2007
DOI: 10.1590/s0102-695x2007000200022
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Aplicação de técnicas cromatográficas e espectrométricas como ferramentas de auxílio na identificação de componentes de óleos voláteis

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Cited by 12 publications
(11 citation statements)
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“…Essential oils with the highest and the lowest toxicity, according to LC 50 , were selected and analyzed by gas chromatography coupled to mass spectrometry (GC-MS) on the Agilent 5975C Series GC/MS (Agilent Technologies Inc., Palo Alto, CA, USA), which incorporates a quadrupole system and is equipped with a nonpolar DB-5 column with 60 m x 0.25-mm inner diameter and 0.25-μm film thickness (Agilent J&W GC Columns, Agilent Technologies Inc., Palo Alto, CA, USA) (Brochini & Lago, 2007). A 1-mL solution of known concentration, containing its corresponding essential oil diluted in hexane, was injected at a split ratio of 1:20.…”
Section: Methodsmentioning
confidence: 99%
“…Essential oils with the highest and the lowest toxicity, according to LC 50 , were selected and analyzed by gas chromatography coupled to mass spectrometry (GC-MS) on the Agilent 5975C Series GC/MS (Agilent Technologies Inc., Palo Alto, CA, USA), which incorporates a quadrupole system and is equipped with a nonpolar DB-5 column with 60 m x 0.25-mm inner diameter and 0.25-μm film thickness (Agilent J&W GC Columns, Agilent Technologies Inc., Palo Alto, CA, USA) (Brochini & Lago, 2007). A 1-mL solution of known concentration, containing its corresponding essential oil diluted in hexane, was injected at a split ratio of 1:20.…”
Section: Methodsmentioning
confidence: 99%
“…Part of the crude oil from collection of January 2004 (approximately 150 mg) was submitted to column chromatography over silica gel soaked with AgNO 3 (15%) (50 g, 55 x 2 cm) eluted with pentane (100 mL), CH2Cl2 (150 mL) and mixtures of CH 2 Cl 2 :Me 2 CO 9:1 (100 mL) and 8:2 (50 mL), to afford fifty four fractions, which were analyzed by GC/FID and pooled together in eleven groups (A-1 to A-11) (Brochini et al, 1999;Brochini & Lago, 2007). This analysis indicated that some groups were composed by one major derivative and had their NMR spectra recorded.…”
Section: Volatile Oil Fractionationmentioning
confidence: 99%
“…A ocorrência dos dois isômeros pode ser comprovada através da análise do espectro de RMN de 13 C do óleo essencial bruto (Brochini et al, 1999;Brochini & Lago, 2007), o qual mostrou, dentre outros, sinais relativos a dois carbonos carbonílicos em δ 190,9 e em δ 191,4, os quais puderam ser atribuídos aos carbonos C-1 do neral e do geranial, respectivamente. Além destes, outros sinais foram detectados entre δ 164,0-122,4, relativos aos carbonos sp 2 C-2/C-3 e C-6/C-7 da mistura isomérica.…”
Section: Resultsunclassified
“…Os espectros de RMN foram registrados em um espectrômetro Bruker, modelo DPX-300, operando a 75 MHz para o núcleo do carbono-13, sendo utilizado clorofórmio-d (Aldrich) como solvente e o pico residual do derivado não deuterado empregado como padrão interno (Brochini & Lago, 2007).…”
Section: Análise Por Ressonância Magnética Nuclear (Rmn)unclassified