کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1229074 1495231 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Online spectrophotometric determination of Fe(II) and Fe(III) by flow injection combined with low pressure ion chromatography
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Online spectrophotometric determination of Fe(II) and Fe(III) by flow injection combined with low pressure ion chromatography
چکیده انگلیسی


• Column packed with LPCR for online separation of Fe(II) and Fe(III).
• This method can achieve online separation, reduction and determination.
• This method has wide linear range, strong immunity, high precision.
• This method is suitable for the on-line monitoring.

A simple and new low pressure ion chromatography combined with flow injection spectrophotometric procedure for determining Fe(II) and Fe(III) was established. It is based on the selective adsorption of low pressure ion chromatography column to Fe(II) and Fe(III), the online reduction reaction of Fe(III) and the reaction of Fe(II) in sodium acetate with phenanthroline, resulting in an intense orange complex with a suitable absorption at 515 nm. Various chemical (such as the concentration of colour reagent, eluant and reductive agent) and instrumental parameters (reaction coil length, reductive coil length and wavelength) were studied and were optimized. Under the optimum conditions calibration graph of Fe(II)/Fe(III) was linear in the Fe(II)/Fe(III) range of 0.040–1.0 mg/L. The detection limit of Fe(III) and Fe(II) was respectively 3.09 and 1.55 μg/L, the relative standard deviation (n = 10) of Fe(II) and Fe(III) 1.89% and 1.90% for 0.5 mg/L of Fe(II) and Fe(III) respectively. About 2.5 samples in 1 h can be analyzed. The interfering effects of various chemical species were studied. The method was successfully applied in the determination of water samples.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 138, 5 March 2015, Pages 375–380
نویسندگان
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