کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5497781 1532077 2017 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessing arsenic and selenium in a single nail clipping using portable X-ray fluorescence
ترجمه فارسی عنوان
ارزیابی آرسنیک و سلنیوم در یک قطع ناخن با استفاده از فلورسنت اشعه ایکس قابل حمل
کلمات کلیدی
فلورسنت اشعه ایکس قابل حمل، آرسنیک، سلنیوم،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
چکیده انگلیسی
The feasibility of measuring arsenic and selenium contents in a single nail clipping was investigated using a small-focus portable X-ray fluorescence (XRF) instrument with monochromatic excitation beams. Nail clipping phantoms supplemented with arsenic and selenium to produce materials with 0, 5, 10, 15, and 20 µg/g were used for calibration purposes. In total, 10 different clippings were analyzed at two different measurement positions. Energy spectra were fit with detection peaks for arsenic Kα, selenium Kα, arsenic Kβ, selenium Kβ, and bromine Kα characteristic X-rays. Data analysis was performed under two distinct conditions of fitting constraint. Calibration lines were established from the amplitude of each of the arsenic and selenium peaks as a function of the elemental contents in the clippings. The slopes of the four calibration lines were consistent between the two conditions of analysis. The calculated minimum detection limit (MDL) of the method, when considering the Kα peak only, ranged from 0.210±0.002 µg/g selenium under one condition of analysis to 0.777±0.009 µg/g selenium under another. Compared with previous portable XRF nail clipping studies, MDLs were substantially improved for both arsenic and selenium. The new measurement technique had the additional benefits of being short in duration (~3 min) and requiring only a single nail clipping. The mass of the individual clipping used did not appear to play a major role in signal strength, but positioning of the clipping is important.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 120, February 2017, Pages 1-6
نویسندگان
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