SPME of 52 pesticides and polychlorinated biphenyls: Extraction efficiencies of the SPME coatings poly(dimethylsiloxane), polyacrylate, poly(dimethylsiloxane)-divinylbenzene, Carboxen-poly(dimethylsiloxane), and Carbowax-divinylbenzene

Valor, Ignacio; Pérez, Mónica; Cortada, Carel; Apráiz, D.; Moltó, J.C.; Font, Guillermina

doi:10.1002/1615-9314(20010101)24:1<39::aid-jssc39>3.0.co;2-2

Cited by 63 publications

(37 citation statements)

References 32 publications

(29 reference statements)

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“…[153] Since its development, this innovative technique has found widespread use in environmental analysis. It has, for example, been applied in the determination of volatile organic compounds, [154] biologically active substances, [155] phenols, [156] pesticides, [157] polyaromatic hydrocarbons, and polychlorinated biphenyls [158,159] in water. In a technical note it is presented the application of the SPME hyphenated with a temperature-programmed desorption (TPD) for the analysis of chemicals with wide-ranging volatilities without causing their thermal degradation.…”

Section: Solid-phase Microextraction (Spme)mentioning

confidence: 99%

Sample Preparation for Trace Analysis by Chromatographic Methods

Olariu

Vione

Grinberg

et al. 2010

Journal of Liquid Chromatography & Related Technologies

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The determination of trace analytes in complex natural matrices often requires extensive sample extraction and preparation prior to chromatographic analysis. Correct sample preparation can reduce analysis time, sources of error, enhance sensitivity and enable unequivocal identification, confirmation and quantification. This overview considers general aspects on sample preparation techniques for trace analysis in various matrices. The discussed extraction/enrichment techniques cover classical methods, such as Soxhlet and liquid-liquid extractions along with more recently developed techniques like pressurized liquid extraction, liquid phase microextraction (LPME), accelerated microwave extraction, and ultrasoundassisted extraction. This overview also deals with more selective methodologies, such as solid phase extraction (SPE), solid phase microextraction (SPME) and stir bar sorptive extraction (SBSE). The adopted approach considers the equilibriums involved in each technique. The applicability of each technique in environmental, food, biological and pharmaceutical analyses is discussed, particularly for the determination of trace organic compounds by chromatographic methods.

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Section: Solid-phase Microextraction (Spme)mentioning

confidence: 99%

Sample Preparation for Trace Analysis by Chromatographic Methods

Olariu

Vione

Grinberg

et al. 2010

Journal of Liquid Chromatography & Related Technologies

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“…A sílica gel foi empregada na etapa de limpeza e a GC-MS 96 foi utilizada para a identificação e quantificação. Nos últimos anos, a micro-extração em fase sólida (SPME) tem sido uma técnica alternativa para a determinação de contaminantes ambientais de características polares e apolares apresentando vantagens operacionais e analíticas interessantes [97][98][99][100] . Essa técnica de extração e pré-concentração envolve a partição do analito entre as fases aquosa e gasosa com uma fase estacionária.…”

Section: Métodos Analíticos Para Determinação De Las E Labunclassified

Alquilbenzeno sulfonato linear: uma abordagem ambiental e analítica

Penteado¹,

Seoud²,

Carvalho³

2006

Quím. Nova

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“…Valor et al [29] calculated partition coefficients for a wide range of pesticides including OP insecticides extracted by use of the same fibers; they observed similar trends for all the fiber coatings although with some differences, possibly because of the different extraction conditions (4 µg L -1 , 2 mL sample). Madgic et al [24] also determined K f values for some of the target analytes and the PA and PDMS coatings; no direct comparison could, however, be made, because of the different extraction conditions, in particular the presence of salt that affects the amount of analytes extracted and, as a result, the partition coefficients.…”

Section: Partition Coefficientsmentioning

confidence: 99%

“…(1), because the same information is obtained, i.e. the ratio of analyte per unit volume between the two phases, coating and water, irrespective of whether the analyte is retained by adsorption or absorption [28,29]. Within the text we will use the term partition coefficient in general but it should take into account this theoretical consideration.…”

Section: Partition Coefficientsmentioning

confidence: 99%

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Validation of an SPME method, using PDMS, PA, PDMS-DVB, and CW-DVB SPME fiber coatings, for analysis of organophosphorus insecticides in natural waters

Lambropoulou

Sakkas

2002

Analytical and Bioanalytical Chemistry

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Solid-phase microextraction (SPME) has been optimized and applied to the determination of the organophosphorus insecticides diazinon, dichlofenthion, parathion methyl, malathion, fenitrothion, fenthion, parathion ethyl, bromophos methyl, bromophos ethyl, and ethion in natural waters. Four types of SPME fiber coated with different stationary phases (PDMS, PA, PDMS-DVB, and CW-DVB) were used to examine their extraction efficiencies for the compounds tested. Conditions that might affect the SPME procedure, such as extraction time and salt content, were investigated to determine the analytical performance of these fiber coatings for organophosphorus insecticides. The optimized procedure was applied to natural waters - tap, sea, river, and lake water - spiked in the concentration range 0.5 to 50 micro g L(-1) to obtain the analytical characteristics. Recoveries were relatively high - >80% for all types of aqueous sample matrix - and the calibration plots were reproducible and linear (R(2)>0.982) for all analytes with all the fibers tested. The limits of detection ranged from 2 to 90 ng L(-1), depending on the detector and the compound investigated, with relative standard deviations in the range 3-15% at all the concentration levels tested. The SPME partition coefficients (K(f)) of the organophosphorus insecticides were calculated experimentally for all the polymer coatings. The effect of organic matter such as humic acids on extraction efficiency was also studied. The analytical performance of the SPME procedure using all the fibers in the tested natural waters proved effective for the compounds.

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SPME of 52 pesticides and polychlorinated biphenyls: Extraction efficiencies of the SPME coatings poly(dimethylsiloxane), polyacrylate, poly(dimethylsiloxane)-divinylbenzene, Carboxen-poly(dimethylsiloxane), and Carbowax-divinylbenzene

Cited by 63 publications

References 32 publications

Sample Preparation for Trace Analysis by Chromatographic Methods

Sample Preparation for Trace Analysis by Chromatographic Methods

Alquilbenzeno sulfonato linear: uma abordagem ambiental e analítica

Validation of an SPME method, using PDMS, PA, PDMS-DVB, and CW-DVB SPME fiber coatings, for analysis of organophosphorus insecticides in natural waters

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