Solid-Phase Microextraction for the Analysis of Some Alcohols and Esters in Beer:  Comparison with Static Headspace Method

Jeleń, Henryk H.; Wlazły, Krystian; Wąsowicz, E.; Kamiński, E.

doi:10.1021/jf9707290

Cited by 131 publications

(96 citation statements)

References 14 publications

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“…The use of longer exposure time is more important for SPME adsorption of volatiles with higher boiling points. Other groups of researchers came to similar results (Jelen et al 1998;Pinho et al 2006).…”

Section: -B U T a N O L 3 -M E T H Y L - A C E T A T E D O D E C Asupporting

confidence: 53%

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Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spektrometry

Kleinova¹,

Klejdus²

2014

Czech J. Food Sci.

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Kleinová J., Klejdus B. (2014): Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spectrometry. Czech J: Food Sci., 32: 241-248.Headspace solid phase microextraction and purge and trap analysis were used for the determination of volatiles in beer. These methods were compared with the analysis of unconcentrated gas phase and liquid extraction. Solid phase microextraction proved to be the most useful and was investigated more closely. Volatiles were isolated by the means of different combinations of sorbents, sorption was performed at various temperatures and times. The addition of salt to the sample and stirring of the sample were examined to enhance the analyte concentration in the gas phase. Ultrasonic bath and filtration were tested to remove carbon dioxide. Not all methods improved the sorption of volatiles. Stirring was characterised by low repeatability and ultrasonic bath causes to the loss of volatile analytes. Distribution constants of volatiles depend on their boiling points and thus different sorption temperatures are suitable for different substances.

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Section: -B U T a N O L 3 -M E T H Y L - A C E T A T E D O D E C Asupporting

confidence: 53%

“…At first the effect of ionic strength increase on the extraction efficiency of SPME was evaluated. According to Jelen (1998) peak areas of all analysed compounds increased with increasing Figure 3. The effect of ionic strength increase on the extraction efficiency of solid phase microextraction (SPME).…”

Section: Comparison Of Sample Preparation Methodsmentioning

confidence: 90%

Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spektrometry

Kleinova¹,

Klejdus²

2014

Czech J. Food Sci.

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“…The first solid phase microextraction sampling technique was introduced by Zhang and Pawliszyn 20 , as an extension of SPME, which had been developed by Arthur and Pawliszyn 1 . SPME has been used for analysis of a wide range of aromatic compounds in wines and other alcoholic beverages 5,17,20 . An advantage of SPME over the conventional solvent extraction methods is that the extracts do not have to be concentrated prior to analysis, preventing loss of low boiling point volatiles 14 .…”

Section: Introductionmentioning

confidence: 99%

Determination of Ethyl Carbamate in Sake Using Headspace Solid Phase Microextraction

Horii

Goto

2010

Journal of the Institute of Brewing

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An analytical method for the determination of ethyl carbamate in alcoholic beverages has been developed and optimized. A combination of headspace solid phase microextraction (HS-SPME), as the extraction technique, and GC/MS, as the determination technique, was utilized. Analytical grade ethyl carbamate dissolved in ethanol solution was analyzed to determine the optimum analytical conditions. Ethyl carbamate-d 5 was added as an internal standard. The following HS-SPME conditions were investigated: type of stationary phase of the fibre, ethanol content, sample volume and extraction time. The optimized procedure showed that the detection limit, relative standard deviation, and recovery were 6.7 μg/L, 0.4-2.0%, and 103.6-107.6%, respectively. The precision of this new method was equivalent to previous analyses. Finally, the developed method was applied to the analysis of ethyl carbamate in sake.

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“…From reported methods 10 Esters were quantified using a high resolution gas chromatograph (HRGC 5300; Carlo Erba Instruments), using flame ionisation detection with a temperature gradient as follows: 35°C for 3 min, raised at 5°C/min to 100°C followed by 20°C/min to 150°C, then 10°C/min to 240°C and finally at 240°C for 7 min. Injection port temperatures were 240°C, helium carrier gas at 10 psi at 2.2 mL /min.…”

Section: Spme Headspace Gc Analysesmentioning

confidence: 99%

Relationships of Overall Estery Aroma Character in Lagers with Volatile Headspace Congener Concentrations

Techakriengkrai¹,

Paterson²,

Taidi³

et al. 2006

Journal of the Institute of Brewing

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In lager beers the intensity of "estery" aroma character is regarded as an important component of sensory quality, but its origins are somewhat uncertain. Overall "estery" aroma intensity was predicted from capillary gas chromatographic (GC) data following solid phase micro extraction (SPME) of headspaces. Estery character was scored in 23 commercial lagers using rankrating, allowing assessors (13) constant access to a range of appropriate standards. From univariate data analysis, all assessors behaved similarly and lagers fell into three significantly different groups: low (1), high (1) and intermediate (21). The quantification of 36 flavour volatiles by SPME of headspaces was reproducible and principal component analysis explained 91% total variance. Multiple linear regression could utilise only a restricted (26) set of flavour volatiles, whereas partial least square regression, that considered all flavour components, showed significant differences and improved prediction. However, an artificial neural network that could compensate for nonlinearities and interactions in ester perception gave the most robust prediction at R 2 = 0.88.

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Solid-Phase Microextraction for the Analysis of Some Alcohols and Esters in Beer: Comparison with Static Headspace Method

Cited by 131 publications

References 14 publications

Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spektrometry

Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spektrometry

Determination of Ethyl Carbamate in Sake Using Headspace Solid Phase Microextraction

Relationships of Overall Estery Aroma Character in Lagers with Volatile Headspace Congener Concentrations

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