Direct Measurement of Br and I in Brines by Collision Response Inductively Coupled Plasma-Mass Spectrometry
详细信息
- 责任者：Yang Lin (Chaidamu Comprehensive Geology and Mineral Exploration Institute of Qinghai Province ; Golmud 816000 ; China) ; Yu Shan
- 刊名：Rock and Mineral Analysis
- 出版年：2013
- 卷期：32(3)
- 关键词：ICP—MS ; inductively coupled plasma mass spectroscopy ; 溴 ; bromine ; 碘 ; iodine
- 页码：p.502-505
- 图表：5 tables, 18 refs.
- 分类号：0900
- issnNo：ISSN0254-5357
- isbnNo：CN11-2131/TD
摘要
Many routine methods to determine Br and I in environmental water by Inductively Coupled Plasma-Mass Spectrometry(ICP-MS) have been reported.However,there is little information about the determination of Br and I in brine with a high salt content.In view of the high salinity and high potassium content in the salt lake brine of Chaidamu Basin,a new method for the determination of Br and I in brine by ICP-MS is proposed in this paper.The mass spectrum interference was reduced by using collision response interface mode and using H2 as the collision gas,such as of 39K40Ar+ to 79Br+.The interferences of the matrix elements and instrument drift were corrected by using Rh as internal standard.The memory effect was eliminated by extending the time of fast pump flushing.The proposed method was applied to directly determine levels of Br and I in salt lake brine samples,which were diluted to 200 times.Detection limit and RSD(n=12) were 0.036 μg/mL and 2.77% for Br,0.027 μg/mL and 2.19% for I.Values of recovery obtained were in the range of 91.6%-106.1% for Br and 94.4%-107.7% for I.The established method is also suitable for measuring Br and I for high potassium rock salt samples.