Comparison of microwave-assisted extraction and Soxhlet extraction for phenols in soil samples using experimental designs

The Analyst ◽  
1998 ◽  
Vol 123 (8) ◽  
pp. 1679-1684 ◽  
Author(s):  
A. Egizabal ◽  
O. Zuloaga ◽  
N. Etxebarria ◽  
L. A. Fernández ◽  
J. M. Madariaga
Keyword(s):  
Soxhlet Extraction ◽  
Soil Samples ◽  
Experimental Designs ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

Sorption of cesium in young till soils

2014 ◽  
Vol 102 (7) ◽  
Author(s):  
Merja Lusa ◽  
Janne Lempinen ◽  
Hanna Ahola ◽  
Mervi Söderlund ◽  
Anne-Maj Lahdenperä ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Forest Soil ◽  
Ammonium Acetate ◽  
Soil Samples ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

AbstractSoil samples from three forest soil pits were examined down to a depth of approximately three metres using 1 M ammonium acetate extraction and microwave-assisted extraction with concentrated nitric acid (HNO

scholarly journals Evaluation of Microwave-Assisted Extraction for the Analysis of Polychlorinated Biphenyls and Organochlorine Pesticides in Fish

2008 ◽  
Vol 91 (5) ◽  
pp. 1124-1129 ◽  
Author(s):  
Takamitsu Otake ◽  
Yoshie Aoyagi ◽  
Masahiko Numata ◽  
Takashi Yarita
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Soxhlet Extraction ◽  
Liquid Extraction ◽  
Isotope Dilution Method ◽  
Dilution Method ◽  
Microwave Assisted Extraction ◽  
Extraction Techniques ◽  
Microwave Assisted ◽  
Assisted Extraction

Abstract The efficiency of microwave-assisted extraction (MAE) was evaluated for the analysis of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in fish. An isotope dilution method was used for quantification via analysis of the samples by gas chromatography and mass spectrometry. MAE solvent, temperature, and time were optimized, and observed concentrations were compared. The MAE results were also compared to those of other extraction techniques (Soxhlet extraction, pressurized liquid extraction, saponification, and homogenization). Concentrations of PCBs and OCPs obtained by MAE at 120C for 10 min were comparable to those by the other techniques. The results suggest that MAE can be used for the analysis of PCBs and OCPs in fish.

scholarly journals Microwave-Assisted Extraction as an Alternative to Soxhlet, Sonication, and Supercritical Fluid Extraction

1996 ◽  
Vol 79 (1) ◽  
pp. 142-156 ◽  
Author(s):  
Viorica Lopez-A Vila ◽  
Richard Young ◽  
Nataly Teplitsky
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Soxhlet Extraction ◽  
Standard Reference Materials ◽  
Microwave Assisted Extraction ◽  
Fluid Extraction ◽  
Microwave Assisted ◽  
Spiked Soil ◽  
Assisted Extraction ◽  
Relative Standard

Abstract Microwave-assisted extraction (MAE), Soxhlet, soni cation, and supercritical fluid extraction (SFE) were compared in their ability to extract 95 compounds listed in U.S. Environmental Protection Agency Method 8250. Freshly spiked soil samples and 2 standard reference materials were extracted with hexane-acetone (1 + 1) by MAE and Soxhlet extraction, with methylene chloride-acetone (1 + 1) by sonication extraction, and with supercritical carbondioxide modified with 10% methanol by SFE. Results indicate that MAE is a promising extraction technique. Of 94 compounds for which we are reporting data, 51 compounds gave MAE recoveries of >80%; 33,50-79%; 8,20-49%; and 2, <19%. Soxhlet extraction gave very similar results: 50 recoveries were >80%; 32,50-79%; 8,20-49%; and 4, <19%. Sonica tion recoveries were slightly higher: 63 values were >80%; 25,50-79%; 4,20-49%; and 2, <19%. SFE recoveries were the lowest: 37 values were >80%; 37, 50-79%; 12,20-49%, and 8, <19%. MAE gave the best precision: relative standard deviations (RSDs) were <10% for 90 of 94 compounds. Soxhlet extraction gave the worst precision: only 52 of 94 samples gave RSDs ≤10%. Although MAE looks promising, 15 polar basic compounds extracted at 115°C with hexane acetone for 10 min (1000 W power) gave poor recoveries. Because no technique gave acceptable recoveries for these polar compounds, we investigated their extraction with MAE using acetonitrile at 50° and 115°C. Ten of the 15 compounds were quantitatively recovered (>70%) with acetonitrile at 115°C.

Microwave-assisted extraction versus Soxhlet extraction to determine triterpene acids in olive skins

2017 ◽  
Vol 40 (5) ◽  
pp. 1209-1217 ◽  
Author(s):  
Ignacio Fernandez-Pastor ◽  
Antonia Fernandez-Hernandez ◽  
Sergio Perez-Criado ◽  
Francisco Rivas ◽  
Antonio Martinez ◽  
...  
Keyword(s):  
Soxhlet Extraction ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Triterpene Acids ◽  
Assisted Extraction
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