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G000075

GC Analysis of Fresh and Rancid Potato Chips on SPB®-1 SULFUR after SPME using 50/30 μm DVB/Carboxen/PDMS Fiber

suitable for GC, application for SPME

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About This Item

metody

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

parametry testowe

sample/matrix: 3 g crushed potato chips in 15 mL vial
SPME fiber: DVB/Carboxen/PDMS, 50/30 μm, StableFlex (57328-U)
extraction: headspace, 65 °C, 20 min, with stirring
desorption process: 3 min, 250 °C
column: SPB-1 SULFUR, 30 m × 0.32 mm I.D., 4.0 μm (24158)
inj. temp.: 250 °C
oven: 45 °C (1.5 min) to 250 °C at 12 °C/min, hold 10 min
detector: quadrupole mass spectrometer, m/z = 35-290 at 0.6 sec/scan
carrier gas: helium, 40 cm/sec
injection: Splitless/split, closed 2 min
liner: 0.75 mm liner
sample: 3g crushed potato chips in 15 mL vial

przydatność

application for SPME

Zastosowanie

food and beverages

Komentarz do analizy

Potato chips can contain up to 50% oil and are subject to rancidity. Aldehydes, particularly hexanal and heptanal, are formed from fatty acids that are cleaved at the double bonds when exposed to ultraviolet light and air. A package of 3-year-old potato chips was analyzed using SPME and compared to a fresh package. The presence of aldehydes indicated that the older chips were rancid. However, due to the age of the chips, further oxidation of the aldehydes occurred that resulted in the formation of hexanoic and heptanoic acids. A Carboxen/PDMS/DVB fiber was inserted into the headspace of the potato chip samples at 65 °C for 20 minutes with agitation. The fiber was then analyzed using GC/MS on a SPB-1 SULFUR column. This non-polar column has a thick film and is ideal for smaller molecules.

Informacje prawne

SPB is a registered trademark of Merck KGaA, Darmstadt, Germany
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Analit

Opis
    Nonanal
    Octane
    Butyl hexanoate
    Octanoic acid
    Heptanoic acid
    Hexanal
    Methyl butyrate
    Heptanal, ≥95%, FCC, FG
    Octanal
    Decanal
    Acetic acid
    Hexanoic acid
    Zobacz wszystko (12)

Włókno SPME

Numer produktu
Opis
Cennik

kolumna analityczna

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Opis
Cennik

produkt powiązany

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Opis
Cennik

standardowe

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Opis
Cennik

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