کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581859 | 877848 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Zincon-modified activated carbon for solid-phase extraction and preconcentration of trace lead and chromium from environmental samples
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Zincon-modified activated carbon for solid-phase extraction and preconcentration of trace lead and chromium from environmental samples Zincon-modified activated carbon for solid-phase extraction and preconcentration of trace lead and chromium from environmental samples](/preview/png/581859.png)
چکیده انگلیسی
A new method that utilizes zincon-modified activated carbon (AC-ZCN) as a solid-phase extractant has been developed for simultaneous preconcentration of trace Cr(III) and Pb(II) prior to the measurement by inductively coupled plasma optical emission spectrometry (ICP-OES). The separation/preconcentration conditions of analytes were investigated, including effects of pH, the shaking time, the sample flow rate and volume, the elution condition and the interfering ions. At pH 4, the maximum adsorption capacity of Cr(III) and Pb(II) onto the AC-ZCN were 17.9 and 26.7 mg gâ1, respectively. The adsorbed metal ions were quantitatively eluted by 1 mL of 0.1 mol Lâ1 HCl. Common coexisting ions did not interfere with the separation. According to the definition of IUPAC, the detection limits (3Ï) of this method for Cr(III) and Pb(II) were 0.91 and 0.65 ng mLâ1, respectively. The relative standard deviation under optimum condition is less than 3.5% (n = 8). The method has been applied for the determination of Cr(III) and Pb(II) in biological materials and water samples with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 166, Issue 1, 15 July 2009, Pages 133-137
Journal: Journal of Hazardous Materials - Volume 166, Issue 1, 15 July 2009, Pages 133-137
نویسندگان
Zhenhua Li, Xijun Chang, Zheng Hu, Xinping Huang, Xiaojun Zou, Qiong Wu, Rong Nie,