Water Supply Pipe Selection (UKWIR)

pH Value of Soils

SOP: 2010

UKAS accredited; MCERTS accredited

Measurement of the pH of a 2:1 water extract of a dried and ground soil sample using a pH meter.

Electrical Conductivity of Soils

SOP: 2020

Measurement of the electrical conductivity of a 2:1 water extract using a conductivity meter.

Aliphatic/Aromatic Petroleum Hydrocarbons in Soils by GCxGC-FID

SOP: 2680

UKAS accredited; MCERTS accredited

UKAS accredited: all bands in the range C₈–C₄₀

MCERTS accredited: all bands in the range C₈–C₃₅

aliphatic banding: >C₅–C₆, >C₆–C₈,>C₈–C₁₀, >C₁₀–C₁₂, >C₁₂–C₁₆, >C₁₆–C₂₁, >C₂₁– C₃₅, >C₃₅– C₄₄

aromatics banding: >C₅–C₇, >C₇–C₈, >C₈–C₁₀, >C₁₀–C₁₂, >C₁₂–C₁₆, >C₁₆– C₂₁, >C₂₁– C₃₅, >C₃₅– C₄₄

Extraction of an as received soil sample, following chemical drying with sodium sulphate, into dichloromethane followed by determination of total petroleum hydrocarbons by two dimensional gas chromatography using flame ionisation detection (GCxGC-FID).

Volatile Organic Compounds (VOCs) in Soils by Headspace GC-MS

SOP: 2760

UKAS accredited; MCERTS accredited

UKAS & MCERTS accredited: please refer to UKAS schedule for individually accredited compounds.

Analysis of an as received soil sample for volatile organic compounds by automated headspace gas chromatography with mass spectrometric detection (HS-GC-MS).

Based upon USEPA Method 8260.

Semi-Volatile Organic Compounds (SVOCs) in Soils by GC-MS

SOP: 2790

UKAS accredited; MCERTS accredited

UKAS & MCERTS accredited. Base upon USEPA Method 8270

Extraction of an as received soil sample into dichloromethane followed by the determination of semi-volatile organic compounds by gas chromatography using mass spectrometric detection (GC-MS).