Stack Emissions

MSSL provides a specialist analysis service for air emissions samples for customers/contractors engaged in stack emission testing. Stack emissions testing is required in the UK for those industrial sites regulated under the Integrated Pollution Prevention and Control (IPPC) Directive. Sites that are covered by the regulations include Energy from Waste Plants/Incinerators, Cement Kilns and Smelting Plants.

The measurement of dioxins and furans, PCBs and PAHs in ambient air requires a different approach to stack emission monitoring as data is required in units of pg/m3 or even fg/m3. The sampling is normally undertaken using a high volume air sampler which incorporates a polyurethane foam filter (PUF) and sample volumes are much higher than for stack samples. MSSL can provide the prepared PUF filters for ambient air sampling and these are returned to the laboratory after sampling and analysed in a similar way to stack samples.

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This service is provided to clients all over the world and an important feature of the MSSL service is the fast turnaround that can be offered for the analysis. MSSL has 4 modern instruments to undertake the analysis each of which can analyse at least 20 samples per day. Nearly all countries from over the globe have in place legislation which mirrors that of the IPPC directive and we are pleased to offer advice and service enquiries from International customers.

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The Sampling Process

Clients undertake sampling for Polychlorinated Dibenzodioxins and Dibenzofurans (Dioxins and Furans) in accordance with BSEN 1948/USEPA 23 using an isokinetic sampling train.

Our service includes the shipping of the following components of the train: One resin trap containing pre-cleaned XAD-2 spiked with the required C-13 standards, a GFA filter and an empty container for washings. Or as an alternative and depending on your sampling requirements. PUFs may also be supplied. Samples should be taken to BSEN 1948 part 1 or USEPA 0023A methods using isokinetic sampling trains. Once sampling is complete, all components should be returned to MSSL for analysis.

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dioxin/PCB (EfW & Stack residues)

Analysis is performed to BSEN 1948 part 2 & 3 utilising solvent extraction techniques followed by chromatographic clean-up and High Resolution GCMS using the very latest and most up to date Thermo Scientific Dual Focus Spectrometer (DFS). The samples are then analysed for the 17 target Dioxin/Furan congeners to enable calculation of the I-TEQ value. Results are reported as I (NATO) -TEQ. To compare measured data with limit values, the results in ng/sample should to be divided by the air sample volume in m3 and then corrected to the appropriate reference conditions.

The determination of PCBs will be undertaken using similar analysis techniques as for Dioxins. PCBs will be determined as the WHO-12 suite of Dioxin like PCBs.

Poly aromatic hydrocarbons (PAHs)

Marchwood Scientific is also able to carry out analysis of Waste Incineration Directive (WID) PAHs, samples for these compounds are collected at the same time as Dioxins/Furans & PAHs but the laboratory must be advised that analysis is required as the traps and filters need to be spiked accordingly.

See below for some of the suites we offer. Contact our sales team for more information.

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