کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7640916 1494855 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermoresponsive polymer-mediated extraction for graphite furnace atomic absorption spectrometric determination of trace metals in high purity iron
ترجمه فارسی عنوان
تعیین طیف سنجی جذب اتمی جذب اتمی گرافیت در فلزات ریز در آهن خلوص بالا
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A thermoresponsive polymer-mediated extraction was designed for the selective separation of traces metal ions from high purity iron solutions. Traces metals were extracted into the coagulum of a thermoresponsive polymer, poly(N-isopropylacrylamide) as their dibenzyldithiocarbamate chelates, while Fe(III) matrix remained in the bulk aqueous solution as its water-soluble tartrate chelate. The coagulum was readily collected from the solution and then dissolved with a small amount of N,N-dimethylformamide for the introduction to a graphite furnace of atomic absorption spectrometer. The use of 0.5 g l−1 poly(N-isopropylacrylamide), 2.0 mM sodium dibenzyldithiocarbamate, and 0.6 M diammonium tartrate (pH 10.7) allowed nearly complete (>99.9%) collection of Co(II), Ni(II), Cu(II), Cd(II), Pb(II), and Bi(III) with reducing Fe(III) concentration from 50 mg ml−1 to 14 ± 1 μg ml−1 being lower than the tolerance limits for the determination of traces of metals. Because of effective elimination of iron matrix, six metals at fractional μg g−1 levels were successfully determined with high reproducibility. The accuracy and precision were evaluated by analyzing certified reference materials of high purity iron.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 139, June 2018, Pages 410-415
نویسندگان
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