技术
gas chromatography (GC): suitable
solid phase microextraction (SPME): suitable
试验参数
sample/matrix: 5 g peanut butter in 40 mL vial
SPME fiber: divinylbenzene-Carboxen-polydimethylbenzene StableFlex (57328-U)
extraction: headspace, 30 min at 65 °C in heating block
desorption process: 270 °C for 5 min
column: SUPELCOWAX 10, 30 m × 0.25 mm, 0.25 μm (24079)
oven: 40 °C (5 min) to 230 °C at 4 °C/min
inj. temp.: 270 °C
injection: splitless/split, closed 0.5 min, 270 °C, with 0.75 mm liner
detector: ion trap mass spectrometer, m/z =30-350 at 0.6 sec/scan. Selected ions used for quantitation.
carrier gas: Helium, 30 cm/sec
liner: 0.75 mm
sample: peanut butter
适用性
application for SPME
应用
agriculture
food and beverages
分析说明
In this application, SPME was used for the analysis of volatiles in multifloral honey using a headspace method. Headspace SPME (HS-SPME) using a Carboxen/PDMS/DVB fiber coupled with gas chromatography-mass spectrometry (GC/MS) was used for the characterization of the volatile fraction of honey samples. Using SPME it was possible to obtain and distinguish the chemical fingerprints of different types of honey. The relatively polar SUPELCOWAX 10 GC column provides excellent separation of these polar compounds.
法律信息
分析物
说明
2-Ethyl-3-methylpyrazine
1-Methylpyrrole
2,3-Dimethylpyrazine
2,5-Dimethylpyrazine
2-Ethylpyrazine, ≥98%, FG
2,3-Diethylpyrazine
2-Methylpyrazine
Carbon disulfide
Dimethyl disulfide
2,6-Dimethylpyrazine
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SPME 光纤
标准
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