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G003784

GC Analysis of Volatiles in Roasted Coffee Beans on Omegawax after SPME using a 50/30 μm DVB/Carboxen/PDMS Fiber

application for SPME, suitable for GC

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About This Item

기술

gas chromatography (GC): suitable
solid phase microextraction (SPME): suitable

검사 파라미터

sample/matrix: 2 g of coffee beans
SPME fiber: 50/30 μm divinylbenzene/Carboxen on polydimethylsiloxane on a StableFlex fiber (57329-U)
extraction: headspace, with a pre-equilibration period of 10 min. at 60 °C, and then a fiber exposure of 40 min. at 60 °C, agitated in an alternate clockwise-anticlockwise rotation mode at 500 rpm
desorption process: 260 °C for 5 min
column: Omegawax 250, 30 m x 0.25 mm I.D., 0.25 μm (24136)
oven: 40 °C (5 min), 4 °C/min to 230 °C, 50 °C/min to 280 °C (2 min)
inj. temp.: 260 °C
detector: MS, m/z 40-400
carrier gas: helium, 34.8 cm/sec constant
injection: splitless
scan range: m/z 40-400
sample: Roasted coffee
liner: 0.75 mm I.D. SPME/Splitless (2633901)

적합성

application for SPME

응용 분야

food and beverages

분석 메모

Headspace-SPME followed by GC analysis was used in this application to analyze volatile compounds in roasted coffee. SPME is ideal for analyzing the headspace of solid samples like coffee beans. The Carboxen/DVB/PDMS fiber is the fiber of choice for analyzing the wide range of analytes commonly found in roast coffee beans.The relatively polar Omegawax 250 GC column provided high resolution.

법적 정보

분석물

설명

    Methyl acetate
    2-Methylfuran
    Ethyl acetate
    2-Butanone
    2,3-Dihydro-5-methylfuran
    Ethyl alcohol
    2,5-Dimethylfuran
    2,3-Butanedione
    3-Hexanone
    2,3-Pentanedione
    Hexanal
    3-Penten-2-one
    2,3-Hexanedione
    1-Methylpyrrole
    3,4-Hexanedione
    α-Terpinene
    Pyridine
    (R)-(+)-Limonene, purum, ≥98.0% (sum of enantiomers, GC)
    Pyrazine
    γ-Terpinene
    2-Methylpyrazine
    p-Cymene
    2,5-Dimethylpyrrole
    Acetoin, primarily dimer, ≥95%, FG
    2,5-Dimethylpyrazine
    2,6-Dimethylpyrazine
    2-Ethylpyrazine, ≥98%, FG
    2,3-Dimethylpyrazine
    4-Heptanone
    3-Ethylpyridine
    2,3,5-Trimethylpyrazine
    Furfural
    Pyrrole
    Furfuryl acetate
    Linalool
    Linalyl acetate
    5-Methylfurfural
    γ-Butyrolactone
    2-Acetyl-1-methylpyrrole
    Furfuryl alcohol
    2-Acetylpyrrole
    Pyrrole-2-carboxaldehyde
    모두 보기 (42)

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