Optimization study of BTEX extraction from soils spiked with two kinds of Brazilian diesel by HS SPME using Box–Behnken experimental design and multi-response analysis

Niño, Leidy R.; Grosseli, Guilherme M.; Mozeto, Antônio A.; Fadini, Pedro S.

doi:10.1039/c3ay42253d

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…ranging from 72.1% to 102.2% for the sample with highest analyte concentration, and from 67.0% to 101.2% for the sample with the lowest analyte concentration, were obtained. A comparison with literature, where the presence of BTEX in soil was evaluated using a PDMS fiber with 100 µm [60], reveals that poly(ViBnIm-co-Sty)TFSI fiber yields similar results, in terms of LODs and repeatability, compared with the commercial fiber used, that is 10 times thicker than ours. The lower recoveries obtained for ethylbenzene and xylene when compared to those of benzene and toluene, can be attributed to the high affinity of these analytes for the soil sample, in agreement with the higher octanol/water (Log K OW ) values for ethylbenzene and xylene [50], that hampers their release from the soil.…”

Section: Accepted Manuscriptsupporting

confidence: 63%

Layer-by-layer coated imidazolium – Styrene copolymers fibers for improved headspace-solid phase microextraction analysis of aromatic compounds

Patinha

Pothanagandhi

Vijayakrishna

et al. 2018

Reactive and Functional Polymers

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Section: Accepted Manuscriptsupporting

confidence: 63%

Layer-by-layer coated imidazolium – Styrene copolymers fibers for improved headspace-solid phase microextraction analysis of aromatic compounds

Patinha

Pothanagandhi

Vijayakrishna

et al. 2018

Reactive and Functional Polymers

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“…30 For this process the use of saturated NaCl solution was necessary in order to improve the extraction of the evaluated compounds.…”

Section: Spme Optimization and Validationmentioning

confidence: 99%

SPME determination of low concentration levels of monoaromatic chemical markers in soils after remediation by supercritical fluid extraction

et al. 2015

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Soil contamination by organic compounds has been a serious concern over the years. Among the various forms of pollutant release, gas station contamination has been widely emphasized. The presence of simple aromatic compounds in soils sampled near gas stations may indicate contamination, considering that such compounds are frequently found in petroleum-derived products. The present paper reports on the development of a process that uses pressurized fluids for the remediation of contaminated soils.Supercritical fluid extraction (SFE) employing CO 2 as the solvent and an 11.0 g capacity extraction cell was utilized. In order to demonstrate the efficiency of the process, an analytical procedure employing headspace-solid phase micro extraction (HS-SPME) as the sample preparation method and GC-MS as the separation technique was optimized and validated. Limits of quantification and detection obtained were in agreement with the values established by national and international regulatory agencies. The linear range obtained was from 10 to 260 mg kg À1 , with determination coefficients r 2 > 0.98 for all analyses. Different removal rates were observed for the contaminants studied, the best results being achieved by employing CO 2 in a supercritical state.

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“…Simple 'detector response vs. analyte concentration in a sample' (external standard) calibration may be used only if an extraction effectiveness is reasonably high [45]. A calibration plot is obtained by analyzing soil samples having different analyte concentrations typically prepared using a 'clean' soil with physical chemical properties similar to those of typically analyzed soils, so called matrixmatched calibration [47][48][49][50][51]. Every soil sample is characterized by its own Khs and, therefore, own slope factor of a calibration plot ( Fig.…”

Section: Matrix-matched External Standard Calibrationmentioning

confidence: 99%

Perspectives and challenges of on-site quantification of organic pollutants in soils using solid-phase microextraction

Kenessov

Kozieł

Bakaikina

et al. 2016

TrAC Trends in Analytical Chemistry

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This study explores the current state-of-the-art progress toward on-site quantification of organic pollutants in soils with solid-phase microextraction (SPME). In spite of many available methods, only few publications report on-site analyses of soil samples by SPME. To date, the only application of SPME for the on-site quantification of organic pollutants in soil has been devoted to trichloroethylene. The problem of matrix effects limiting quantification by external standard calibration is discussed. Efficiencies of available approaches for decreasing and controlling matrix effects are evaluated and compared. SPME from a soil sample headspace with internal standard calibration was identified as one of the promising approaches to achieve fast, simple, precise, and accurate on-site quantification of a wide range of organic pollutants in soil. Cold-fiber SPME has a significant development potential, because it is capable of providing lowest detection limits together with a minimum matrix effect. Perspectives for future development of the field are outlined.

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Optimization study of BTEX extraction from soils spiked with two kinds of Brazilian diesel by HS SPME using Box–Behnken experimental design and multi-response analysis

Cited by 10 publications

References 25 publications

Layer-by-layer coated imidazolium – Styrene copolymers fibers for improved headspace-solid phase microextraction analysis of aromatic compounds

Layer-by-layer coated imidazolium – Styrene copolymers fibers for improved headspace-solid phase microextraction analysis of aromatic compounds

SPME determination of low concentration levels of monoaromatic chemical markers in soils after remediation by supercritical fluid extraction

Perspectives and challenges of on-site quantification of organic pollutants in soils using solid-phase microextraction

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