SciELO - Scientific Electronic Library Online

 
vol.26 número1Modelling of the Atmospheric Corrosion of Copper in the Province of Las Palmas. Studies Using Classic and Electrochemical Techniques índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Portugaliae Electrochimica Acta

versão impressa ISSN 0872-1904

Port. Electrochim. Acta v.26 n.1 Coimbra  2008

 

Chemically Modified Carbon Paste Electrodes for Ascorbic Acid Determination in Soft Drinks by Flow Injection Amperometric Analysis

 

 

M. Goreti F. Sales,* M.S.A. Castanheira, Rosa M.S. Ferreira, M. Carmo V.F. Vaz, and Cristina Delerue-Matos

 

Requimte/Instituto Superior de Engenharia do Porto, Rua Dr. António Bernardino de Almeida nº 431,

4200-072 Porto, Portugal

 

Received 1st August 2007; accepted 30th January 2008

 

 

Abstract

Simple, rapid and precise amperometric methods for quantification of ascorbic acid (AA) are presented. Glassy carbon (GC), carbon paste (CP) and modified carbon paste (MCP) electrodes are used for this purpose. MCP electrodes are of CP with 10 % vanadate (V). All electrodes are inserted in a wall-jet device with an Ag/AgCl reference electrode and a platinum auxiliary electrode. This device is coupled to a flow injection analysis (FIA) set-up. Hydrodynamic and amperometric parameters are optimized unvaryingly.

GC electrodes present slopes of 4.75 ´ 105 nA L mol-1 (± 6.4 %) under optimum conditions. CP and MCP electrodes show higher sensitivity, with slopes of 6.37 ´ 105 nA L mol-1 (± 6.6 %) and 7.32 ´ 105 nA L mol-1 (± 4.4 %). Linear responses range (1.0-2.0) ´ 10-6 to (0.8-1.0) ´ 10-5 mol L-1. Correlation coefficients were > 0.994 and about 48 samples are analysed per hour. Application of the proposed method to the analysis of soft drinks is presented.

Keywords: ascorbic acid, chemically modified electrodes, flow-injection analysis, amperometry.

 

 

Texto disponível em PDF

Full text only in PDF format

 

 

References

 

