and credibility in the dairy industry.