CHN Elemental Analysis

SOP: 3080

Carbon, Hydrogen, Nitrogen

In-house method based on EN 15407:2011 Solid Recovered Fuels – Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content.  High temperature combustion under oxygen, using an elemental analyser. Resultant nitrogen gas is measured by thermal conductivity detector.  Carbon and hydrogen detected by infra-red.

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A number of different publications and standards cite sulphate methods. BR279 (1995) has largely been superseded by analytical procedures as detailed in TRL 447 and BRE Special Digest:1 2005 3rd Edition. In addition further reference may be made to BS EN 144-1:2009 + A1:2012 for the testing of aggregates and BS 1377:2018 for soils for civil engineering purposes.

Testing to meet the requirements of UKWIR Report Ref. No. 10/WM/03/21 Guidance for the selection of water supply pipes to be used in brownfield sites.

Testing & reporting is undertaken in accordance with BS 3882:2015 Specification for topsoil and BS 8601:2013 Specification for subsoil and requirements for use

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