Desenvolvimento de um novo sistema de microextração em fase sólida com fibra resfriada

Menezes, Helvécio C.; Cardeal, Zenilda de L.

Palavras-chave: CF-SPME, cromatografia a gás com detector de espectrometria de massas, compostos orgânicos voláteis.

Resumo: Este artigo apresenta a descrição e aplicação de um sistema de resfriamento da fibra de microextração em fase sólida. O sistema usa nitrogênio líquido transferido por tubulações de cobre para a parte externa da fibra de SPME. O sistema é simples, barato e possibilita portabilidade. São descritas aplicações para análises ambientais e de alimentos.

Referências Bibliográficas

1. Demeestere K, Dewulf J, Witte B, Langenhove H van. Sample preparation for the analysis of volatile organic compounds in air and water matrices. Journal of Chromatography A 2007; 1153(1-2):130- 144. PMid:17258752. http://dx.doi.org/10.1016/j. chroma.2007.01.012

2. D.ettmer K, Engewald W. Ambient air analysis of volatile organic compounds using adsorptive enrichment. Chromatographia 2003; 57(1):S339-S347. http://dx.doi.org/10.1007/BF02492126

3. L.ord H, Yu Y, Segal A, Pawliszyn J. Breath analysis and monitoring by membrane extraction with sorbent interface. Analytical Chemistry 2002; 74(21):5650- 5657. PMid:12433101. http://dx.doi.org/10.1021/ ac025863k

4. J.anfelt C, Graesboll R, Lauritsen FR. Characterization and optimization of membrane inlets for a miniature ion trap mass spectrometer operating at a high background pressure of humid air. International Journal of Mass Spectrometry 2008; 276(1):17-23. http://dx.doi.org/10.1016/j.ijms.2008.06.019

5. K.etola RA, Kiuru JT, Tarkiainen V, Kokkonen JT, Räsänen J, Kotiaho T. Detection of volatile organic compounds by temperature-programmed desorption combined with mass spectrometry and fourier transform infrared spectroscopy. Analytica Chimica Acta 2006; 562(2):245-251. http://dx.doi. org/10.1016/j.aca.2006.01.069

6. M.orley M, Pawliszyn J. Membrane extraction with a sorbent interface and gas chromatography for the characterization of ethylene in human breath. IEEE Sensors Journal 2010; 10(1):167-172. http://dx.doi. org/10.1109/JSEN.2009.2035215

7. H.uang RJ, Hoffmann TJ. A denuder–impinger system with in situ derivatization followed by gas chromatography–mass spectrometry for the determination of gaseous iodine-containing halogen species. Journal of Chromatography A 2008; 1210(2):135-141. PMid:18849042. http://dx.doi. org/10.1016/j.chroma.2008.08.003

8. H.ippelein M. Analysing selected VVOCs in indoor air with solid phase microextraction (SPME): a case study. Chemosphere 2006; 65(2):271-277. PMid:16581103. http://dx.doi.org/10.1016/j.chemosphere.2006.02.041

9. S.tashenko EE, Martinez JR. Derivatization and solidphase microextraction. TrAC Trends in Analytical Chemistry 2004; 23(8):553-561. http://dx.doi. org/10.1016/j.trac.2004.06.002

10. Pan L, Pawliszyn J. Derivatization/solid-phase microextraction: new approach to polar analytes. Analytical Chemistry 1997; 69(2):196-205. http:// dx.doi.org/10.1021/ac9606362

11. Z.hang ZY, Pawliszyn J. Quantitative extraction using an internally cooled solid phase microextraction device. Analytical Chemistry 1995; 67(1):34-43. http:// dx.doi.org/10.1021/ac00097a007

12. M.enezes HC, Cardeal ZL. Determination of polycyclic aromatic hydrocarbons from ambient air particulate matter using a cold fiber solid phase microextraction gas chromatography–mass spectrometry method. Journal of Chromatography A 2011; 1218(21):3300- 3305. PMid:21093868. http://dx.doi.org/10.1016/j. chroma.2010.10.105

13. G.hiasvand AR, Hosseinzadeh S, Pawliszyn J. New coldfiber headspace solid-phase microextraction device for quantitative extraction of polycyclic aromatic hydrocarbons in sediment. Journal of Chromatography A 2006; 1124(1-2):35-42. PMid:16714028. http:// dx.doi.org/10.1016/j.chroma.2006.04.088

14. M.enezes HC, Paulo BP, Costa NT, Cardeal ZL. New method to determination of naphthalene in ambient air using cold fiber-solid phase microextraction and gas chromatography–mass spectrometry. Microchemical Journal 2013; 109:93-97. http://dx.doi. org/10.1016/j.microc.2012.03.031

15. A.morim LCA, Carneiro JP, Cardeal ZL. An optimized method for determination of benzene in exhaled air by gas chromatography–mass spectrometry using solid phase microextraction as a sampling technique. Journal of Chromatography B 2008; 865(1-2):141- 146. PMid:18346945. http://dx.doi.org/10.1016/j. jchromb.2008.02.023

16. M.oreira MA, Amorim LCA, Cardeal ZL. Analysis of migration to the dibutylphthalate for food simulants in plastic containers using fiber cooled and gas chromatography mass spectrometry. In: 36th International Symposium on Capillary Chromatography; 2012; Riva del Garda.

17. C.ooperation on International Traceability in Analytical Chemistry – CITAC, Eurachem. Guide to Quality in Analytical Chemistry: An Aid to Accreditation. CITAC, Eurachem; 2002 [cited 2013 June 20]. Available from: http://www.eurachem.org/images/stories/Guides/ pdf/CITAC_EURACHEM_GUIDE.pdf.