کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1246204 969747 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A simple colorimetric FIA method for the determination of pyrite oxidation rates
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A simple colorimetric FIA method for the determination of pyrite oxidation rates
چکیده انگلیسی

A method for the rapid determination of the oxidation rate of naturally occurring pyrite (FeS2) samples is presented. The progress of the oxidation reaction was followed by measurement of the concentration of total dissolved iron using flow injection analysis. Iron was determined using UV–vis detection after reaction with the colorimetric reagent 5-sulfosalicylic acid in the presence of ammonia. The calibration function was linear between 5 and 150 mg L−1, and the detection limit was 0.46 mg L−1. The relative standard deviation was typically less than 1% (n = 10) and the measurement frequency was 60/h. The method was used to quantify the oxidation rate of 10 ground and cleaned pyrite samples (53 μm < x < 106 μm) from various international locations that were subjected to accelerate oxidation in acidic hydrogen peroxide. Results of these experiments showed that there was almost an order of magnitude of difference in oxidation rates of the pyrite samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 82, Issue 5, 15 October 2010, Pages 1809–1813
نویسندگان
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