Determination of Bromine in Marine Carbonate Rocks by Using Pyrohydrolysis-Catalytic Spectrophotometry

Li-ping WU; Hong-zhan YUAN; Yun-jun ZHU

2013 Vol. 32, No. 2

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Li-ping WU, Hong-zhan YUAN, Yun-jun ZHU. Determination of Bromine in Marine Carbonate Rocks by Using Pyrohydrolysis-Catalytic Spectrophotometry[J]. Rock and Mineral Analysis, 2013, 32(2): 258-262.

Citation:

Li-ping WU, Hong-zhan YUAN, Yun-jun ZHU. Determination of Bromine in Marine Carbonate Rocks by Using Pyrohydrolysis-Catalytic Spectrophotometry[J]. Rock and Mineral Analysis, 2013, 32(2): 258-262.

Determination of Bromine in Marine Carbonate Rocks by Using Pyrohydrolysis-Catalytic Spectrophotometry

Testing Center of Qinghai Chaidamu Comprehensive Geological Exploration Academy, Ge′ermu 816000, China

Received Date: 21 September 2011

Accepted Date: 01 March 2012

Abstract

Abstract

It is very important to research the primary productive forces of the ancient sea in order to attempt to find a solution for the current energy and climate problems. At present, all of the proxies to estimate the primary productive forces of the sea have certain limitations. In this paper, a new proxy of Br is introduced and the description of establishing a new method for Pyrohydrolysis-Catalytic Spectrophotometry to digest marine carbonate rock and determine Br. The Permian marine carbonate rocks were decomposed by pyrohydrolysis, the Br was trapped by NaOH solution (0.1%) and measured by Catalytic Spectrophotometry. The optimal experimental conditions for pyrohydrolysis and the optimal wave length for Catalytic Spectrophotometry are described. The recovery rates were in the range of 97.5%-101.6% with RSD (n=10) from 1.2% to 3.6%. This experimental technique is highly suitable for marine carbonate rock samples due to its use of commonly available equipment, simple operation, short operational process and low cost.
- marine carbonate rocks /
- bromine /
- pyrohydrolysis /
- Catalytic Spectrophotometry

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References

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