کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1169266 960627 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow injection determination of aluminium by spectrofluorimetric detection after complexation with N-o-vanillidine–2-amino-p-cresol: The application to natural waters
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Flow injection determination of aluminium by spectrofluorimetric detection after complexation with N-o-vanillidine–2-amino-p-cresol: The application to natural waters
چکیده انگلیسی

An on-line flow injection spectrofluorimetric method for the direct determination of aluminium in water samples is described. The method is based on the reaction of aluminium with N-o-vanillidine–2-amino-p-cresol (OVAC) in acidic medium at pH 4.0 to form a water-soluble complex. The excitation and emission wavelengths were 423.0 and 553.0 nm, respectively, at which the OVAC–Al complex gave the maximum fluorescence intensity at pH 4.0 in a 50% methanol–50% water medium at 50 °C. An interference from fluoride ions was minimised by the addition of Be2+. Other ions were found not to interfere at the concentrations likely to be found in natural waters. The proposed methods were validated in terms of linearity, repeatability, detection limit, accuracy and selectivity. Under these conditions, the calibration was linear up to 1000 μg L−1 (r = 0.999). The limit of detection (3σ) for the determination of Al(III) was 0.057 μg L−1 and the precision for multiple determinations of 3 ng mL−1 Al(III) prepared in ultra-pure water was found to be 0.62% (n = 10).The Schiff base ligand could be used to determine ultra-trace aluminium from natural waters. Analysis of environmental certified reference materials showed good agreement with the certified values. The procedure was found to be equally applicable to both freshwater and saline solutions, including seawater.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 611, Issue 1, 17 March 2008, Pages 62–67
نویسندگان
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