کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
584845 | 877899 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Automatic on-line pre-concentration system using a knotted reactor for the FAAS determination of lead in drinking water
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
The procedure allows the determination of lead with a 0.43 μg Lâ1 detection limit (3Ï/S) and precisions (expressed as relative standard deviation) of 4.84% (N = 7) and 2.9% (N = 7) for lead concentrations of 5 and 25 μg Lâ1, respectively. The accuracy was confirmed by the determination of lead in the NIST SRM 1643d trace elements in natural water standard reference material. The pre-concentration factor obtained is 26.5 and the sampling frequency is 48 hâ1. The recovery achieved for lead determination in the presence of several ions demonstrated that this procedure could be applied to the analysis of drinking water samples. The method was applied for lead determination in drinking water samples collected in Jequié City, Brazil. The lead concentration found in 25 samples were always lower than the permissible maximum levels stipulated by World Health Organization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 141, Issue 3, 22 March 2007, Pages 540-545
Journal: Journal of Hazardous Materials - Volume 141, Issue 3, 22 March 2007, Pages 540-545
نویسندگان
Anderson S. Souza, Geovani C. Brandão, Walter N.L. dos Santos, Valfredo A. Lemos, Edgard M. Ganzarolli, Roy E. Bruns, Sérgio L.C. Ferreira,