کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10561594 969779 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preconcentration/preelution ion chromatography for the determination of perchlorate in complex samples
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Preconcentration/preelution ion chromatography for the determination of perchlorate in complex samples
چکیده انگلیسی
The determination of perchlorate in complex matrices by ion chromatography (IC) with an online preconcentration and preelution technique is discussed. The method was applied to different sample types containing large concentrations of matrix anions that would otherwise interfere with analysis via conventional IC. The present approach was highly effective in removing most of the matrix anions and was thus resistant to the interferences commonly encountered in a high ionic strength background. Method performance was evaluated by analyzing for low-level perchlorate in synthetic high ionic strength solutions, tissue extracts, and hydroponic nitrate fertilizer samples. Not only is it easier to practice the present method compared to USEPA Method 314.0, but for most of these samples the present approach provided equal to or better recovery of perchlorate than Method 314.0. With a sample of specific conductance 12,650 μS cm−1, for example, the present method provided a perchlorate recovery of 101% at the 25 μg L−1 level versus 89% by EPA Method 314.0. Method detection limits of perchlorate in hydroponic fertilizer samples with this method (130-190 μg kg−1) are the lowest thus far reported.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 65, Issue 3, 15 February 2005, Pages 750-755
نویسندگان
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