Development of a dispersive liquid–liquid microextraction method for the determination of polychlorinated biphenyls in water

Rezaei, Farzad; Bidari, Araz; Birjandi, Afsoon Pajand; Hosseini, M. Reza; Assadi, Yaghoub

doi:10.1016/j.jhazmat.2008.02.005

Cited by 150 publications

(65 citation statements)

References 28 publications

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“…In this case, SDME preconcentration procedure was more effective as to the received LoD and recovery values. Razaei et al (Rezaei et al 2008) tried DLLME with 500 μL acetone as dispersive solvent and 10.0 μL of chlorobenzene as extraction solvent for 5 ml of PCBs spiked water sample. LoD values of this procedure was improved compared to previously described SPME (Cortazar et al 2002), SDME (Lambropoulou et al 2007) and MASE (McFarland et al1989) Sample preparation for PAHs analysis Two ISO sample preparation procedures (ISO 17993:2002 andISO 28540:2011) based on LLE with hexane are commonly used for PAHs analysis by GC and HPLC techniques.…”

Section: Sample Preparation Procedures For Organochlorinated Pollutantsmentioning

confidence: 99%

Sample preparation procedures for analysis of organochlorinated pollutants and PAHs in surface water samples

Vyviurska

S̆pánik

2014

Acta Chimica Slovaca

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This review focuses on sample preparation procedures used for chromatographic analysis of the most common organochlorinated pollutants and PAHs in water samples. The studied pollutants have a long persistence in environment, possible carcinogenic effects, and their application has been banned in many countries. The standard ISO procedures with the modern sample preparation procedures were compared in the term of recovery effectiveness for target analytes.

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Section: Sample Preparation Procedures For Organochlorinated Pollutantsmentioning

confidence: 99%

Sample preparation procedures for analysis of organochlorinated pollutants and PAHs in surface water samples

Vyviurska

S̆pánik

2014

Acta Chimica Slovaca

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“…Beyond the traits of simplicity of operation and rapidity, consumption of the microextraction solvent was reduced to microlevel volume, and samples prepared in this way were more compatible with analytical instruments. These are profitable and attractive features of DLLME as a sample pre-treatment method [20][21][22][23][24][25].…”

Section: Apparatus and Instrumentation Setupmentioning

confidence: 99%

Development and evaluation of a dispersive liquid-liquid microextraction based test method for quantitation of total anionic surfactants: advantages against reference methods

Bidari

Norouzi²

2010

Open Chemistry

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Abstract:A small-scale, simple, and rapid dispersive liquid-liquid microextraction (DLLME) procedure in combination with fiber optic-linear array detection spectrophotometry (FO-LADS) with charge-coupled device (CCD) detector has been developed, with benefits from the use of a micro-cell. The official reference methods (ASTM D2330 -02, ISO 7875-1), which require tedious procedures, were replaced with a modified method. The new method provides a major reduction in sample size, elimination of the use of expensive glassware, and a decrease in the quantity of chloroform used, as well as increased sensitivity. Our method requires only one twentieth of the sample (5.0 mL), and less than one three-hundredth of microextraction solvent (chloroform = 138 µL). It provides a faster analysis time than official analytical methods (less than one minute). The calibration curve was linear in the range of 6 -80 µg g L −1 of sodium dodecyl sulfate (SDS) with a correlation coefficient (r) of better than 0.99 and the LOD was 2 µg L −1 . The repeatability of the proposed method (n=7) was found to be 4.5% and 3.6% for the concentrations of 0.03 and 0.07 mg L −1 , respectively. The enrichment factor was found to be 75 for SDS.

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“…Especially, a column packed with octadecylsilyl groups bonded silica (C18 column) is mostly employed due to the appropriate hydrophobicity [5,6]. On the other hand, the separation of highly hydrophobic hydrocarbons, such as polycyclic aromatic hydrocarbon (PAH) and poly halogenated aromatic compounds in oil matrix, is still difficult for quantitative determination because the complicated pretreatment is required before authentic reversed phase separations [7][8][9][10][11][12][13][14][15]. Therefore, an achievement of the direct separation of oil-based samples without any complicated pretreatments is preferred.…”

Section: Introductionmentioning

confidence: 99%

C<sub>60</sub>-Fullerene Bonded Silica Monolithic Capillary for Specific Separations of Aromatic Compounds

et al. 2015

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A simple preparation method for C 60 -fullerene bonded silica monolithic capillary by thermal coupling with a specific agent is reported. A silica monolithic capillary was modified with aminopropyl silane by a typical modification method, and then a thermal coupling agent, perfluorophenyl azide (PFPA) was covalently reacted with the amino groups. After C 60 -fullerene was covered over the PFPA-monolith at high density, thermal reaction was carried out at 170 C for 5 h, resulting C 60 -fullerene bonded silica monolith. We qualitatively confirmed all the modification process by elemental analysis and FT-IR, which showed the accomplishment of the all the reactions. According to liquid chromatographic evaluations, C 60 -fullerene bonded silica monolithic capillary provided the specific separation of polycyclic aromatic hydrocarbons (PAHs) by an effective π−π interaction based on the bonded C 60 -fullerene. Even if we used non-polar solvent, n-hexane, as a mobile phase, the effective base-line separation of PAHs was achieved. Additionally, the capillary allowed the separation of aromatic couples, including benzene/anisole, dibenzosuberone/dibenzosuberenone, and chrysene/triphenylene, which have slightly structural differences, depending on the density of π electrons in these compounds.

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Development of a dispersive liquid–liquid microextraction method for the determination of polychlorinated biphenyls in water

Cited by 150 publications

References 28 publications

Sample preparation procedures for analysis of organochlorinated pollutants and PAHs in surface water samples

Sample preparation procedures for analysis of organochlorinated pollutants and PAHs in surface water samples

Development and evaluation of a dispersive liquid-liquid microextraction based test method for quantitation of total anionic surfactants: advantages against reference methods

C<sub>60</sub>-Fullerene Bonded Silica Monolithic Capillary for Specific Separations of Aromatic Compounds

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