کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10561025 | 969759 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Batch-injection stripping voltammetry (tube-less flow-injection analysis) of trace metals with on-line sample pretreatment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Batch-injection stripping voltammetry (tube-less flow-injection analysis) of trace metals with on-line sample pretreatment Batch-injection stripping voltammetry (tube-less flow-injection analysis) of trace metals with on-line sample pretreatment](/preview/png/10561025.png)
چکیده انگلیسی
The most essential limitation of batch-injection analysis (BIA) methodology compared to other flow methods (CFA, FIA, SIA) is the lack of possibility of on-line sample processing in the measuring system. Some procedures of on-line sample pretreatment in BIA are possible by changing the plastic tip of the automatic micropipette used for sample injection into a flow-through reactor, e.g. by packing it with a bed of a solid sorbent. This concept is employed in the voltammetric stripping determinations of trace metals using a bed of commercial chelating resin Chelex-100. It was found that, besides the electrochemical preconcentration of analytes in the form of amalgams on the surface of mercury thin film electrodes, an approximately 10-fold additional preconcentration can be achieved on the packed sorbent bed by using different volumes of aspirated sample solution and eluent. This procedure allows also efficient elimination of some matrix effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 68, Issue 2, 15 December 2005, Pages 394-400
Journal: Talanta - Volume 68, Issue 2, 15 December 2005, Pages 394-400
نویسندگان
Marek Trojanowicz, PrzemysÅaw KoźmiÅski, Humberto Dias, Christopher M.A. Brett,