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A Monosegmented Flow Titration for the Spectrophotometric Determination of Total Acidity in Vinegar

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Abstract

A monosegmented flow system involving sample and titrant sequential injections and the establishment of a tandem plug between two air bubbles is proposed for automated titrations. The end point is found after successive variations of the sample and titrant volumes, determined by an algorithm based on the one-dimensional optimization method of Fibonacci. The set up includes a multi-port solenoid valve with four inlets and one outlet. The feasibility of the system was demonstrated in the spectrophotometric determination of the total acidity in vinegar with NaOH and phenolphthalein used as the titrant and indicator, respectively. The sample throughput was ca.30 h-1 and consumption of the sample and titrant was about 0.7 ml. The results were in agreement with the expected values, with relative errors lower than ±0.4%. After 12 successive analyses of typical samples with a 47.1–53.4 total acidity, expressed as g l-1 acetic acid, the relative standard deviations of the results were estimated within the 1.2–2.1% range.

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References

  1. C. Pasquini and W. A. Oliveira, Anal. Chem., 57, 2575 (1985).

    Article  CAS  Google Scholar 

  2. J. C. Andrade, M. Ferreira, N. Baccan and O. C. Bataglia, Analyst [London], 113, 289 (1988).

    Article  Google Scholar 

  3. B. F. Reis, M. A. Z. Arruda, E. A. G. Zagatto and J. R. Ferreira, Anal. Chim. Acta, 206, 253 (1988).

    Article  CAS  Google Scholar 

  4. L. C. Tian, X. P. Sun, Y. Y. Xu and Z. L. Zhi, Anal. Chim. Acta, 238, 183 (1990).

    Article  CAS  Google Scholar 

  5. L. C. Faria and C. Pasquini, J. Autom. Chem., 14, 97 (1992).

    Article  Google Scholar 

  6. A. R. A. Nogueira, S. M. B. Brienza, E. A. G. Zagatto, J. L. F. C. Lima and A. N. Araújo, Anal. Chim. Acta, 276, 121 (1993).

    Article  CAS  Google Scholar 

  7. I. Facchin, J. W. Martins, P. G. P. Zamora and C. Pasquini, Anal. Chim. Acta, 285, 287 (1994).

    Article  CAS  Google Scholar 

  8. I. Facchin and C. Pasquini, Anal. Chim. Acta, 308, 231 (1995).

    Article  CAS  Google Scholar 

  9. I. M. Raimundo Jr. and C. Pasquini, Analyst [London], 122, 1039 (1997).

    Article  CAS  Google Scholar 

  10. I. Facchin and C. Pasquini, Quim. Nova, 21, 60 (1998).

    Article  CAS  Google Scholar 

  11. M. Korn, L. F. Gouveia, E. Oliveira and B. F. Reis, Anal. Chim. Acta, 313, 177 (1995).

    Article  CAS  Google Scholar 

  12. J. Bartrolí and L. Alerm, Anal. Lett., 28, 1483 (1995).

    Article  Google Scholar 

  13. L. Alerm and J. Bartrolí, Anal. Chem., 68, 1394 (1996).

    Article  CAS  Google Scholar 

  14. R. S. Honorato, M. C. U. Araújo, R. A. C. Lima, E. A. G. Zagatto, R. A. S. Lapa and J. L. F. C. Lima, Anal. Chim. Acta, in press.

  15. W. J. Blaedel and R. H. Laessig, Anal. Chem., 36, 1617 (1964).

    Article  CAS  Google Scholar 

  16. B. Fleet and A. Y. W. Ho, Anal. Chem., 46, 9 (1974).

    Article  CAS  Google Scholar 

  17. M. R. F. Ashworth, W. Welish, W. Becker and F. Stutz, Fresenius’ Z. Anal. Chem., 273, 175 (1975).

    Article  Google Scholar 

  18. G. Nagy, Z. Fehér, K. Tóth and E. Pungor, Anal. Chim. Acta, 91, 87 (1977).

    Article  CAS  Google Scholar 

  19. S. M. Abitch, Anal. Chim. Acta, 114, 247 (1980).

    Article  Google Scholar 

  20. J. M. Calatayud, P. Campíus and R. Micó, Analyst [London], 112, 1063 (1987).

    Article  Google Scholar 

  21. J. Marcos, A. Rios and M. Valcárcel, Anal. Chim. Acta, 261, 489 (1992).

    Article  CAS  Google Scholar 

  22. T. J. Cardwell, R. W. Cattrall, J. G. Cross, G. R. O’ Connell, J. D. Petty and G. R. Scollary, Analyst [London], 116, 1051 (1991).

    Article  CAS  Google Scholar 

  23. J. Ruzicka, E. H. Hansen and H. Mosbaek, Anal. Chim. Acta, 92, 235 (1977).

    Article  CAS  Google Scholar 

  24. O. Astrom, Anal. Chim. Acta, 105, 67 (1979).

    Article  CAS  Google Scholar 

  25. D. A. Holman, G. D. Christian and J. Ruzicka, Anal. Chem., 69, 1763 (1997).

    Article  CAS  Google Scholar 

  26. M. C. U. Araújo, A. V. Santos, R. S. Honorato and C. Pasquini, J. Autom. Chem., 19, 157 (1997).

    Article  Google Scholar 

  27. L. S. Lasdon, “Optimization theory for large systems”, The Macmillan Company, New York, 1970.

    Google Scholar 

  28. G. H. Jeffery, J. Basset, J. Mendham and R. C. Denney, “Vogel’s textbook of quantitative chemical analysis, 5th Edition”, Longman Scientific & Technical, England, 1989.

    Google Scholar 

  29. M. C. U. Araújo, R. S. Honorato, A. V. Santos and E. C. Silva, Quim. Nova, 19, 86 (1996).

    Google Scholar 

  30. R. S. Honorato, E. C. Silva, M. C. U. Araújo, G. Veras, S. R. B. Santos, J. L. F. C. Lima and R. A. S. Lapa, Lab. Rob. Autom., in press.

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Authors and Affiliations

  1. Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, PE, Brazil

    Ricardo S. Honorato, Rui A. S. Lapa & José L. F. C. Lima

  2. Departamento de Química, Universidade Federal da Paraíba, Caixa Postal 5093, CEP 58051-970, João Pessoa PB, Brazil

    Mário C. U. Araújo & Germano Veras

  3. Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, SP, Brazil

    Elias A. G. Zagatto

  4. Faculdade de Farmácia, Universidade do Porto, Porto, Portugal

    Ricardo S. Honorato

Authors
  1. Ricardo S. Honorato
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  2. Mário C. U. Araújo
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  3. Germano Veras
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  4. Elias A. G. Zagatto
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  5. Rui A. S. Lapa
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  6. José L. F. C. Lima
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Honorato, R.S., Araújo, M.C.U., Veras, G. et al. A Monosegmented Flow Titration for the Spectrophotometric Determination of Total Acidity in Vinegar. ANAL. SCI. 15, 665–668 (1999). https://doi.org/10.2116/analsci.15.665

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  • DOI: https://doi.org/10.2116/analsci.15.665

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