کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6552137 160426 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Raman spectroscopy of uranium compounds and the use of multivariate analysis for visualization and classification
ترجمه فارسی عنوان
طیف سنجی رامان از ترکیبات اورانیوم و استفاده از تجزیه و تحلیل چند متغیره برای تجسم و طبقه بندی
کلمات کلیدی
قانونی هسته ای، طیف سنجی رامان، سنگ معدن اورانیوم کنسانتره، تجزیه و تحلیل چند متغیره،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Raman spectroscopy was used on 95 samples comprising mainly of uranium ore concentrates as well as some UF4 and UO2 samples, in order to classify uranium compounds for nuclear forensic purposes, for the first time. This technique was selected as it is non-destructive and rapid. The spectra obtained from 9 different classes of chemical compounds were subjected to multivariate data analysis such as principal component analysis (PCA), partial least square-discriminant analysis (PLS-DA) and Fisher Discriminant Analysis (FDA). These classes were ammonium diuranate (ADU), sodium diuranate (SDU), ammonium uranyl carbonate (AUC), uranyl hydroxide (UH), UO2, UO3, UO4, U3O8 and UF4. Unsupervised PCA of full spectra shows fairly good distinction among the classes with some overlaps observed with ADU and UH. These overlaps are also reflected in the poorer specificities determined by PLS-DA. Higher values of sensitivities and specificities of remaining compounds were obtained. Supervised FDA based on reduced dataset of only 40 variables shows similar results to that of PCA but with closer clustering of ADU, UH, SDU, AUC. As a rapid and non-destructive technique, Raman spectroscopy is useful and complements existing techniques in multi-faceted nuclear forensics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forensic Science International - Volume 251, June 2015, Pages 61-68
نویسندگان
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