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Standards Development
This document specifies a method for the determination of the boiling range distribution of petroleum products by capillary gas chromatography using flame ionization detection. This document is applicable to stabilized crude oils and for the boiling range distribution and the recovery up to and including n-nonane. A stabilized crude oil is defined as having a Reid Vapour Pressure equivalent to or less than 82,7 kPa as determined by IP 481. Annex C specifies an algorithm for merging the boiling point distribution results obtained using this method with the results obtained with EN 15199-3. This will result in a boiling range distribution and recovery up to C120.
WG 9 came across the fact that the SimDis for crude oil standard test method (D7900 and EN 15199-4) has a few issues. Several users in the field indicated that they have troubles with correctly defining the xylene (dimethylbenzene) peaks following the guidance in Annex A. For instance, the chromatogram presented in A.1.d) gives no peak for the p- and o-xylene as identified in Table A.1 (and a non-identified peak next to o-xylene). There are a lot of unidentified peaks described in Table A.1 which are in fact of no help. The (proposed) project leader solved the matter by developing a new example of the chromatogram for identifying individual components. It now includes several other of the components common in crude oils but indicated as I- and N-components in Table A.1. We propose to correct, complement and improve the figures under Annex A of EN 15199-4.
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