کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1192337 1492317 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
IRMM-3100a: A new certified isotopic reference material with equal abundances of 233U, 235U, 236U and 238U
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
IRMM-3100a: A new certified isotopic reference material with equal abundances of 233U, 235U, 236U and 238U
چکیده انگلیسی

The new so-called Quad-IRM (“Quadruple Isotope Reference Material”) was prepared from highly enriched 233U, 235U, 236U and 238U isotopic materials using an optimized combination of gravimetrical mixing and mass spectrometry. Within the mixing process the isotope ratios were adjusted to about n(233U)/n(235U)/n(236U)/n(238U) = 1/1/1/1 and certified with expanded relative uncertainties of 0.0054% per mass unit (coverage factor k = 2). This new isotope reference material is ideal for verifying the inter-calibration of multi-detector systems in isotope mass spectrometry.The certified n(233U)/n(236U) ratio of IRMM-3100a was derived from the mass metrology data of the gravimetrical mixing of highly enriched 233U and 236U materials. It was verified by thermal ionization mass spectrometry (TIMS) measurements using the classical total evaporation (TE) and modified total evaporation (MTE) methods. The n(234U)/n(236U), n(235U)/n(236U) and n(238U)/n(236U) ratios were then determined by TIMS using the n(233U)/n(236U) ratio for internal normalization and using a multi-dynamic measurement procedure in order to circumvent any possible influence and uncertainties from Faraday cup efficiencies and amplifier gain factors. The certified n(235U)/n(236U) and n(238U)/n(236U) ratios were additionally verified using the classical and modified total evaporation methods using two TIMS instruments at IRMM and one TIMS instrument at IAEA-SGAS. The verification data can be regarded as results obtained at three independent instruments at two different nuclear safeguards laboratories.

Figure optionsDownload high-quality image (55 K)Download as PowerPoint slideResearch highlights▶ New isotope reference material with equal abundances of 233U, 235U, 236U and 238U. ▶ Isotopic composition is about n(233U)/n(235U)/n(236U)/n(238U) = 1/1/1/1. ▶ Expanded relative uncertainties of 0.0054% per mass unit for the certified ratios (k = 2). ▶ Ideal for inter-calibration of multi-detector systems in isotope mass spectrometry. ▶ Ideal for studying instrumental mass bias effects in TIMS and ICPMS instruments.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 299, Issues 2–3, 15 January 2011, Pages 120–124
نویسندگان
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