技术
gas chromatography (GC): suitable
solid phase microextraction (SPME): suitable
试验参数
sample/matrix: each analyte at 100 ng/L in a 12% ethanol solution
SPME fiber: metal fiber coated with 100 μm PDMS (57928-U)
extraction: headspace, 50 °C for 30 min, with stirring
desorption process: 250 °C for 3 min
column: SLB-5ms, 30 m x 0.25 mm I.D., 0.25 μm (28471-U)
oven: 50 °C (1 min), 25 °C/min to 280 °C
inj. temp.: 250 °C
detector: GC/MS, ECD, 290 °C
carrier gas: helium, 1.5 mL/min, constant
injection: splitless/split, closed 2 min
liner: 0.75 mm I.D. SPME
sample: Wine cork
适用性
application for SPME
应用
food and beverages
分析说明
2,4,6-Trichloroanisole (TCA) is a phenolic compound that, if present, gives wine an unpleasant odor often described as musty, woody, dank, and acrid. Human sensory thresholds for TCA are very low, estimated to be approximately 5 parts per trillion. Natural phenolic compounds in cork can convert into TCA when the cork is exposed to chlorine-containing bleach. TCA contamination can also derive from fungi growing on the grapes during fermentation. In this application, a 100 μm PDMS fiber was used to extract TCA from the headspace above a spiked wine sample prior to analysis by GC. The SLB-5ms GC columns provide consistently low-bleed, inert, efficient, and durable separations.
法律信息
SLB is a registered trademark of Merck KGaA, Darmstadt, Germany
分析物
说明
2,4,6-Trichloroanisole
2,4,6-Trichlorophenol (acylated)
2,3,4,6-Tetrachorophenol (acylated)
Pentachlorophenol (acylated)
SPME 光纤
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