کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5139024 | 1494861 | 2017 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pre-concentration and speciation of inorganic antimony in bottled water and natural water by cloud point extraction with Electrothermal Atomic Absorption Spectrometry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A method for antimony speciation by cloud point extraction (CPE) was optimized and validated in house. The pre-concentration method was based on the selective cloud point extraction of Sb(III) after its complexation with ammonium pyrrolidine dithiocarbamate (APDC) at pH 2.0, separation of a surfactant rich phase on the cloud point of the non-ionic surfactant (Triton X-114) and subsequent determination by Electrothermal Atomic Absorption Spectrometry (ET AAS). Sb(V) was not extracted at pH 2.0. Total Sb was determined after reducing Sb(V) to Sb(III) by l-cysteine. Then, concentration of Sb(V) was calculated by subtracting Sb(III) from total antimony. The main factors affecting separation/pre-concentration were investigated using univariate and multivariate approach. The detection limit for Sb(III) was 0.06 μg Lâ 1, the enrichment factor for this determination was 12, and the relative standard deviation (RSD) was < 5.9%. The proposed method was applied for the speciation of inorganic Sb in different water samples with satisfactory results. For the first time, a case study was conducted with Brazilian mineral waters stored in PET bottles in the speciation of Sb. The results showed that Sb(III) concentrations ranged from 1.8 ± 0.3 μg Lâ 1 to 3.2 ± 0.2 μg Lâ 1. The Sb(V) values ranged from 0.63 ± 0.01 μg Lâ 1 to 1.88 ± 0.01 μg Lâ 1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 133, July 2017, Pages 222-230
Journal: Microchemical Journal - Volume 133, July 2017, Pages 222-230
نویسندگان
Jucimara Kulek de Andrade, Camila Kulek de Andrade, Maria Lurdes Felsner, Sueli Pércio Quináia, Vanessa Egéa dos Anjos,