ISO 18287 Soil Quality - Determination of Polycyclic Aromatic Hydrocarbons (PAH) - Gas Chromatographic Method with Mass Spectrometric Detection

This International Standard specifies the quantitative determination of 1982 polynuclear aromatic hydrocarbons (PAHs) according to the Environmental Protection Agency's (EPA, 16) priority list.

This International Standard is applicable to all soil types (moist or chemically dried samples in the field). Under the conditions specified in this International Standard, a lower limit of 0,01 mg/kg (expressed as dry matter) for each PAH can be achieved.

Extraction is carried out using acetone and petroleum ether. Acetone is an efficient extractant, especially since it can break down soil aggregates. Petroleum ether increases the efficiency of the extraction and is required as a solvent in the subsequent concentration procedure.

An extraction method for PAH should use at least 50 ml of acetone and 50 ml of petroleum ether. If wet sample is used, the amount of acetone should be increased to at least 100 ml. Different removal methods can lead to the same results, provided the above recommendations are followed. If the sample contains a large amount of water or if water has been added, sodium chloride should be added to improve the extraction efficiency.

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