scholarly journals Comparison of mentha extracts obtained by different extraction methods

2006 ◽  
pp. 145-154 ◽  
Author(s):  
Slavica Milic ◽  
Zika Lepojevic ◽  
Dusan Adamovic ◽  
Ibrahim Mujic ◽  
Zoran Zekovic
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Fluid ◽  
Steam Distillation ◽  
Methylene Chloride ◽  
Soxhlet Extraction ◽  
Extraction Methods ◽  
Extraction Yield ◽  
Quantitative Composition ◽  
Qualitative And Quantitative ◽  
Steam Distillation Extraction

The different methods of mentha extraction, such as steam distillation, extraction by methylene chloride (Soxhlet extraction) and supercritical fluid extraction (SFE) by carbon dioxide (CO J were investigated. SFE by CO, was performed at pressure of 100 bar and temperature of40?C. The extraction yield, as well as qualitative and quantitative composition of obtained extracts, determined by GC-MS method, were compared.

scholarly journals Essential oil and extract of coriander (Coriandrum sativum L.)

2011 ◽  
pp. 281-288 ◽  
Author(s):  
Zoran Zekovic ◽  
Dusan Adamovic ◽  
Gordana Cetkovic ◽  
Marija Radojkovic ◽  
Senka Vidovic
Keyword(s):  
Essential Oil ◽  
Steam Distillation ◽  
Methylene Chloride ◽  
Soxhlet Extraction ◽  
Coriandrum Sativum ◽  
Geranyl Acetate ◽  
Quantitative Composition ◽  
Dry Extract ◽  
Qualitative And Quantitative

Two different methods of coriander (Coriandrum sativum L.) essential oil isolation, steam distillation and extraction by methylene chloride (Soxhlet extraction) were investigated. After the determination of essential oil content in the investigated drug and in dry extract (using steam distillation), qualitative and quantitative composition of obtained essential oils, determined by TLC and GC-MS methods, were compared. The content of linalool was higher (52.4%) in essential oil obtained by coriander steam distillation than that in essential oil separeted from dry extract (42.8%), and, on the other hand, content of geranyl-acetate was lower (4.6% and 11.7%, respectively).

scholarly journals Influence of pressure and time on extraction process using supercritical CO2

2008 ◽  
Vol 44 (1) ◽  
pp. 125-131 ◽  
Author(s):  
V. Micic ◽  
Z. Lepojevic ◽  
B. Mandic ◽  
M. Jotanovic ◽  
G. Tadic ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Co2 ◽  
Particle Diameter ◽  
Extraction Process ◽  
Salvia Officinalis ◽  
Quantitative Composition ◽  
Qualitative And Quantitative ◽  
Salvia Officinalis L ◽  
Carbon Dioxide Co2

The supercritical fluid extraction (SFE) by carbon dioxide (CO2) of Salvia officinalis L. was investigated. SFE by CO2 was performed at different pressure (80, 100, 150, 200 and 300 bar) and constant temperature of 40?C (all other extraction conditions, such are flow rate, particle diameter of Salvia officinalis, extraction time were kept constant. The GC-MS method was used for determination of qualitative and quantitative composition of obtained extracts and essential oils.

scholarly journals Lipid Extraction fromSpirulinasp. andSchizochytriumsp. Using Supercritical CO2with Methanol

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Shihong Liu ◽  
Husam A. Abu Hajar ◽  
Guy Riefler ◽  
Ben J. Stuart
Keyword(s):  
Organic Solvents ◽  
Methylene Chloride ◽  
Lipid Extraction ◽  
Volume Ratio ◽  
Soxhlet Extraction ◽  
Extraction Process ◽  
Extraction Yield ◽  
Biodiesel Production ◽  
Operating Pressure ◽  
High Lipid

Microalgae are one of the most promising feedstocks for biodiesel production due to their high lipid content and easy farming. However, the extraction of lipids from microalgae is energy intensive and costly and involves the use of toxic organic solvents. Compared with organic solvent extraction, supercritical CO2(SCCO2) has demonstrated advantages through lower toxicity and no solvent-liquid separation. Due to the nonpolar nature of SCCO2, polar organic solvents such as methanol may need to be added as a modifier in order to increase the extraction ability of SCCO2. In this paper, pilot scale lipid extraction using SCCO2was studied on two microalgae species:Spirulinasp. andSchizochytriumsp. For each species, SCCO2extraction was conducted on 200 g of biomass for 6 h. Methanol was added as a cosolvent in the extraction process based on a volume ratio of 4%. The results showed that adding methanol in SCCO2increased the lipid extraction yield significantly for both species. Under an operating pressure of 4000 psi, the lipid extraction yields forSpirulinasp. andSchizochytriumsp. were increased by 80% and 72%, respectively. It was also found that a stepwise addition of methanol was more effective than a one-time addition. In comparison with Soxhlet extraction using methylene chloride/methanol (2:1, v/v), the methanol-SCCO2extraction demonstrated its high effectiveness for lipid extraction. In addition, the methanol-SCCO2system showed a high lipid extraction yield after increasing biomass loading fivefold, indicating good potential for scaling up this method. Finally, a kinetic study of the SCCO2extraction process was conducted, and the results showed that methanol concentration in SCCO2has the strongest influence on the lipid extraction yield.

