کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1247269 969813 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The determination of tungsten, molybdenum, and phosphorus oxyanions by high performance liquid chromatography inductively coupled plasma mass spectrometery
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
The determination of tungsten, molybdenum, and phosphorus oxyanions by high performance liquid chromatography inductively coupled plasma mass spectrometery
چکیده انگلیسی

The toxic properties of tungsten compounds have recently been brought to the forefront with clusters of human cancer cases, such as in Fallon, NV. Such instances have made the determination of tungsten in natural water supplies vitally important. Tungsten exists in most environmental matrices as the soluble and mobile tungstate anion, although it can polymerize with itself and other anions, such as molybdate and phosphate. Because the geochemical and toxicological properties of these polymer species will vary from the monomeric tungstate parent, determination of tungstate speciation is as critical as determination of total dissolved tungsten concentration. Use of chromatographic separations, followed by element-specific detection is a proven technology for elemental speciation. In the present work, anion exchange chromatography has been coupled to inductively coupled plasma mass spectrometry to determine tungstate, molybdate, and phosphate species at the sub-μg l−1 and μg l−1 levels. The method provides quantitative determination of these species in about 10 min with the capability to simultaneously determine other oxyanion species. The method has been applied to groundwater and extracts of soils amended with tungsten powder. The water soluble tungsten in 1-h deionized water extracts after six months of soil aging was >15 mg l−1, however, only ∼50% of the tungsten was present as monomeric tungstate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 72, Issue 5, 31 July 2007, Pages 1828–1832
نویسندگان
, , , , , ,