scholarly journals Study on the Effect of Dual Solvent Proportions on Composition of Rosa x damascena Concrete Oil Obtained using Soxhlet Extraction Method

2021 ◽  
Vol 34 (1) ◽  
pp. 78-84
Author(s):  
K. Sofiya ◽  
G. Bharath Kumar
Keyword(s):  
Mass Spectrometry ◽  
Petroleum Ether ◽  
Extraction Method ◽  
Soxhlet Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Pure Ethanol ◽  
Phenylethyl Alcohol ◽  
Extraction Study ◽  
New Compounds ◽  
Rotary Vacuum

Concrete oil was extracted from Rosa x damascena using different percentage ratios of solvents (petroleum ether and ethanol) by the Soxhlet extraction method. The extraction was carried out using petroleum ether and ethanol in five different percentage ratios of (v/v) (100:0, 75:25, 50:50, 25:75, 0:100) (petroleum ether:ethanol). The rotary vacuum evaporator was used to separate concrete oil and the solvents. The extracted concrete oil was analyzed using gas chromatography-mass spectrometry (GC-MS) technique. The obtained results show that many new compounds were identified, at two different solvents and its ratios. Phenylethyl alcohol in the percentages of (61.71%), (10.07%) and (25.92%) was obtained as a major compound with the solvent percentages of (100:0), (50:50) and (75:25) (PE:E), respectively. Hexacosane (37.2%) was identified as a major compound when pure ethanol is used as a solvent. The highest number of components were identified (totally 93 components) when an equal percentage (50:50) of petroleum ether and ethanol were mixed. The usual monoterpenes components, e.g. geraniol, nerol, citronellol and linalool, were not found in the present extraction study. This study concludes that the compositions of concrete oil were mainly influenced by the type of solvents and its ratios used for the extraction

Analysis of Volatile and Semivolatile Components in Marsdeniae tenocissimae by Gas Chromatography-Mass Spectrometry

2014 ◽  
Vol 1033-1034 ◽  
pp. 337-341
Author(s):  
Ze Feng Wang ◽  
Ling Shi ◽  
Ai Ping Fan ◽  
Chun Xu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Gas Chromatography ◽  
Extraction Method ◽  
Soxhlet Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Aldehydes And Ketones ◽  
Peak Areas

A gas chromatography-mass spectrometry (GC-MS) method was developed for analyses of volatile and semivolatile components in Marsdeniae tenocissimae. The volatile and semivolatile components in stem of Marsdenia tenocissima are extracted by soxhlet extraction method with chloroform. The results show that 46 compositions were identified and accounted for 90.144% of the total peak areas. The major volatile and semivolatile components of stem were: alkanes (12.168%), alcohol (6.732%), aldehydes and ketones (7.272%), fatty acids (46.152%), Esters (13.068%), other (4.752%), respectively. The study provides useful data for further analysis of components of Marsdenia tenocissima.

Physical Characteristics and Organoleptic Test of Essential Oil Extracted from Sedap malam Flower (Polianthes tuberosa) Using N-Hexane Solvent

2021 ◽  
Vol 882 ◽  
pp. 191-199
Author(s):  
Suharno Rusdi ◽  
Farida Imtiyaz ◽  
Nopia Denvil Wulandari ◽  
Achmad Chafidz
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Essential Oil ◽  
Extraction Method ◽  
Soxhlet Extraction ◽  
Extraction Process ◽  
Gas Chromatography Mass Spectrometry ◽  
Infra Red ◽  
Ft Ir ◽  
Ir Analysis

In this work, an essential oil was extracted from from Sedap Malam (Tuberose) flower using n-hexane as the solvent. The extraction process was performed using simple soxhlet extraction method with the ratio between Sedap Malam flower and n-hexane solvent was 1:5. The physical properties, such as density and rendement values of the extracted essential oil were analyzed. The analysis results exhibited that the essential oil has average rendement value of 9.91 % and density value of 0.9275 g/mL. Additionally, organoleptic testing was also carried out to test the response of respondents toward the color and odor/fragrance of the extracted essential oil. The results showed that the responses of the respondents about the color and fragrance of the extracted essential oil were quite satisfactory. The highest responses for both color and the fragrance were belong to “Really Like” category. The extracted essential oil was also characterized using Gas Chromatography - Mass Spectrometry (GC-MS) apparatus and Fourier Transform Infra-Red (FT-IR) analysis.

scholarly journals Analysis of Bread Lipids for 3-MCPD Esters

2009 ◽  
Vol 27 (Special Issue 1) ◽  
pp. S417-S420 ◽  
Author(s):  
M. Doležal ◽  
J. Kertisová ◽  
Z. Zelinková ◽  
J. Velíšek
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Soxhlet Extraction ◽  
Fat Content ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometry Method ◽  
Mass Spectrometry Method ◽  
Rye Flour ◽  
Mcpd Esters

Objective of this work was determination of processing contaminant known as 3-MCPD (3-chloropropane-1,2-diol) in its free and bound form in breads with defined parameters of processing. Selected and analysed were 24 samples, which represented two sets of breads produced in bakeries equipped with a continual line. In all cases determinations were carried out for breadcrumb and crust separately. The first set of samples were wheat-rye breads produced chronologically in ten days in the bakery Michelská pekárna, slightly different in temperatures and times of baking. The second set contained 14 samples of wheat-rye breads with a content of rye flour less than 40% differing in the yeast type and acidity. These breads were produced in the bakery Kontinua. The fat content was determined in all samples by Soxhlet extraction. Free and bound 3-MCPD was determined by gas chromatography–mass spectrometry method. Concentration of free 3-MCPD in samples was at interval < 9–54.5 &mu;g/kg. Concentration of bound 3-MCPD was at interval 1.56–23.60 mg/kg of fat (i.e. 5.7–84.9 &mu;g/kg of sample).

