کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7674052 1495680 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Accurate determination of ultra-trace impurities, including europium, in ultra-pure barium carbonate materials through inductively coupled plasma-tandem mass spectrometry
ترجمه فارسی عنوان
تعیین دقیق ناخالصی های فوق العاده ریز، از جمله یوروپیم، در مواد کربنات باریم فوق العاده خالص از طریق اسپکترومتری جرمی پلاسما
کلمات کلیدی
اروپائیوم، کربنات باریم فوق العاده خالص، طیف سنجی جرمی تجمعی پلاسمایی به صورت القایی، در توده، تغییر جرم،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Impurities, especially ultra-trace europium (Eu), in ultra-pure barium carbonate materials were accurately determined through inductively coupled plasma-tandem mass spectrometry (ICP-MS/MS). Two reaction modes, namely, mass shift (with O2 as reaction gas) and on-mass modes(with NH3/He and He as reaction gases), were extensively investigated using Eu+ as target analyte. The use of Eu+ → EuO2+, instead of Eu+ → EuO+, as ion pairs in mass shift mode eliminated polyatomic interferences based on Ba matrix ions (135Ba16O2+ on 151Eu16O+ and 137Ba16O2+ on 153Eu16O+). This procedure exhibited enhanced sensitivity and selectivity. When the ICP-MS/MS was operated in NH3 on-mass mode, Eu+ can be determined in its original mass in interference-free conditions because NH3 did not react with Eu+ but with BaO+ to form a neutral product (BaO). The two reaction modes, especially NH3 on mass mode, were validated to be accurate because their resultant isotope ratios of 153Eu/151Eu matched well with that of the natural abundance ratio. The proposed ICP-MS/MS method is a sensitive technique with a limit of detection as low as 2.0 ng L− 1 for 153Eu+. Compared with conventional single-quadrupole (SQ) ICP-MS, both NH3 on-mass mode and O2 mass shift mode in ICP-MS/MS can be used to accurately determine Eu+ in ultra-pure BaCO3 materials. The detected concentration of Eu+ was 4.0 ng L− 1 to 15 ng L− 1, with spiked recoveries ranging from 100%-110%. ICP-MS/MS was also used to eliminate polyatomic interferences, particularly Ba-based interferences, prior to measurement of Gd and Sm. Impurities, including Na, Mg, Al, K, Mn, Fe, Cr, Sr, and Cs, in ultra-pure BaCO3 materials were also determined using ICP-MS/MS in conventional SQ mode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part B: Atomic Spectroscopy - Volume 123, 1 September 2016, Pages 129-133
نویسندگان
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