simultaneous spectrophotometric determination of lead, copper and nickel using xylenol orange by partial least squares

نویسندگان

jahan b. ghasemi

chemistry department, faculty of sciences, k.n. toosi university of technology, tehran, iran samira kariminia

chemistry department, faculty of sciences, razi university, kermanshah, iran

چکیده

a partial least squares (pls) calibration model was developed for the simultaneous spectrophotometricdetermination of pb (ιι), cu (ιι) and ni (ιι) using xylenol orange as a chromogenic reagent. the parameterscontrolling behavior of the system were investigated and optimum conditions were selected. the calibrationgraphs were linear in the ranges of 0.0–9.091, 0.0–2.719 and 0.0–2.381 ppm for lead, copper and nickel,respectively. the experimental calibration matrix was designed with 21 mixtures of these chemicals.absorbance data were taken between 350-650 nm and absorbance data were autoscaled. a set of syntheticsample mixtures were used to validate the proposed method. the root mean square errors of predictions(rmseps) and percent of relative prediction errors (rseps) are 0.2164, 0.0744, 0.0735 ppm and ±7.1855, ±6.3193, ± 7.0806% for lead, copper and nickel, respectively.

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Simultaneous spectrophotometric determination of lead, copper and nickel using xylenol orange by partial least squares

A partial least squares (PLS) calibration model was developed for the simultaneous spectrophotometricdetermination of Pb (ΙΙ), Cu (ΙΙ) and Ni (ΙΙ) using xylenol orange as a chromogenic reagent. The parameterscontrolling behavior of the system were investigated and optimum conditions were selected. The calibrationgraphs were linear in the ranges of 0.0–9.091, 0.0–2.719 and 0.0–2.381 ppm for lead...

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15 صفحه اول

spectrophotometric simultaneous determination of nickel, cobalt and copper by orthogonal signal correction–partial least squares

a method for the simultaneous spectrophotometric determination of nickel, cobalt and copper based on theformation of their complexes with 2-(2-thiazolylazo)-p-cresol (tac) in micellar media of triton x-100 isproposed. the absorbance spectra were recorded in the range of 500 to 800 nm. the linear concentrationrange for nickel, cobalt and copper in solution calibration sets were 0.05–1.80, 0.10–6...

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Spectrophotometric simultaneous determination of nickel, cobalt and copper by orthogonal signal correction–partial least squares

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Simultaneous Spectrophotometric Determination of Iron, Cobalt and Copper by Partial Least-Squares Calibration Method in Micellar Medium

Iron, cobalt and copper are metals, which appear together in many real samples, both natural and artificial. Recently a classical univariate micellar colorimetric method has been developed for determination of these metal ions. The organized molecular assemblies such as micelles are used in spectroscopic measurements due to their possible effects on the systems of interest. The ability of mi...

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عنوان ژورنال:
journal of the iranian chemical research

جلد ۵، شماره ۴، صفحات ۲۱۳-۲۲۱

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