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Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents

Ali Niazi

Puni tekst: engleski, pdf (105 KB) str. 573-579 preuzimanja: 3.309* citiraj
APA 6th Edition
Niazi, A. (2006). Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents. Croatica Chemica Acta, 79 (4), 573-579. Preuzeto s https://hrcak.srce.hr/5802
MLA 8th Edition
Niazi, Ali. "Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents." Croatica Chemica Acta, vol. 79, br. 4, 2006, str. 573-579. https://hrcak.srce.hr/5802. Citirano 22.02.2020.
Chicago 17th Edition
Niazi, Ali. "Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents." Croatica Chemica Acta 79, br. 4 (2006): 573-579. https://hrcak.srce.hr/5802
Harvard
Niazi, A. (2006). 'Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents', Croatica Chemica Acta, 79(4), str. 573-579. Preuzeto s: https://hrcak.srce.hr/5802 (Datum pristupa: 22.02.2020.)
Vancouver
Niazi A. Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents. Croatica Chemica Acta [Internet]. 2006 [pristupljeno 22.02.2020.];79(4):573-579. Dostupno na: https://hrcak.srce.hr/5802
IEEE
A. Niazi, "Simultaneous Spectrophotometric Determination of FeII and FeIII in Pharmaceuticals by Partial Least Squares with Chromogenic Mixed Reagents", Croatica Chemica Acta, vol.79, br. 4, str. 573-579, 2006. [Online]. Dostupno na: https://hrcak.srce.hr/5802. [Citirano: 22.02.2020.]

Sažetak
Simultaneous determination of FeII and FeIII mixtures by spectrophotometric methods is a difficult problem in analytical chemistry because of spectral interferences. By multivariate calibration methods, such as partial least squares (PLS), it is possible to obtain a model adjusted to the concentration values of the mixtures used in the calibration range. The method is based on developing the reaction between the analytes and 1,10 phenanthroline and 5-sulfosalicylic acid as the chromogenic reagent at pH = 4.5. Experimental conditions were established so as to reduce interferences, decrease system complexity and produce a robust procedure that could be used for routine analysis. Spectra should be recorded from 5 to 10 minutes after mixing the reagents. In this study, the calibration model is based on absorption spectra in the 400–600 nm range for 34 different mixtures of FeII and FeIII. Calibration matrices contained 0.1–7.0 and 0.5–14.0 mg cm–3 of FeII and FeIII, respectively. Detection limits were 0.045 and 0.158 mg cm–3 for FeII and FeIII, respectively. RMSEP for FeII and FeIII was 0.1559 and 0.2067, respectively. The procedure was confirmed by FeII and FeIII analyses in pharmaceutical products, and good reliability of the determination was proven.

Ključne riječi
FeII; FeIII; determination; pharmaceutical; spectrophotometric; partial least squares

Hrčak ID: 5802

URI
https://hrcak.srce.hr/5802

Posjeta: 3.630 *