<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">A new method based on spectrophotometric-partial least-squares procedure was proposed for simultaneously determination of thorium and zirconium using SPADNS (4,5-Dihydroxy-3-(<italic>p</italic>-sulfophenylazo)-2,7-naphthalene disulfonic acid, trisodium salt) as a color reagent. Absorbance measurements were made in the range of γ = 541÷620 nm with 1.0 nm steps in buffered solutions at pH 3.5. The linear ranges were obtained for 0.5÷11.5 and 1.5÷14.5 μg cm-3 for Th4+ and Zr4+ ions, respectively. The limits of detection were determined 0.4 and 1.2 μg cm-3 for thorium and zirconium, respectively. The standard deviation (n = 3) and recovery percent of 10 samples in the prediction set were obtained in the amplitude 0.22÷0.38 μg cm-3 and 91.3÷109.2, respectively. The proposed method was used for simultaneously determination of mentioned ions in spiked real water samples and wastewater. The results show that the method is applicable for the analysis of samples with similar matrix.</abstract>

A new method based on spectrophotometric-partial least-squares procedure was proposed for simultaneously determination of thorium and zirconium using SPADNS (4,5-Dihydroxy-3-(p-sulfophenylazo)-2,7-naphthalene disulfonic acid, trisodium salt) as a color reagent. Absorbance measurements were made in the range of γ = 541÷620 nm with 1.0 nm steps in buffered solutions at pH 3.5. The linear ranges were obtained for 0.5÷11.5 and 1.5÷14.5 μg cm-3 for Th4+ and Zr4+ ions, respectively. The limits of detection were determined 0.4 and 1.2 μg cm-3 for thorium and zirconium, respectively. The standard deviation (n = 3) and recovery percent of 10 samples in the prediction set were obtained in the amplitude 0.22÷0.38 μg cm-3 and 91.3÷109.2, respectively. The proposed method was used for simultaneously determination of mentioned ions in spiked real water samples and wastewater. The results show that the method is applicable for the analysis of samples with similar matrix.

Statistical Calibration of Model Solution of Analytes

Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Acad. G. Bontchev Bl. 11, Bulgaria

Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Acad. G. Bontchev Bl. 11, Bulgaria

Laboratory of Environmental Physics, Georgi Nadjakov Institite of Solid State Physics, 1184 Sofia, Tzarigradsko Chaussee Blvd. 72, Bulgaria

Ecological Chemistry and Engineering S

{"article-title":"Statistical Calibration of Model Solution of Analytes"}

A new method based on spectrophotometric-partial least-squares procedure was proposed for simultaneously determination of thorium and zirconium using SPADNS...

Statistical Calibration of Model Solution of Analytes

Published Online: Nov 08, 2011

Page range: 67 - 75

DOI: https://doi.org/10.2478/v10216-011-0007-x

Keywords
spectrophotometry, partial least-squares method, SPADNS, thorium, zirconium

This content is open access.

Statistical Calibration of Model Solution of Analytes

Published Online: Nov 08, 2011

Page range: 67 - 75

DOI: https://doi.org/10.2478/v10216-011-0007-x

Keywordsspectrophotometry, partial least-squares method, SPADNS, thorium, zirconium

This content is open access.

Keywords
spectrophotometry, partial least-squares method, SPADNS, thorium, zirconium