1. R. Kohen, A. Nyska, Toxicol. Pathol. 30 (2002) 620–650.        [ Links ]

2. T. Ueki, Y. Noda, Y. Teramoto, R. Ohba, S. Ueda, J. Ferment. Bioeng. 78 (1994) 262–264.

3. M. Surmeian, Drug Develop. Ind. Pharm. 24 (1998) 691–696.

4. M.I. Toral, N. Lara, P. Richtu, A. Tassara, A.E. Tapia, C. Rodriguez, J. AOAC Int. 84 (2001) 37–42.

5. A.R. Medina, M.L.F. Cordora, A.M. Diaz, J. Pharm. Biomed. Anal.20 (1999) 247–254.

6. M. Karatepe, LC GC North America Suppl. S (2004) 104–106.

7. J.H. Khorasani, M.K. Amini, H. Ghanei, S. Tangestaninejad, Iranian J. Chem. & Chem. Eng. Int. 20 (2001) 66-74.

8. M. Noroozifar, M. Khorasani-Motlagh, Turkish J. Chem. 26 (2003) 717–722.

9. M. Noroozifar, M. Khorasani-Motlagh, Talanta 61 (2003) 173–179.

10. N. Lenghor, J. Jakmunee, M. Vilen, R. Sara, G.D. Christian, K. Grupdon, Talanta 58 (2002) 1139–1144.

11. A.A. Ensafi, B. Rezaei, M. Beglari, Anal. Lett. 35 (2002) 909–920.

12. T. Lenarezuk, S. Glab, R. Koncki, J. Pharm. Biomed. Anal. 26 (2001) 163–169.

13. M. Du, F.Z. Liang, B. Tang, Y.J. Luo, H.X. Shen, B. Teng, Y. Liu, Chin. Chem. Lett. 11 (2000) 23–26.

14. X. Wu, Y.X. Diao, C.X. Sun, J.H. Yang, Y.B. Wang,  Talanta 59 (2003) 95–99.

15. R.Y. Wang, Z.H. Lin, R.X. Cai, X.Y. Li, Anal. Sci. 18 (2002) 977–980.

16. T.P. Ruiz, C.M. Lozano, V. Tomas, J. Fenol, Analyst 126 (2001) 1436–1439.

17. J.H. Yang, C.X. Sun, X. Wu, Y.X. Diao, Anal. Lett. 34 (2001) 1331–1339.

18. Z.H. Lin, Q.Wang, L.Y. Mao, R.X. Cai, Anal. Chim. Acta  413 (2000) 167–173.

19. J.H. Yang, Q.L. Ma, F. Huang, L.M. Sun, J.A. Dong, Anal. Lett. 31 (1998) 2757–2766 .

20. A.A. Enfasi, B. Rezaei, Anal. Lett. 31 (1998) 333–342.

21. T.P. Ruiz, C.M. Lozano, V. Tomas, C. Sidrach, Analyst 122 (1997) 115–118.

22. M. Karatepe, LCGC North America Suppl. S (2004) 104–106.

23. H. Iwase, Talanta 60 (2003)1011– 1021.

24. A.R.B. Quiros, J.L. Hernandez, J.S. Lozano, Chromatogr. 53 (2001) S246–S249.

25. L.D. Muller, J. Pharm. Biomed. Anal. 25 (2001) 985–994.

26. R.N. Castro, L.C. Azevedo, M.A.A. Azevedo, C.S.T. Sampaio, J. Liq. Chromatogr. & Rel. Techn.27 (2001) 1015–1020.

27. N. Kaid, J. Potus, J. Nicolas, Sciences Des Aliments 20 (2000) 237–251.

28. H. Iwase, J. Chromatogr.A 881 (2000) 317–326.

29. A. Rumelin, U. Fauth, M. Halmagyi, Clin. Chem. Lab. Med. 37 (1999) 533–536.

30. M.A. Kall, C. Andersen, J. Chromatogr. B 730 (1999) 101–111.

31. M.A. Moser, H.H. Dorfner, B. Kniel, Deutsche Lebensmittel – Rundschau, 95 (1999) 180–185.

32. H. Iwase, I. Ono, J. Chromatogr. A 806 (1998) 361–364.

33. Y.S. Fung, S.Y. Mo, Anal. Chim. Acta 261 (1992) 375–380.

34. G.R. Zhang, X.L. Wang, X.W. Shi, T.L. Sun, Talanta 51 (2000) 1019–1025.

35. J. Wu, J. Suls, W. Sansen, Electrochem. Commun. 2 (2000) 90–93.

36. Z.Q. Gao, K.S. Siow, A. Ng, Y.M. Zhang, Anal. Chim. Acta 343 (1997) 49–57.

37. Y.S. Fung, S.Y. Mo, Anal. Chim. Acta 261 (1992) 375–380.

38. A.M. Almubeil, A. Townshend, Talanta 39 (1992) 1459–1462.

39. J.J. Fei, L.M. Luo, S.S. Hu, Z.Q. Gao, Electroanalysis 16 (2004) 319–323.

40. J.H. Khorasani, M.K. Amini, H. Ghanei, S. Tangestaninejad, Iranian J. Chem. &Chem. Eng. 20 (2001) 66–74.

41. R.A.A. Munoz, R.C. Matos, L. Angnes, Talanta, 55 (2001) 855–860.

42. A.B. Florou, M.I. Prodromidis, S.M.T. Karayanni, M.I. Karayanis, Anal. Chim. Acta 423 (2000) 107–114.

43. G.R. Zhang, X.L. Wang, X.W. Shi, T.L. Sun, Talanta 51 (2000) 1019–1025.

44. J. Wu, J. Suls, W. Sansen, Electrochem. Commun. 2 (2000) 90–93.

45. Z.Q. Gao, K.S. Siow, A. Ng, Y.M. Zhang, Anal. Chim. Acta 343 (1997) 49–57.

46. J. Kulys, E.J. Dcosta, Anal. Chim. Acta 243 (1991) 173–178.

47. S. Alegret, J. Alonso, J. Bartroli, A.A.S.C. Machado, J.L.F.C. Lima, J.M. Paulis, Quim. Anal. 6 (1987) 278.

48. http://www.fao.org/ag/agn/jecfa-additives/specs/Monograph1/Additive-043.pdf, accessed on the 30th of August of 2007.

49. Metrohm, Electrochemical detection in HPLC, Metrohm AG CH-9100, Herisau, (1984).

 

 

* Corresponding author. E-mail address: mgf@isep.ipp.pt

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons