Qualitative Analysis of Cinnamomum burmannii Content using GCMS (Gas Chromatography Mass Spectometry) Method

The coasts of Cuba are exposed to damage caused by the contamination by petroleum hydrocarbons. The coastal strip of the Gulf of Santiago de Cuba is an example of natural resources deterioration due to this contamination, which appears as one of its main environmental problems. In the present work, using gas chromatography, quantitative and qualitative analysis were performed based on the retention time values and the area under the chromatogram curve, which allowed characterizing the degree of contamination at four points of the bay of Santiago de Cuba: playa La Estrella (P1), “Guillermón Moncada” Port (P2) “Hermanos Díaz” Oil Refinery (P3), “Antonio Maceo” Thermoelectric Power Plant RENTE (P4). Retention times of individual peaks in chromatograms of individual samples with several standards, thus obtaining the types of hydrocarbons present at each point, with points P2 and P3 being the ones with the highest pollutant and the highest concentration by peak height. Fuel oil turned out to be the most polluting agent present in the bay.

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Esterification of Glycerol with Acetic Acid in Bioadditive Triacetin with Fe2O3/Activated Carbon Catalyst

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.849.125 ◽

2020 ◽

Vol 849 ◽

pp. 125-129

Author(s):

Zahrul Mufrodi ◽

Shinta Amelia

Keyword(s):

Gas Chromatography ◽

Acetic Acid ◽

Reaction Time ◽

Catalyst Concentration ◽

Raw Materials ◽

Volume Ratio ◽

Raw Material ◽

Biodiesel Production ◽

Carbon Catalyst ◽

Mass Spectometry

Esterification and transesterification processes for biodiesel production generate glycerol which is possible to be converted into triacetin. It is an actractive bioadditive for increasing octane number of fuel. The production of this bioadditive in a biodiesel plant also increases the revenue as raw material comes from biodiesel process production as by-product.This study examines the effects of catalyst concentration and temperature on triacetin production using glycerol from esterification process and acetic acid at volume ratio of 1:3 as raw materials. An activated charcoal as catalyst is activated with sulfuric acid at concentration of 2% and 3% (w/w). The esterification temperatures are varied at 90 and 100°C and the reaction time is set for 3 hours. The samples are taken frequently at certain interval times of 15, 30, and 60 minutes for chemical analysis using Gas Chromatography Mass Spectometry. It is observed that using 2% and 3% (w/w) of catalysts at 90°C and 60 minutes reaction time converts 41.037% and 57.441% of glycerol respectively.

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In-Depth Qualitative Analysis of Lime Essential Oils Using the Off-Line Combination of Normal Phase High Performance Liquid Chromatography and Comprehensive Two-Dimensional Gas Chromatography-Quadrupole Mass Spectrometry

Foods ◽

10.3390/foods8110580 ◽

2019 ◽

Vol 8 (11) ◽

pp. 580 ◽

Cited By ~ 1

Author(s):

Mariosimone Zoccali ◽

Barbara Giocastro ◽

Ivana L. Bonaccorsi ◽

Alessandra Trozzi ◽

Peter Q. Tranchida ◽

...

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

Essential Oil ◽

Qualitative Analysis ◽

High Performance ◽

Normal Phase ◽

Two Dimensional ◽

Quadrupole Mass

The present research is focused on the in-depth qualitative analysis of three types of lime essential oil (EO), viz., Key (A and B) and Persian, using the off-line combination of normal phase high performance liquid chromatography (NP-HPLC) and comprehensive two-dimensional gas chromatography–quadrupole mass spectrometry (GC × GC-QMS). The first analytical dimension (NP-HPLC) was exploited for the isolation of the hydrocarbon constituents from the oxygenated ones. Each fraction was then reduced in volume and analyzed using (cryogenic modulation) GC × GC-QMS. Peak assignment was carried out through the combined use of mass spectral database and linear retention index matching processes. The powerful four-dimensional technology enabled the separation and identification of a very high number (153) of lime essential oil volatile compounds.

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