A new furan carboxamide and two potential precursors from a terrestrial streptomycete

2017 ◽  
Vol 72 (3) ◽  
pp. 175-182 ◽  
Author(s):  
Humaira Naureen ◽  
Michel Feussi Tala ◽  
Khaled A. Shaaban ◽  
Mohamed Shaaban ◽  
Anja Schüffler ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Density Functional ◽  
Acid Amide ◽  
Octadecenoic Acid ◽  
Gas Chromatography Mass Spectrometry ◽  
Bioactive Metabolites ◽  
Cytotoxic Activities ◽  
Tetradecanoic Acid ◽  
Vinyl Phenol ◽  
New Compounds

Abstract Three new bioactive metabolites, 1,6-dihydroxy- 2-methyl-heptan-4-one (1), 4-hydroxy-1-(2-methyl-oxiranyl)- pentan-2-one (2), and 2-(2-hydroxy-propyl)-4-methylfuran- 3-carboxylic acid amide (3) were isolated from the terrestrial Streptomyces sp. isolate ANK245, along with the new microbial constituent p-vinylanisol (4a) and the known metabolites p-vinyl-phenol (4b) and phenethyl alcohol. Analysis of the nonpolar part of the extract by gas chromatography/mass spectrometry (GC-MS) provided further evidence for tetradecanoic acid, 9-octadecenoic acid, hexadecanoic acid, 2-methoxy-4-vinylphenol (4c), 4-hydroxy-3-methoxy-benzaldehyde, o-hydroxybiphenyl, and 1,5,9-trimethyl-4,8,13-cyclotetradecatrien-1,3-diol (5). Structures 1–3 of the new compounds were elucidated by nuclear magnetic resonance (NMR) and NMR spectroscopy, but mass spectrometry (MS) techniques and their absolute configuration were determined by density functional theory (DFT) calculations and Mosher derivatisation. Their antimicrobial and cytotoxic activities were evaluated in comparison with the crude bacterial extract.

scholarly journals Analyses of Chlorothalonil and Dichlofluanid in Greenhouse Air

1997 ◽  
Vol 80 (5) ◽  
pp. 1091-1097 ◽  
Author(s):  
Fj. Egea González ◽  
M L Castro Cano ◽  
J L Martínez Vidal ◽  
M Martínez Galera
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Field Experiment ◽  
Polyurethane Foam ◽  
Sorption Capacity ◽  
Soxhlet Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Electron Capture Detection ◽  
Solid Sorbents ◽  
And Storage

Abstract A method to sample and analyze chlorothalonil and dichlofluanid in greenhouse air was evaluated. Analysis was performed by gas chromatography with electron capture detection and gas chromatography- mass spectrometry. Solid sorbents such as Chromosorb 102, Porapak R, Supelpak-2, AmberliteXAD-2, Amberlite XAD-4, and polyurethane foam were studied. The use of Soxhlet extraction and solvent desorption with sonication to desorb the pesticides from these sorbents were compared.A procedure to generate atmospheres containing known concentrations of these fungicides was established to study sorption capacity and samplingconditions. Breakthrough and storage of pesticides also were studied. Dissipation of analytes in a 24 h period after application was studied by using personal samplers in a field experiment.

scholarly journals Poor specificity and recovery of urinary free cortisol as determined by the Bayer ADVIA Centaur extraction method

2003 ◽  
Vol 40 (5) ◽  
pp. 563-565 ◽  
Author(s):  
G Gray ◽  
L Shakerdi ◽  
AM Wallace
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solvent Extraction ◽  
Extraction Method ◽  
Urinary Free Cortisol ◽  
Cross Reactivity ◽  
Gas Chromatography Mass Spectrometry ◽  
Sample Matrix ◽  
Free Cortisol ◽  
Free Serum

Background: Immunoassay methods for urinary free cortisol (UFC) lack specificity, and many procedures have not been fully evaluated for routine use. In the current study we evaluated the Bayer ADVIA Centaur extraction UFC immunoassay and compared results to those obtained by a specific gas chromatography-mass spectrometry (GC-MS) method. Results: The Bayer ADVIA Centaur cortisol assay lacked specificity. Cortisone, a steroid present in urine at concentrations similar to those of cortisol, demonstrated a cross-reactivity of 44%. In addition, the choice of matrix used to resuspend steroids after solvent extraction from urine affected recovery. Recovery was improved if the recommended urine reconstruction buffer was replaced by steroid-free serum. Conclusion: Irrespective of the sample matrix used, the Centaur method overestimates UFC, giving results up to twice those obtained by a specific GC-MS method.

Sign in / Sign up

Export Citation Format

Share Document