Optimisation of a simple and reliable method based on headspace solid-phase microextraction for the determination of volatile phenols in beer

Pizarro, Consuelo; Pérez-del-Notario, N.; González-Sáiz, J.M.

doi:10.1016/j.chroma.2010.07.021

Cited by 45 publications

(37 citation statements)

References 35 publications

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“…In the last two decades SPME has been applied to extract and concentrate beer components, nevertheless, for each SPME experimental parameter, a wide range of conditions have been used [ 4,5,[16][17][18][19][20][21][22][23][24][25][26][35][36][37][38][39][40]. However, for a beer researcher or analyst is not easy to select SPME procedure based on the current literature [4,5,[16][17][18][19][20][21][22][23][24][25][26].…”

Section: Optimization Of Spme Conditions For Beer Volatile Profilingmentioning

confidence: 99%

Insights on beer volatile profile: Optimization of solid-phase microextraction procedure taking advantage of the comprehensive two-dimensional gas chromatography structured separation

Martins

Brandão²,

Almeida

et al. 2015

J. Sep. Science

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The aroma profile of beer is crucial for its quality and consumer acceptance, which is modu-lated by a network of variables. The main goal of this study was to optimize solid-phase microextraction experimental parameters (fiber coating, extraction temperature, and time), taking advantage of the comprehensive two-dimensional gas chromatography structured separation. As far as we know, it is the first time that this approach was used to the untargeted and comprehensive study of the beer volatile profile. Decarbonation is a critical sample preparation step, and two conditions were tested: static and under ultrasonic treatment, and the static condition was selected. Considering the conditions that promoted the highest extraction efficiency, the following parameters were selected: poly(dimethylsiloxane)/divinylbenzene fiber coating, at 40ºC, using 10 min of pre-equilibrium followed by 30 min of extraction. Around 700-800 compounds per sample were detected, corresponding to the beer volatile profile. An exploratory application was performed with commercial beers, using a set of 32 compounds with reported impact on beer aroma, in which different patterns can be observed through the structured chromatogram. In summary, the obtained results emphasize the potential of this methodology to allow an in-depth study of volatile molecular composition of beer.

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Section: Optimization Of Spme Conditions For Beer Volatile Profilingmentioning

confidence: 99%

Insights on beer volatile profile: Optimization of solid-phase microextraction procedure taking advantage of the comprehensive two-dimensional gas chromatography structured separation

Martins

Brandão²,

Almeida

et al. 2015

J. Sep. Science

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“…Currently, there are only a few analytical methods of volatile siloxanes in aqueous samples, including gas stripping process (Huppmann et al, 1996), purge and trap GCeMS procedure (Kaj et al, 2005), and headspace gas chromatography with mass spectrometry (Sparham et al, 2008). Solid-phase microextraction (SPME) is a simple, economical, solventfree, and reliable method for the simultaneous determination of volatile organic compounds from aqueous samples (Stiles et al, 2008;Pazarro et al, 2010;Negreira et al, 2010;Dong et al, 2005). In this paper, SPME coupled with GCeMS is used to determine four cyclic and two linear volatile siloxanes in aqueous and sludge samples from a WWTP.…”

Section: Introductionmentioning

confidence: 99%

Occurrence and fate of volatile siloxanes in a municipal Wastewater Treatment Plant of Beijing, China

2013

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a b s t r a c tThe occurrence and fate of four cyclic and two linear volatile siloxanes were studied in a municipal Wastewater Treatment Plant (WWTP), Beijing City, China. Aqueous and sludge samples were analyzed by solid-phase microextraction (SPME) coupled with gas chromatographyemass spectrometry (GCeMS). In the studied WWTP, four cyclic analogs (D3eD6) had significantly higher concentrations and frequencies than the two linear analogs Besides adsorption, they were eliminated mainly in anaerobic units (44.4e84.3%). Through in vitro biodegradation experiments, we concluded that in the anaerobic compartments, Hexamethylcyclotrisiloxane (D3) and Dodecamethylcyclohexasiloxane (D6) were eliminated mostly by volatilization, while Octamethylcyclotetrasiloxane (D4) and Decamethylcyclopentasiloxane (D5) may be eliminated by both volatilization and degradation.Furthermore, microbe catalysis hydrolysis was identified as one of the main degradation pathways for D4 and D5 in anaerobic compartments. ª

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“…Headspace solid phase microextraction (HS-SPME) was used to extract the volatile compounds 20 . The above-mentioned techniques have already been successfully applied in analytical studies directed at the analysis of volatile compounds from different food samples such as vegetable oils 8 , alcoholic beverages 21,25,27,29 , meat products 28 , vinegars 4 or fish 10 . However, the methodology has not been appropriately developed to date for products such as raw spirits.…”

Section: Introductionmentioning

confidence: 99%

Identification of Volatile Compounds in Raw Spirits of Different Organoleptic Quality

Plutowska

Biernacka

Wardencki

2010

Journal of the Institute of Brewing

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The main purpose of the research was to determine the composition of the volatile fraction of raw spirits, as well as isolation of the aroma profiles for spirits differing in their sensory properties. Profiles were created using a headspace solid-phase microextraction (HS-SPME) and capillary gas chromatography-mass spectrometry technique (GC-MS). The results indicated the presence of over 200 compounds, of which significant numbers were identified. The most significant groups included esters, higher alcohols, aldehydes, acetals, as well as furans, sulphur compounds, terpenoids and benzene derivatives. Among the abovementioned compounds, over 50 were identified whose presence or high content could decrease the quality of the distillates. In particular, this pertains to higher quantities of compounds such as acetals and certain esters, as well as the two compounds, dimethyl trisulphide and geosmin. Aside from the dependence between volatile composition and the sensory quality, differences between distillates originating from different distilleries were observed.

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Optimisation of a simple and reliable method based on headspace solid-phase microextraction for the determination of volatile phenols in beer

Cited by 45 publications

References 35 publications

Insights on beer volatile profile: Optimization of solid-phase microextraction procedure taking advantage of the comprehensive two-dimensional gas chromatography structured separation

Insights on beer volatile profile: Optimization of solid-phase microextraction procedure taking advantage of the comprehensive two-dimensional gas chromatography structured separation

Occurrence and fate of volatile siloxanes in a municipal Wastewater Treatment Plant of Beijing, China

Identification of Volatile Compounds in Raw Spirits of Different Organoleptic Quality

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