Appendix K - Mercury in Sorbent Traps
- Performance-based monitoring of vapor-phase mercury (Hg) emissions in combution flue gas streams using a sorbent trap monitoring system
- Uses in-stack sorbent media couple with analysis of the integrated samples.
- Allows use of various suitable sampling and analytical technoligies.
- Elemental Hg(Hg0)
- Oxidized Hg(Hg+2) - HgCl2
- Known volumes of flue gas are extracted from a stack
- Use paired, in-stack, pre-spiked sorbent media traps at an appropriate nominal flow rate
- Paired train sampling is required to determine measurement precision.
- Sorbent traps are recovered, prepared for analysis
- Section of each sorbent trap is spiked with Hg0 prior to sampling.
- Recovery value is used to correct the individual Hg sample for measurment bias
- Samples may qualify to be shipped as a hazardous material. Please call for IATA codes if you need them.
- Monitoring of vapor-phase Hg emissions under relatively low-dust conditions
- From coal-fired electric utility steam generators
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