|Table of Contents|

Novel Method of Bromine Isotope Measurement in Groundwater by Gas Bench Ⅱ-IRMS(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2011年第04期
Page:
397-401
Research Field:
水资源与环境
Publishing date:

Info

Title:
Novel Method of Bromine Isotope Measurement in Groundwater by Gas Bench Ⅱ-IRMS
Author(s):
YANG Jie1; 2; MA Teng1; 2; LIU Ling1; 2; 3; LIU Cun-fu1; 2; SHAN Hui-mei1; 2; CHEN Liu-zhu1; 2
1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074,Hubei, China; 2. School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; 3. Chinese Academy for Environmen
Keywords:
bromine;  isotope;  Gas Bench Ⅱ;  mass spectrometric analysis;  groundwater
PACS:
P641.3
DOI:
-
Abstract:
The novel method of bromine stable isotope measurement by Gas Bench Ⅱ-IRMS was developed. Based on the chemical properties that bromine is easier to be oxidized than chloride by K2Cr2O7, Br- is oxidized to Br2 while chloride still leaves in the solution, so bromine could be separated from chloride; bromide is precipitated in the form of AgBr by AgNO3, and then AgBr was converted into CH3Br for bromine stable isotope mass spectrometry analysis. In the chemical reaction, 20 μL CH3I and 0.5 mg AgBr were used. For the whole experiment, 4-10 mg bromine was used, the time of mass spectrometry analysis decreased from 1.5 h to 800 s, and the precision is better than ±0.1‰(2σ). The method could be used to determine bromine isotope in groundwater, and have a wide application in hydrogeology.

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Last Update: 2011-12-20