کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1181855 1491644 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous Rapid Determination of Halogens in Clay Using Pyrohydrolysis Combined with Ion Chromatography
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Simultaneous Rapid Determination of Halogens in Clay Using Pyrohydrolysis Combined with Ion Chromatography
چکیده انگلیسی

An ion chromatography (IC) method for rapid determination of halogens (F, Cl, Br and I) simultaneously in clay with pyrohydrolysis as sample digestion was developed. The parameters that significantly affect pyrohydrolysis were investigated and the following conditions of pyrohydrolysis were optimized. 2.0 g clay sample and V2O5 were put into the reactor at 1000 °C for 10 min; the mass ratio of clay sample to accelerator V2O5 was 1:1 and air flow rate was 90 mL min-1; 15 mL solution containing 5.4 mM Na2CO3 and 5.1 mM NaHCO3 was used as receiver solution. The detection of analyte by this method following the proposed pyrohydrolysis procedure indicated that F, Cl, Br and I in clay were presented as F−, Cl−, Br− and I− in receiver solution which were well separated by IC. The accuracy of this approach was confirmed by the analysis of four clays spiked with Chinese Soil Reference Materials (SRMs). The limits of detection (LOD) were 0.030, 0.043, 0.09 and 0.13 μg g−1 for F, Cl, Br and I, respectively. By using a relatively simple and low cost pyrohydrolysis system, up to five samples can be processed per hour, and then F, Cl, Br and I can be determined in clay and other inorganic samples.

The IC chromatograms of halogens (F, Cl, Br and I) in clay were obtained after pyrohydrolysis for sample digestion. The proposed method is rapid, simple, accurate, reliable, lower consumption and can be widely used for routine analysis of the four halogens in clay and other inorganic samples.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Analytical Chemistry - Volume 41, Issue 10, October 2013, Pages 1499–1504
نویسندگان
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