Wavelength region selection and spectrophotometric simultaneous determination of naphthol isomers based on net analyte signal
Publish place: Iranian Chemical Communication، Vol: 5، Issue: 2
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ICC-5-2_010
تاریخ نمایه سازی: 2 مهر 1398
Abstract:
Naphthol isomers were simultaneously and spectrophotometrically determined in wastewater, using a model based on net analyte signal (NAS). The calibration method used is a variation of the original hybrid linear analysis method as proposed by Goicoechea and Olivieri (HLA/GO). Owing to spectral interferences, the simultaneous determination of mixtures of naphthol isomers, using a spectrophotometric method, is difficult. A rapid and powerful method was used for wavelength selection in the modeling step, based on the minimization of the error indicator (EI), which was estimated as a function of the moving spectral region. The calculation of the net analytical signal using a modified HLA/GO method allows us to determine several figures of merit, as selectivity, sensitivity, analytical sensitivity and limit of detection of the proposed multivariate calibration. The limit of detection (LOD) for 1 and 2-naphthol, were 0.04 and 0.06 (µg/mL) respectively. The proposed model was tested in the analysis of wastewater samples, without previous sample preparation steps, obtaining recovery values between 98 and 104.00%, for 1-naphthol and between 97.00 and 103.00%, for 2-naphthol.
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Authors
Ahmadreza Amraei
Department of Chemistry, Faculty of Science Islamic Azad University, Arak Branch, Arak, Iran
Ali Niazi
Department of Chemistry, Faculty of Science Islamic Azad University, Arak Branch, Arak, Iran
Mohammad Alimoradi
Department of Chemistry, Faculty of Science Islamic Azad University, Arak Branch, Arak, Iran
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