کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1243190 1495839 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow injection determination of hydrogen peroxide using catalytic effect of cobalt(II) ion on a dye formation reaction
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Flow injection determination of hydrogen peroxide using catalytic effect of cobalt(II) ion on a dye formation reaction
چکیده انگلیسی

A novel flow injection photometric method was developed for the determination of hydrogen peroxide in rainwater. This method is based on a cobalt(II)-catalyzed oxidative coupling of 3-methyl-2-benzothiazolinone hydrazone (MBTH) with N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline (DAOS) as a modified Trinder's reagent to produce intensely colored dye (λmax = 530 nm) in the presence of hydrogen peroxide at pH 8.4. In this method, 1,2-dihydroxy-3,5-benzenedisulfonic acid (Tiron) acted as an activator for the cobalt(II)-catalyzed reaction and effectively increased the peak height for hydrogen peroxide. The linear calibration graphs were obtained in the hydrogen peroxide concentration range 5 × 10−8 to 2.2 × 10−6 mol dm−3 at a sampling rate of 20 h−1. The relative standard deviations for ten determinations of 2.2 × 10−6 and 2 × 10−7 mol dm−3 hydrogen peroxide were 1.1% and 3.7%, respectively. The proposed method was successfully applied to the determination of hydrogen peroxide in rainwater samples and the analytical results agreed fairly well with the results obtained by different two reference methods; peroxidase method and hydrogen peroxide electrode method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 96, 15 July 2012, Pages 180–184
نویسندگان
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