کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1242536 969637 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Separation and preconcentration of Pb(II) using ionic liquid-modified silica and its determination by flame atomic absorption spectrometry
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Separation and preconcentration of Pb(II) using ionic liquid-modified silica and its determination by flame atomic absorption spectrometry
چکیده انگلیسی

A new method based on microcolumn packed with ionic liquid-modified silica combined with flame atomic absorption spectrometry has been developed for the determination of lead in environmental samples. Several factors influencing the preconcentration efficiency of lead and its subsequent determination, such as pH of the sample, flow rate, mass of ionic liquid, and interfering effect, have been investigated. Lead could be quantitatively retained by ionic liquid-modified silica in the pH range of 5–7, and then eluted completely with 3.0 mL 1.0 mol L−1 HCl. The detection limit of this method for lead was 0.7 μg L−1 with preconcentration factor of 185, and the relative standard deviation (RSD) was 4.2% at 0.1 μg mL−1 Pb(II). This method has been applied for the determination of trace amount of lead in NIST standard reference material 2709 (San Joaquin Soil) and river water samples with satisfactory results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 84, Issue 1, 15 March 2011, Pages 212–215
نویسندگان
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