کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1194010 1492282 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A precise analytical method for bromine stable isotopes in natural waters by GasBench II-IRMS
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A precise analytical method for bromine stable isotopes in natural waters by GasBench II-IRMS
چکیده انگلیسی

A precise analytical methodology for bromine stable isotope was established by GasBench II-IRMS. The bromine isotope analytical technique consists of two key links: the separation and purification of bromine and mass spectrometry of bromine stable isotope. The separation and purification of bromine aims at extracting bromine from natural waters containing a mass of chlorine and then precipitating bromide in form of silver bromide. By reacting with methyl iodide, silver bromide is converted to methyl bromide, which is analyzed by GasBench II-IRMS next. GasBench II-IRMS is mainly composed of a multipurpose online gas preparation device (GasBench II) containing CP-PoraPlot-Q chromatographic column and a gas stable isotope ratio mass spectrometer (MAT253). By mass spectrometry, the internal precision and external precision for this method can be reached at better than ±0.03‰ (n = 12) and ±0.06‰ (n = 8) with analysis time of 15 min,which achieved the international top level. Applying this method to measure bromine isotope compositions of typical geothermal groundwater, oilfield water, saline groundwater and salt lake water in China, different fractionation effect between bromine and chlorine and remarkable bromine isotope fractionation effect from different sources and evolutionary processes were observed.

Figure optionsDownload high-quality image (157 K)Download as PowerPoint slideHighlights
► A precise analytical method for bromine stable isotopes was established by GasBench II-IRMS.
► A recovery rate of 100% was achieved during the extraction of bromine.
► The internal and external precision can be reached at better than ±0.03% and ±0.06% with analysis time of 15 min.
► Some conclusions were achieved by applying the method in a set of natural waters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 338, 15 March 2013, Pages 50–56
نویسندگان
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