Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls

Authors

Abstract

The multivariate calibration method was applied for the determination of trace amounts of gold based on a hanging mercury drop electrode (HMDE) in the presence of rhodanine, followed by reduction of adsorbed gold by voltammetric scan using differential pulse modulation The optimum experimental conditions are: rhodanine concentration of 0.20 mg mL-1, pH 5.0, accumulation potential of -600 mV versus Ag/AgCl, accumulation time of 100 sec, scan rate of 30 mV s-1 and pulse height of 100 mV. The calibration matrix for partial least squares (PLS) regression was designed with 9 samples. Orthogonal signal correction (OSC) is a preprocessing technique used for removing the information unrelated to the target variables based on constrained principal component analysis. OSC is a suitable preprocessing method for PLS calibration without loss of prediction capacity using electrochemical method. The RMSEP for gold determination with PLS and OSC-PLS were 8.51 and 1.94, respectively. This procedure allows the determination of gold in synthetic and real samples with good reliability of the determination. 

Keywords

References

  1. Machida K, Enyo M, Adachiand G, Shiokawa J (1987)
  2. Synthesis and electrocatalytic properties of rare earth
  3. platinum and palladium bronzes. Bull Soc Jpn 60:411-
  5. Ensafi AA, Keyvanfard M (2002) Kineticspectrophotometric
  6. determination of palladium in
  7. hydrogenation catalyst by its catalytic effect on the
  8. oxidation of pyrogallol red by hydrogen peroxide.
  9. Spectrochim Acta Part A 58:1567-1572.
  10. Niazi A, Ghasemi J, Zendehdel M (2007) Simultaneous
  11. voltammetric determination of morphine and noscapine
  12. by adsorptive differential pulse stripping method and
  13. least-squares support vector machines. Talanta 74:247-
  15. Ghasemi J, Niazi A, Ghorbani R (2006) Determination
  16. of trace amounts of lorazepam by adsorptive cathodic
  17. differential pulse stripping method in pharmaceutical
  18. formulations and biological fluids. Anal Lett 39:1159-
  20. Niazi A (2007) Adsorptive stripping differential pulse voltammetry for determination of trace amounts of noscapine in human plasma. J Chin Chem Soc 54:1195-1200.
  21. Li TH, Zhao QL, Huang MH (2007) Adsorptive anodic stripping voltammetry of zirconium-alizarins red s complex at a carbon paste electrode. Microchim Acta 157:245-249.
  22. Babaei A, Shams E, Samadzadeh A (2006) Simultaneous determination of copper, bismuth and lead by adsorptive stripping voltammetry in the presence of thymolphthalexone. Anal Sci 22:955-959.
  23. Zarei K, Atabati M, Ilkhani H (2006) Catalytic adsorptive stripping voltammetry determination of ultra trace amount of molybdenum using factorial design for optimization. Talanta 69:816-821.
  24. Gholivand MB, Romiani AA (2006) Application of adsorptive stripping voltammetry to the simultaneous determination of bismuth and copper in the presence of nuclear fast red. Anal Chim Acta 571:99-104.
  25. Pirch R, Kubiak WW (2007) Determination of trace arsenic with DDTC-Na by cathodic stripping voltammetry in presence of copper ions. J Electroanal Chem 599:59-64.
  26. Martens H, Naes T (1989) Multivariate Calibration. John Wiley Chichester.
  27. Ghasemi J, Niazi A, Leardi R (2003) Genetic-algorithm-based wavelength selection in multicomponent spectrophotometric determination by PLS application on copper and zinc mixture. Talanta 59:311-317.
  28. Ghasemi J, Niazi A (2005) Two- and three-way chemometrics methods applied for spectrophotometric determination of lorazepam in pharmaceutical formulations and biological fluids. Anal Chim Acta 533:169.
  29. Ghasemi J, Ebrahimi DM, Hejazi L, Leardi R, Niazi A (2006) Simultaneous kinetic-spectrophotometric determination of sulfide and sulfite and genetic algorithim variable selection using partial least squares calibration. J Anal Chem 61:92-98.
  30. Niazi A, Sadeghi M (2006) PARAFAC and PLS applied to spectrophotometric determination of tetracycline in pharmaceutical formulation and biological fluids. Chem Pharm Bull 54:711-713.
  31. Niazi A (2006) Simultaneous spectrophotometric determination of Fe (II) and Fe (III) in pharmaceuticals by partial least squares with chromogenic mixed reagents. Croa Chem Acta 79:573-579.
  32. Wold S, Antii H, Lindgren F, Ohman J (1998) Orthogonal signal correction of near-infrared spectra. Chemom Intell Lab Syst 44:175-185.
  33. Sjoblom J, Svensson O, Josefson M, Kullberg H, Wold S (1998) An evaluation of orthogonal signal correction applied to calibration transfer of near infrared spectra. Chemom Intell Lab Syst 44:229-244.
  34. Andersson CA (1999) Direct orthogonalization. Chemom Intell Lab Syst 47:51-63.
  35. Fearn T (2000) On orthogonal signal correction. Chemom Intell Lab Syst 50:47-52.
  36. Westerhuis JA, Jong S, Smilde AK (2001) Direct orthogonal signal correction. Chemom Intell Lab Syst 56:13-25.
  37. Wold S, Trygg J, Berglund A, Antii H (2001) Some recent developments in PLS modeling. Chemom Intell Lab Syst 58:131-150.
Journal of Chemical Health Risks

Volume 2, Issue 3
Summer 2012

Files

History

  • Receive Date: 08 January 2013
  • Revise Date: 17 January 2021
  • Accept Date: 29 October 2018

Share

How to cite

Statistics