The Improved Method of On-Line Detection of Trace Iron in Power Station Steam-Water Based on O-Phenanthroline Spectrophotography

Abstract:

An on-line detection system, which detected for µg/L level of iron, combined the automatic concentrate device and o-phenanthroline spectrophotography. The improved method has four innovations: the automatic concentrate device, the airtight structure of storing ammonia, a temperature sensor controlled the action of the rotating and dumping, an electronic balance with magnetic stirring to control the coloration process. The detection limit for iron was 0.717μg/L, the sensitivity of the improved method was 0.020. The obtained results by using the improved method were in good agreement with those obtained from graphite furnace atomic absorption spectrometry.

• Periodical: Applied Mechanics and Materials (Volumes 241-244)
• Pages: 61-65
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.241-244.61
• Online since: December 2012
• Authors: Chang Ming Li, Yi Zhao, Pei Pei Yuan, Bing Wang
• Keywords: GFAAS, Improved Method, O-Phenanthroline Spectrophotography, Steam-Water, Trace Iron Determination

References

[1] National standard of the People's Republic of China: GB/T14427-1993[S]. China Standard Press,1994:1-4.

[2] National standard of the People's Republic of China: GB/T14427-2008 [S]. China Standard Press,2009:1-7

[3] Electric Power Industry Standard of the People's Republic of China: DL/T 955-2005[S].

[4] Changming Li, Wubin Qiu, Wenlong Wu: New Development of WOT in supercritical unit feedwater[J].In Chinese.

[5] Changming Li, Wenlong Wu, Junfeng He: The research of weak oxiding treatment in power plant[J],Chinese Society for Electrical Engineering.2009.10. In Chinese.

[6] Changming Li, Wenlong Wu, Junfeng He: The latest progress on research of the oxide coating formation mechanism and  the oxidation processing in steam-water [J], the Second national technology seminar of the supercritical unit. In Chinese.

[7] Mike Caravaggio, P. Eng:North American Power Indurstry Fossil Generation: Technology/Industry Review. The 2011 Annual Meeting of Power Plant Chemistry.

[8] Mike Caravaggio,P. Eng:Cycle Chemistry Control – Monitoring Today and in the Future. The 2011 Annual Meeting of Power Plant Chemistry.

[9] P. J. D'Angelo and S. Shulder. Corrosion Product Transport Monitoring: Continuous On-Line Monitoring Evaluation for Electric Power Generating Stations. Tenth International Conference on Cycle Chemistry in Fossil and Combined Cycle Plants with Heat Recovery Steam Generators June 26-28, 2012 .6 Seattle.