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      Determination of biphenyl and biphenyl oxide in aqueous samples by headspace single drop microextraction coupled to gas chromatography

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          Abstract

          In this work, biphenyl and biphenyl oxide were extracted by headspace single drop microextraction (HS-SDME) and analyzed by gas chromatography-flame ionization detection (GC-FID). The extraction occurred from the tip of a microsyringe by suspending a 3.5 µL drop of toluene, as extracting solvent, containing acetonaphton, as internal standard. The effect of different parameters such as the nature of extraction solvent, microdrop and sample temperatures, stirring rate, microdrop and sample volumes, ionic strength and extracting time on the extraction efficiency of the analytes were investigated and optimized. Under optimized conditions the limits of detection (S/N = 3) of biphenyl and biphenyl oxide were 0.40 ± 0.03 and 0.30 ± 0.06 µg mL‑1, respectively. Good linearities were obtained for both analytes with the correlation coefficients higher than 0.997 and the relative standard deviations (R.S.D.) were in the range of 1-3%. The recoveries of analytes from spiked water samples were near to 100%.

          Translated abstract

          Neste trabalho, bifenila e óxido de bifenila foram extraídos por microextração em headspace com única gota (HS-SDME) e analisados por cromatografia gasosa com detector de ionização em chama (GC-FID). A extração ocorreu a partir da ponta de uma microsseringa, pela suspensão de uma gota de tolueno, de 3,5 µL, como solvente extrator, contendo acetonaftona como padrão interno. O efeito de diferentes parâmetros como a natureza do solvente de extração, temperaturas da amostra e da microgota, velocidade de agitação, volumes da amostra e da microgota, força iônica e tempo de extração na eficiência da extração dos analitos foram investigados e otimizados. Sob condições ótimas, os limites de detecção (S/N = 3) da bifenila e óxido de bifenila foram 0,40 ± 0,03 e 0,30 ± 0,06 µg mL-1, respectivamente. Boas linearidades foram obtidas para ambos analitos com os coeficientes de correlação superiores a 0,997 e desvios-padrão relativos (R.S.D.) de 1 a 3%. As recuperações dos analitos a partir das amostras de água enriquecida foram próximas a 100%.

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          Most cited references2

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          EPA Methods, 1625-BNW, 1625-S; Semivolatile Organic Compounds by Isotope Dilution GC/MS

          (1995)
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            Ullmann's Encyclopedia of Industrial Chemistry A

            P. Catzc (1989)
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              Author and article information

              Journal
              jbchs
              Journal of the Brazilian Chemical Society
              J. Braz. Chem. Soc.
              Sociedade Brasileira de Química (São Paulo, SP, Brazil )
              0103-5053
              1678-4790
              April 2012
              : 23
              : 4
              : 602-609
              Affiliations
              [01] orgnameK. N. Toosi University of Technology orgdiv1Department of Chemistry
              [02] Tehran orgnameIranian National Institute for Oceanography orgdiv1Department of Marine Living Resources Iran
              [03] Tehran orgnameTarbiat Modares University orgdiv1Department of Chemistry Iran
              Article
              S0103-50532012000400004 S0103-5053(12)02300404
              10.1590/S0103-50532012000400004
              e84a8a4b-e8f6-4bb1-be61-332d8dedf073

              This work is licensed under a Creative Commons Attribution 4.0 International License.

              History
              : 02 February 2012
              : 12 June 2011
              Page count
              Figures: 0, Tables: 0, Equations: 0, References: 34, Pages: 8
              Product

              SciELO Brazil

              Categories
              Articles

              biphenyl,single drop microextraction,headspace,biphenyl oxide

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