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Dergiler / Cumhuriyet Science Journal / 2015 / Cilt: 36 - Sayı: 3

Simultaneous spectrophotometric determination of Zinc and Copper with 4-(2-thiazolylazo) resorcinol using parallel factor analysis (PARAFAC), partial least squares (PLS) and orthogonal signal correction- partial least squares (OSC-PLS).

Ali NİAZİ
Mahdi RAHMANİ
Marzieh HABİBİ
Sayfa
1600–1608
Yayın Tarihi
2015-05-13
DOI
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This procedure allows the simultaneous determination of Cu(II) and Zn(II) with TAR in synthetic and real samples and good reliability of determination was proved.

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Amaç & Hipotez:An Ultraviolet Spectrophotometry method utilizing 4-(2-thiazolylazo)resorcinol (TAR) was developed to simultaneous determination of Zn(II) and Cu(II) using parallel factor analysis (PARAFAC) and partial least squares (PLS) and orthogonal signal correction- partial least squares (OSC-PLS).
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Temel Bulgular & Veri:The work was carried out in pH range from 5.0 to 10.0 and wavelength range was from 200 to 500 nm.
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Sonuç & Katkı:This procedure allows the simultaneous determination of Cu(II) and Zn(II) with TAR in synthetic and real samples and good reliability of determination was proved.
🔬Tür:Modelleme & Sayısal Simülasyon
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:TAR · PARAFAC · PLS

Abstract

Abstract. An Ultraviolet Spectrophotometry method utilizing 4-(2-thiazolylazo)resorcinol (TAR) was developed to simultaneous determination of Zn(II) and Cu(II) using parallel factor analysis (PARAFAC) and partial least squares (PLS) and orthogonal signal correction- partial least squares (OSC-PLS). TAR was chosen as the visible absorbing chelating ligand because of its ability to form stable complexes with a wide variety of metals. The work was carried out in pH range from 5.0 to 10.0 and wavelength range was from 200 to 500 nm. Multivariate calibration models using PLS, OSC-PLS and PARAFAC at different pH were elaborated for ultraviolet spectra deconvolution and metals quantitation. The calibration set was constructed with standard solutions in a concentration range of 2.0-20.0 ppm. The best model for the system were obtained with PARAFAC at pH=8 and. The capabilities of the method for the analysis of real samples were evaluated by determination of Zn(II) and Cu(II) in waste water. The accuracy of method, evaluated through the root mean square error of prediction (RMSEP), were 0.021 and 0.017 for Zn and Cu, respectively. This procedure allows the simultaneous determination of Cu(II) and Zn(II) with TAR in synthetic and real samples and good reliability of determination was proved.

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Bu Makaleye Atıf Yap

NİAZİ, A., RAHMANİ, M., HABİBİ, M. (2015). Simultaneous spectrophotometric determination of Zinc and Copper with 4-(2-thiazolylazo) resorcinol using parallel factor analysis (PARAFAC), partial least squares (PLS) and orthogonal signal correction- partial least squares (OSC-PLS).. Cumhuriyet Science Journal, Cilt: 36 - Sayı: 3, 1600–1608. https://ajindex.com/articles/714653

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Kaynakça (4)

  1. Table 2c. Added and determined results of synthetic mixtures of cooper and zinc using OSC-PLS model (µg/ mL). The optimum number of factors (NF) to be included in the calibration model was determined by computing the prediction error sum of squares (PRESS) for cross-validated models using a high number of factors. The optimum number of factors obtained by PLS, OSC-PLS and PARAFAC models and PRESS values are summarized in Table 2. Determination of uranium and thorium in real matrix samples In order to test the applicability and matrix interferences of the proposed method to the analysis of real samples, the method was applied in a variety of situations. For this purpose, spiked samples were analyzed. The best model for the system were obtained with PARAFAC at pH=8. Tanble 3. OSC-PLS and PARAFAC results applied on the real matrix samples (µg/ mL). 4. CONCLUSIONS The cooper and zinc mixture is a complex system due to its high spectral overlapping between the absorption spectra of their individual component. However, a simple, easy and inexpensive methods such as PLS,OSC-PLS and PARAFAC in a very short time was applied to overcome this problem. Finally it can be concluded that the model developed by the PARAFAC method has more prediction ability especially for real samples with respect to PLS or OSC-PLS methods, which clearly reveals that the tolerance limit of three-way calibration methods for matrix effect is higher than of the two-way methods. L. Morales, M.I. Toral, Simultaneous determination of Cu (II) and Ag (I) on SP sephadex C25 as complexes with 1-phenyl-1, 2-propanedione- 2-oximethiosemicarbazone by derivative spectrophotometry, copper, silver, Journal of AOAC International 90 (6) (2007) 1695-1700.
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  3. A.S. Luna, R.E. Sturgeon, R.C. Campos, Chemical vapor generation: atomic absorption by Ag, Au, Cu, and Zn following reduction of aquo ions with sodium tetrahydroborate(III), Anal. Chem. 72 (15) (2000)3523-3531.
  4. J.G.S. Gupta, J.L. Bouvier, Direct determination of traces of Ag, Cd, Pb, Bi, Cr, Mn, Co, Ni, Li, Be, Cu and Sb in environmental waters and geological materials by simultaneous multi-element graphite furnace atomic absorption spectrometry with Zeeman-effect background correction, Talanta. 42 (1995) 2