Coupling of homogeneous liquid-liquid extraction and dispersive liquid-liquid microextraction for the extraction and preconcentration of polycyclic aromatic hydrocarbons from aqueous samples followed by GC with flame ionization detection

2016 ◽  
Vol 40 (2) ◽  
pp. 497-505 ◽  
Author(s):  
Mir Ali Farajzadeh ◽  
Elahe Behboudi Khiavi ◽  
Parisa Khorram ◽  
Mohammad Reza Afshar Mogaddam
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Liquid Extraction ◽  
Flame Ionization Detection ◽  
Aqueous Samples ◽  
Flame Ionization ◽  
Liquid Liquid Extraction ◽  
Polycyclic Aromatic ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

scholarly journals DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) IN AQUEOUS SAMPLES BY HPLC-FLD WITH SALTING-OUT LIQUID-LIQUID EXTRACTION

2019 ◽  
Vol 16 (31) ◽  
pp. 95-110
Author(s):  
Byron ACOSTA ◽  
Isabel CIPRIANI-AVILA
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fruits And Vegetables ◽  
Low Cost ◽  
Standard Technique ◽  
Liquid Extraction ◽  
Aqueous Samples ◽  
Salting Out ◽  
Liquid Liquid Extraction ◽  
Polycyclic Aromatic

Polycyclic aromatic hydrocarbons (PAHs) are a group of more than 100 different chemical substances, which contain two, or more fused aromatic rings most of them toxic or carcinogenic. In this study, the Quechers extraction conditions were adapted to perform the extraction of aqueous samples. Quechers has become a standard technique for the analysis of pesticides and other organic substances. Its simplicity and low cost have made it popular in laboratories around the world for processing samples such as fruits and vegetables. The success of this method on solid samples contrasts with the advances in the extraction of aqueous samples where tedious steps of extraction, concentration and solvent changes must be carried out prior to the instrumental analysis. A methodology for the liquid-liquid extraction (water/acetonitrile) of 15 PAHs in aqueous matrices was developed. The mixture was saturated with anhydrous sodium sulfate to cause the partitioning and the extract was analyzed by High-Resolution Liquid Chromatography with Fluorescence Detection (HPLCFLD). The recoveries of analytes achieved (61-114%) were comparable to those expected using traditional extraction techniques, and with moderate uncertainty. The results were consistent with the expectations for of the required analytical and concentration ranges.

Ferrofluid-based dispersive liquid–liquid microextraction using a deep eutectic solvent as a support: applications in the analysis of polycyclic aromatic hydrocarbons in grilled meats

2020 ◽  
Vol 12 (11) ◽  
pp. 1522-1531 ◽  
Author(s):  
Abolghasem Jouyban ◽  
Mir Ali Farajzadeh ◽  
Mohammad Reza Afshar Mogaddam ◽  
Mahboob Nemati ◽  
Ali Akbar Alizadeh Nabil
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Deep Eutectic Solvent ◽  
Microwave Assisted ◽  
Ultrasonic Assisted ◽  
Polycyclic Aromatic ◽  
Dispersive Liquid Liquid Microextraction ◽  
Meat Samples ◽  
Counter Current ◽  
Liquid Microextraction

An ultrasonic-assisted ferrofluid-based dispersive liquid–liquid microextraction procedure combined with microwave-assisted counter current extraction has been used for the extraction of sixteen polycyclic aromatic hydrocarbons from grilled meat samples.

scholarly journals Sample Preparation Improvement in Polycyclic Aromatic Hydrocarbons Determination in Olive Oils by Gel Permeation Chromatography and Liquid Chromatography with Fluorescence Detection

2005 ◽  
Vol 88 (4) ◽  
pp. 1247-1254 ◽  
Author(s):  
Sandra Martinez-López ◽  
Asuncion Morales-Noé ◽  
Agustin Pastor-Garcia ◽  
Angel Morales-Rubio ◽  
Miguel de la Guardia
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Limit Of Detection ◽  
Gel Permeation Chromatography ◽  
Liquid Extraction ◽  
Fluorometric Detection ◽  
Olive Oils ◽  
Liquid Liquid Extraction ◽  
Gel Permeation ◽  
Polycyclic Aromatic

Abstract The determination of 15 polycyclic aromatic hydrocarbons (PAHs) in olive oil samples has been improved in order to obtain a fast methodology with a low limit of detection through the combination of liquid–liquid extraction with acetonitrile and preparative gel permeation chromatography (GPC) prior to the injection of purified extracts into a C18 column. Acetonitrile–water was used as the mobile phase with a gradient from 50 to 95%, w/w, acetonitrile in 30 min. The oven temperature was maintained at 15°C, and fluorometric detection was made at a fixed excitation wavelength of 264 nm and variable, optimal emission wavelength for each analyte ranging from 352 nm for 11-H-benzo(b)fluorene to 500 nm for indeno(1,2,3-cd)pyrene. Recovery for all the compounds studied varied from 75 to 111%, and limit of detection values from 0.05 ng/g for benzo(k)fluoranthene to 0.48 ng/g for indeno(1,2,3-cd)pyrene, corresponding to 0.09 ng/g benzo(a)pyrene. Results were compared with those obtained by liquid–liquid extraction followed by a cleanup on silica and a direct GPC treatment of oil samples diluted in dichloromethane, 2 other methodologies that are appropriate for quantifying PAHs in olive oils. However, the proposed method improves the determination limits, reduces the time of analysis, and provides a highly stable baseline for sample chromatograms.

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