کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1227519 1494867 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of an on line miniaturized non-chromatographic arsenic speciation system
ترجمه فارسی عنوان
توسعه یک سیستم اختصاصی آرسنیک غیر کروماتوگرافی مینیاتوری
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• A novel FI-UV-HG-ETAAS system has been designed for arsenic speciation.
• A miniaturized FI system for As speciation is proposed.
• FI system design allowed minimal reagent consumption.
• Simple hydride trapping method did not require carrier gas.
• Method was applied to water from As endemic regions of Argentina.

An arsenic speciation method is proposed introducing selective hydride generation, UV photooxidation and hydride trapping on oxidized multiwall carbon nanotubes (CNTs) with electrothermal atomic absorption spectrometry (ETAAS) for detection. To this end a flow injection system was designed to focus on miniaturization with minimal reagent consumption. As a result reagent consumption was kept in μL level with no need of carrier gas for hydride transport. This study obtained an enhancement factor of 60 when 2 mL of sample were loaded in the gas–liquid separator, arsine adsorbed on CNTs, and eluted with 30 μL of 5% HNO3 (v v− 1). A limit of detection (LoD) of 0.78 ng L− 1 was obtained. The precision was evaluated by relative standard deviation (RSD%) corresponding to 8.3% (n = 10). The method determined organic and inorganic arsenic fractions; and As3 + and As5 + concentrations in well and cistern water samples from arsenic endemic regions of Argentina.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 127, July 2016, Pages 199–205
نویسندگان
, , ,