کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10530060 960840 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrothermal atomic absorption spectrometric determination of germanium in soils using ultrasound-assisted leaching
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Electrothermal atomic absorption spectrometric determination of germanium in soils using ultrasound-assisted leaching
چکیده انگلیسی
A procedure for determining germanium in soil samples using electrothermal atomic absorption spectrometry is discussed. The analyte is leached from the solid sample by the addition of 1 ml of concentrated hydrofluoric acid to 10-300 mg of sample, and the mixture is then submitted to a 10 min ultrasonic treatment. After adding 0.4 g boric acid and 3 ml concentrated hydrochloric acid, germanium is extracted into 1 ml chloroform and back-extracted into an aqueous phase containing (0.05%, w/v) nickel nitrate. Ten micro liter of aqueous phase are introduced into the atomizer and the analytical signal from germanium is obtained using a fast-heating cycle. The detection limit, calculated using three times the standard error of estimate (sy/x) of the calibration graph, is 0.015 μg g−1. The reliability of the procedure is verified by analyzing several certified reference materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 531, Issue 1, 21 February 2005, Pages 125-129
نویسندگان
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