کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1244081 1495801 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic solid phase extraction for the determination of trace antimony species in water by inductively coupled plasma mass spectrometry
ترجمه فارسی عنوان
استخراج فاز جامد مغناطیسی برای تعیین گونه های آنتی ژن ردیابی در آب با استفاده از طیف سنجی جرم پلاسما همراه با القایی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Magnetic SPE combined with ICP-MS was developed for speciation of trace antimony.
• C8-Fe3O4@SiO2 nanoparticle was prepared and used as magnetic SPE adsorbent.
• APDC was used as the additive to form hydrophobic complexes with Sb species.
• Separation and perconcentration of Sb(III) and Sb(V) was achieved by adjusting pH.

A new magnetic solid phase extraction (MSPE) method using octyl-immobilized silica-coated magnetic Fe3O4 (C8-Fe3O4@SiO2) nanoparticles as the MSPE adsorbent combined with inductively coupled plasma mass spectrometry (ICP-MS) has been developed for speciation analysis of Sb(III) and Sb(V). At pH 5.0, Sb(III) forms a hydrophobic complex with ammonium pyrrolidine dithiocarbamate (APDC) and is retained on C8-Fe3O4@SiO2 nanoparticles, whereas Sb(V) remains as free species in aqueous solution. At pH 2.0, both Sb species (total Sb) form hydrophobic APDC complexes, being retained on the adsorbent. Thus, sensitive speciation analysis of Sb(III) and Sb(V) could be achieved by selective SPE of either Sb(III) or total Sb under different pH on C8-Fe3O4@SiO2 nanoparticles. The experimental parameters, such as pH of solution, concentration of APDC, eluent type and sample volume were optimized in detail. The limits of detection (LOD, 3δ, n=10) of this MSPE method was 0.001 μg L−1 and 0.004 μg L−1, respectively, for Sb(III) and Sb(V). The precision of the method (Relative standard deviation, RSD, n=6) for Sb(III) and Sb(V) at 1.0 μg L−1 was 3.4% and 4.6%, respectively. In order to verify the accuracy of the method, certified reference material (GSB 07-1376-2001) of environmental water was analyzed and the result obtained was in good agreement with the certified values. This proposed method is simple, accurate and sensitive, and can be applied to the speciation of Sb(III) and Sb(V) in environmental waters without any pre-reduction or pre-oxidation operation.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 134, 1 March 2015, Pages 292–297
نویسندگان
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