1998
DOI: 10.1051/analusis:1998129
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Analysis of selected gaseous organic micro-pollutants in air by means of solid phase microextraction-gas chromatography-mass spectrometry. Calibration problems

Abstract: Abstract. In this work, problems related to calibration of solid phase microextraction (SPME) device were described. The effects of humidity and temperature on organic pollutants sampling from gaseous matrices on a 100 µm PDMS coated SPME fiber were studied. Standard gaseous mixtures used in these studies were generated by the permeation method and humidified to known levels of relative humidity. The SPME-GC-MS based procedure was used to determine organic vapours (carbon tetrachloride, toluene, chlorobenzene,… Show more

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Cited by 23 publications
(14 citation statements)
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References 9 publications
(14 reference statements)
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“…There are a number of reported approaches of SPME calibration (13–15). Two types of calibration were conducted: one in which a known quantity of 2‐phenoxyethanol was added directly into a vial, and the second, where a known quantity of 2‐phenoxyethanol was added to paper disks at the bottom of a vial.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…There are a number of reported approaches of SPME calibration (13–15). Two types of calibration were conducted: one in which a known quantity of 2‐phenoxyethanol was added directly into a vial, and the second, where a known quantity of 2‐phenoxyethanol was added to paper disks at the bottom of a vial.…”
Section: Methodsmentioning
confidence: 99%
“…There are a number of reported approaches of SPME calibration (13)(14)(15). Two types of calibration were conducted: one in which a known quantity of 2-phenoxyethanol was added directly into a BRAZEAU AND GAUDREAU .…”
Section: Calibrationmentioning
confidence: 99%
“…Na revisão bibliográfica realizada não se encontrou um modelo teórico que considerasse o valor de umidade do local de amostragem diretamente no cálculo da concentração de analitos no ar. Então, a alternativa encontrada por Gorlo et al 23 e Namiesnik et al 24 foi realizar a quantificação de analitos no ar utilizando um sistema de calibração onde a temperatura, velocidade e umidade do ar durante a calibração eram próximas ao local de amostragem. A utilização da mesma fibra para coleta dos analitos em amostras e em câmaras para calibração diminuem os erros relacionados à fibra, além de poder gerar condições atmosféricas o mais próximo possível da amostra 25 .…”
Section: Processo De Absorçãounclassified
“…A principal interferência observada nos trabalhos que utilizavam fibras porosas foi a saturação e competição por sítios ativos da fase devido à presença de vários COV na matriz, como mostra o trabalho de amostragem de compostos voláteis de enxofre 44 . Para uma amostragem e análise com boa exatidão, a umidade do local estudado deve ser considerada no processo de quantificação de COV, conforme discutido anteriormente na descrição do processo de absorção 23,24,29 .…”
Section: Aplicações Da Amostragem De Compostos Voláteis Utilizando a unclassified
“…The technique was developed for the extraction, in static mode, of volatile organic compounds (VOCs) directly from liquids or gaseous phases [1,2,3]. Air sampling has also been performed in dynamic mode [4,5,6]. For SPME of semi-volatile airborne compounds with high partition coefficients, K fibre/air , and consequently high capacity factors (k′=K/β), the time required to reach equilibrium can be long (β is defined as the volume ratio between the static gas layer and the fibre coating).…”
mentioning
confidence: 99%