Total Nitrogen in Soils
High temperature combustion of the sample in oxygen using an elemental analyser. The resultant nitrogen gas is measured by thermal conductivity detection.
High temperature combustion of the sample in oxygen using an elemental analyser. The resultant nitrogen gas is measured by thermal conductivity detection.
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 BR279 (1995) has largely been superseded by analytical procedures as detailed in TRL 447 and BRE Special Digest:1 2005 3rd Edition.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
All Soil Methods
All Water Methods
All Asbestos Methods
All Asbestos Methods
Measurement of the pH of a 2:1 water extract of a dried and ground soil sample using a pH meter.
Measurement of the electrical conductivity of a 2:1 water extract using a conductivity meter.
Determination of the proportion by mass that is lost from a soil by ignition at 440°C or 550°C.
Measurement of the electrical conductivity using a conductivity meter.
Electrometric determination (on site preferred), using an oxygen sensitive membrane electrode.
Automated colorimetric analysis by a discrete analyser using 1,5-diphenylcarbazide.
