Second-order calibration for the determination of fatty acids in pomegranate seeds by vortex-assisted extraction-dispersive liquid–liquid micro-extraction and gas chromatography-mass spectrometry

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 11633-11643 ◽  
Author(s):  
Mohammad Ahmadvand ◽  
Hassan Sereshti ◽  
Hadi Parastar
Keyword(s):  
Methyl Esters ◽  
Multivariate Curve Resolution ◽  
Gas Chromatography Mass Spectrometry ◽  
Assisted Extraction ◽  
Pomegranate Seed ◽  
Second Order Calibration ◽  
Pomegranate Seeds ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Multivariate curve resolution-alternating least squares is proposed for the simultaneous analysis of 18 fatty acid methyl esters in a standard mixture and pomegranate seed sample using vortex-assisted extraction-dispersive liquid–liquid microextraction followed by GC-MS.

Dispersive Liquid–Liquid Microextraction Combined with Microwave Demulsification for Determination of FAME Residuals in Biodiesel Wastewater

2020 ◽  
Vol 58 (10) ◽  
pp. 976-984
Author(s):  
Guo-Wei Yu ◽  
Xia-Jun Wang ◽  
Peng Wang ◽  
Yi-Ping Zhao ◽  
Jing Nie ◽  
...  
Keyword(s):  
Methyl Esters ◽  
Linear Equations ◽  
Gas Chromatography Mass Spectrometry ◽  
Plant Oil ◽  
Purification Method ◽  
Water Washing ◽  
Biodiesel Wastewater ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Abstract Biodiesel consists of various fatty acid methyl esters (FAMEs) that are mainly produced through transesterification of plant oil or animal fat. It is essential for biodiesel to be purified utmostly to meet its product standard before being traded, while the universal purification method has been water washing. However, water washing inevitably causes the residual of FAMEs in wastewater, which represents a loss of industrial profits. For the purpose of determination and monitoring of the FAME profile in wastewater, there is a necessity to develop a fast and reliable approach with small volume of sample in need. Hence, in this study, a combination of dispersive liquid–liquid microextraction (DLLME) and microwave demulsification is applied for the enrichment of residual FAMEs in water, followed by qualitative and quantitative analyses using gas chromatography–mass spectrometry. The results indicate that the optimal extractant in DLLME approach is toluene. And the optimal parameters are 20 mL of water sample, 80 μL of toluene as the extractant, 60 s of ultrasonic irradiation duration, 200 W of microwave power and 2 min of microwave irradiation duration. The standard curves and linear equations obtained with these conditions are used for the quantitative analysis of biodiesel wastewater, which reveals that there was 50.35 mg·L−1 of the total FAME residuals in wastewater. To the best of our knowledge, it is for the first time that the combined technique of DLLME and microwave demulsification is applied in determination of residual FAMEs in water samples. The proposed method corresponds to small volumes of sample and extractant and short analytical period. It also has the potential to be extended to the analysis of other water pollutants.

An efficient, sensitive and fast microextraction method followed by gas chromatography-mass spectrometry for the determination of polycyclic aromatic hydrocarbons in bread samples

2017 ◽  
Vol 9 (44) ◽  
pp. 6246-6253 ◽  
Author(s):  
Reza Rostampour ◽  
Mahdie Kamalabadi ◽  
Marzieh Kamankesh ◽  
Zahra Hadian ◽  
Sahar Jazaeri ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Gas Chromatography Mass Spectrometry ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Polycyclic Aromatic ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Microwave-assisted extraction and dispersive liquid–liquid microextraction (MAE–DLLME) coupled with GC-MS allowed the simultaneous determination of 16 polycyclic aromatic hydrocarbons (PAHs) in bread samples.

Ultrasound-assisted extraction and dispersive liquid–liquid microextraction coupled with gas chromatography-mass spectrometry for the sensitive determination of essential oil components in lavender

2019 ◽  
Vol 11 (11) ◽  
pp. 1541-1550 ◽  
Author(s):  
Ping Chen ◽  
Bing Liu ◽  
Xin Liu ◽  
Jihong Fu
Keyword(s):  
Essential Oil ◽  
Gas Chromatography Mass Spectrometry ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Sensitive Determination ◽  
Ultrasound Assisted ◽  
Oil Components ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Ultrasound-assisted extraction and dispersive liquid–liquid microextraction coupled with GC-MS for the sensitive determination of essential oil components in lavender.

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