Characterization and classification of pequi trees (Caryocar brasiliense Camb.) based on the profile of volatile constituents using headspace solid-phase microextraction - gas chromatography - mass spectrometry and multivariate analysis

Belo, Renata França Cassimiro; Augusti, Rodinei; Lopes, Paulo Sérgio Nascimento; Junqueira, Roberto Gonçalves

doi:10.1590/s0101-20612013000500018

Cited by 5 publications

(4 citation statements)

References 12 publications

(36 reference statements)

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“…Column heating was programmed starting at 40 o C, remaining for 5 min, heating at 2.5 o C min -1 to 125 o C and then at 10 o C min -1 to 245 o C, at which temperature the isotherm was maintained for 3 min. 13…”

Section: Equipmentmentioning

confidence: 99%

“…Samples were weighed and placed in HS flasks with 20 mL capacity, sealed with an aluminum seal and rubber septum. 13 The HS flasks were subjected to different extraction times (20, 30 and 40 min), different extraction temperatures (25,45 and 65 o C) and different agitations (0, 50 and 100 rpm). These variables were used in order to determine the optimum conditions to reach the partition equilibrium of the analytes between the sample and the fiber in the HS mode, which causes higher recovery of the VOCs after the chromatographic analysis.…”

Section: Extraction Of Vocsmentioning

confidence: 99%

“…After the extraction time, it was inserted in the injector of the chromatograph at 250 o C, for 5 min, for the desorption of the extracted VOCs. 13…”

Section: Extraction Of Vocsmentioning

confidence: 99%

“…19 The S/N ratio values, as well as the peak intensity obtained, were taken from the Xcalibur 1.4 program (Thermo Scientific) and transferred to Microsoft Office Excel 2013, the program in which the peaks were selected, according to the S/N relation. 13…”

Section: Identification Of Vocsmentioning

confidence: 99%

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SPME Fiber Evaluation for Volatile Organic Compounds Extraction from Acerola

García¹,

Rufini²,

Campos³

et al. 2018

J. Braz. Chem. Soc.

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Volatile organic compounds (VOCs) were isolated from acerola fruits (Malpighia emarginata D.C.), by means of different solid phase microextraction (SPME) fibers. For the extraction, the headspace SPME method was used, identifying the VOCs by gas chromatography (GC) with mass spectrometry (MS). The objective of this work was to evaluate the efficiency of SPME fibers and determine the best conditions for extracting VOCs from acerola fruit. The investigated conditions were: extraction time (20, 30 and 40 min), extraction temperature (25, 45 and 65 o C) and agitation (0, 50 and 100 rpm). Of the evaluated fibers, polydimethylsiloxane (PDMS)/divinylbenzene (DVB) extracted the highest number of VOCs, most belonging to terpene, carboxylic acids and hydrocarbons. According to the investigated conditions, most compounds were obtained with an extraction time of 20 min, extraction temperature 65 o C, and no agitation. Compounds cumene, o-xylene, thymol, m-cymene, o-cymene, 2-methyl-1,3-butadiene, anethol, 3-buten-2-one and methyl octadecanoic ester were responsible for the volatile profile of acerola.

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Section: Equipmentmentioning

confidence: 99%

Section: Extraction Of Vocsmentioning

confidence: 99%

“…After the extraction time, it was inserted in the injector of the chromatograph at 250 o C, for 5 min, for the desorption of the extracted VOCs. 13…”

Section: Extraction Of Vocsmentioning

confidence: 99%

Section: Identification Of Vocsmentioning

confidence: 99%

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