Monitoring mercury in stack emissions

Leading instrumentation company Quantitech has launched a suite of instruments and accessories to enable simple, accurate analysis of mercury in stack emissions following the US EPA approved 'Appendix K' sorbent trap method.

Mercury is a particular concern in processes that involve incineration; especially in coal fired power plants and crematoria. In the United States, for example, all power plants larger than 25 MW are required to monitor and report mercury emissions and to conduct annual Relative Accuracy Test Audits.
Commenting on the launch of this new instrument capability, Quantitech's technical specialist Dr Gareth Pearson said, "The major advantage of the Hydra C Appendix K is that it represents a substantially lower capital cost than other continuous mercury monitoring systems.
"The Hydra C Appendix K system is a semi-continuous sampling system that uses activated carbon sorbent tubes within an in-stack, dual-tube probe to collect mercury from flue gas. The tubes can be left in place for several hours – up to several weeks, giving a measurement of total mercury emitted over that time period. At the end of the sampling period, the used tube is analysed in the new Direct Mercury Analyser which uses Thermal Decomposition and Atomic Absorption to produce results in around 5 minutes."
The Hydra C is simple to operate with minimal training. No sample preparation or digestion procedures are necessary and analysis is fully automated. The instrument has an extended dynamic range and since it is able to test both liquid and solid samples, it can also be employed for other purposes if necessary.

To request a brochure on the Appendix K equipment,
email Dr Pearson: gp@quantitech.co.uk

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