CEN - PREN 15522-2
Oil spill identification - Waterborne petroleum and petroleum products - Part 2: Analytical methodology and interpretation of results based on GC-FID and GC-MS low resolution analyses
|Publication Date:||1 December 2020|
|ICS Code (Pollution, pollution control and conservation):||13.020.40|
|ICS Code (Petroleum products in general):||75.080|
This document describes a method to firstly identify the specific nature of oils spilled in the environment and secondly compare the chemical composition of samples from spilled oil with those of suspected sources. Specifically, the document describes the detailed analytical methods and data processing specifications for identifying the specific nature of oil spills and establishing their correlation to suspected sources. Even when samples or data from suspected sources are not available for comparison, establishing the specific nature (e.g. refined petroleum, crude oil, waste oil, etc.) of the spilled oil can still help to constrain the possible source(s) of the spilled oil.
This methodology is restricted to petroleum related products containing a significant proportion of hydrocarbon-componen
Paraffin as petroleum product (for candles, etc.) is outside the scope of this method, because too many compounds have been removed during the production process . Still the method can be used to analyse the type of product involved.
This method is not directly intended for identifying oil spills in matrixes like groundwater, vegetation, wildlife/tissues, soils, or sediments, and although its application in these matrices is not precluded, it requires caution. The reason for caution is that the extractable compounds in these matrices may alter and/or contribute additional compounds compared to the source sample, which if left unrecognised, can lead to "false non-matches". It is therefore advisable to analyse background sample(s) from seemingly uncontaminated matrix. Including these "non-oil" matrices in this oil spill identification method can require additional sample preparation (e.g. clean-up) in the laboratory prior to analysis and consideration of the extent to which the matrix can affect the correlation achieved. Evaluating the possible effects in these matrices is beyond the scope of this document. Whether the method can be used for this kind of matrices may depend on the oil concentration compared to the "matrix concentration" of the samples. In matrices containing relatively high concentration of oil, a positive match can still be concluded. In matrices containing relatively low concentration of spilled oil, a false non-match or an inconclusive match could be achieved due to matrix effects.