کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1221692 967839 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solid surface spectroscopic methodology for ultra-trace urinary nickel monitoring in smokers and non-smokers' subjects
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Solid surface spectroscopic methodology for ultra-trace urinary nickel monitoring in smokers and non-smokers' subjects
چکیده انگلیسی
Nickel chemical enrichment on nylon membranes previously treated with eosin (eo) is proposed for subsequent quantification by spectrofluorimetry (λem = 547 nm, λexc = 515 nm). Operational variables which have influence on quantitative metal retention have been studied. At optimal experimental conditions, quantitative recovery was reached (superior to 99%), with a detection limit of 0.13 ng L−1 and quantification limit of 0.44 ng L−1. The calibration sensitivity was of 6 × 1013 ng L−1 for the new methodology with a linear range of 0.44-410 ng L−1 Ni(II). The tolerance levels, respect to cations and anions as potential interferents, were studied, with good results. The methodology was validated by standard addition method and satisfactorily applied to urinary nickel determination of 50 subjects including smokers, second hand smokers and non-smokers' samples without previous treatment. Stability of biological samples was daily studied for a period of 1 month. Within-day precision was better than 0.02 CV. The reproducibility (between-day precision) was also evaluated over 3 days by performing six determinations each day with a CV of 0.052. The different groups were evaluated using one-way analysis of variance (ANOVA) followed by Tukey-Kramer multiple comparison test with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical and Biomedical Analysis - Volume 52, Issue 5, 5 September 2010, Pages 694-700
نویسندگان
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