Research on the Extraction of Dendranthema Morifolium Volatile Oils by Microwave-Assisted Steam Distillation Extraction

2013 ◽  
Vol 634-638 ◽  
pp. 1049-1053
Author(s):  
Hui Lin Cao ◽  
Shuang Ran Liang ◽  
Yang Tian ◽  
Zhi Ling Chen ◽  
Jian Ping Chao
Keyword(s):  
Extraction Method ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Extraction Yield ◽  
Volatile Oils ◽  
Microwave Assisted ◽  
Steam Extraction ◽  
Steam Distillation Extraction ◽  
Optimum Extraction ◽  
Modern Technologies

Microwave-assisted steam extraction system combines the advantages of both conventional and modern technologies. MAE is probably going to be the leading technology in essential oil producing industry. In our research, one-factor and uniform experimental designs are used to determine the optimum extraction conditions, and the results are as follows: the extraction yield is measured as 2.30% with 3h of reflux time, when degree of pulverization is 90, immersing time is 3h, yield of solid to liquid equals 12: 1 ml/g. The chemicals in the production were examined by GC-MS. More than 40 kinds of chemicals were detected, which is consistent with that of the traditional steam extraction method. However, the extraction efficiency is dramatically increased when the steam extraction is assisted with microwave heating, and it is up to 3.8 times.

scholarly journals Effect of Supercritical Fluid Extraction on the Reduction of Toxic Elements in Fish Oil Compared with Other Extraction Methods

2015 ◽  
Vol 78 (1) ◽  
pp. 172-179 ◽  
Author(s):  
PARVANEH HAJEB ◽  
JINAP SELAMAT ◽  
LEILI AFSAH-HEJRI ◽  
NOR AINY MAHYUDIN ◽  
SHAHRAM SHAKIBAZADEH ◽  
...  
Keyword(s):  
Fish Oil ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Toxic Elements ◽  
Soxhlet Extraction ◽  
Extraction Methods ◽  
Human Consumption ◽  
Fluid Extraction ◽  
High Quality ◽  
Low Levels

High-quality fish oil for human consumption requires low levels of toxic elements. The aim of this study was to compare different oil extraction methods to identify the most efficient method for extracting fish oil of high quality with the least contamination. The methods used in this study were Soxhlet extraction, enzymatic extraction, wet reduction, and supercritical fluid extraction. The results showed that toxic elements in fish oil could be reduced using supercritical CO2 at a modest temperature (60°C) and pressure (35 MPa) with little reduction in the oil yield. There were significant reductions in mercury (85 to 100%), cadmium (97 to 100%), and lead (100%) content of the fish oil extracted using the supercritical fluid extraction method. The fish oil extracted using conventional methods contained toxic elements at levels much higher than the accepted limits of 0.1 μg/g.

Determination of Benzoates and Hydroxybenzoates in Foods

1966 ◽  
Vol 49 (4) ◽  
pp. 829-834 ◽  
Author(s):  
Salvatore J Pinella ◽  
Anthony D Falco ◽  
George Schwartzman
Keyword(s):  
Benzoic Acid ◽  
Steam Distillation ◽  
Sorbic Acid ◽  
Collaborative Study ◽  
Qualitative And Quantitative ◽  
Recording Spectrophotometer ◽  
Chromatographic Plate ◽  
Steam Distillation Extraction ◽  
Tlc Separation

Abstract A method has been devised for the qualitative and quantitative determination of benzoates and hydroxybenzoates in foods. The qualitative procedure is based on the TLC separation of benzoic acid, the hydroxybenzoates, and sorbic acid, using kieselguhr G-silica gel GF 254 as the absorbent and hexane:acetic acid as the mobile solvent. The separated preserving acids are identified under UV radiation and by specific chromogenic reagents. Benzoic acid in foods was determined quantitatively by steam distillation, extraction, and TLC separation. The benzoic acid was removed from the chromatographic plate, extracted with ethanol, and determined in the UV region with a recording spectrophotometer and 5 cm micro cells. These procedures should be subjected to collaborative study.

Sign in / Sign up

Export Citation Format

Share Document