This standard specifies two calculation procedures (¿method A¿ and ¿method B¿) for PCB content. The
basis for this quantification is taken from the chromatographic results of EN 12766-1:2000 in which all
necessary experimental procedures are described for the specific analysis of unused, used and treated
(e.g. dechlorinated) petroleum products including synthetic lubricating oils and mixtures of vegetable oils.
The method is also applicable to petroleum products and synthetic lubricating oils suitably recovered from
other materials, e.g. from waste materials. Both methods have different strengths and weaknesses which
are described in the next paragraphs and which must be considered before use in a specific application.
Proper application of either method A or method B needs to be carefully considered before use in a
specific application.
Using method A, special care needs to be exercised to avoid interferences from non PCB substances
which may occur in the chromatogram. Therefore, method A can be used predominantly for the analysis
of used and unused insulating oils. It is recommended not to use calculation method A without special
precautions for other than above-mentioned products. Calculation method A can produce two alternative
sets of results, (¿All Probables¿ and ¿All Possibles¿). Therefore, care needs to be taken in order to
interpret these results in the correct manner.
Method B uses as intermediate result the sum of six congeners, which belong to the most abundant in
almost all technical PCB materials, thereby minimizing potential interferences from other (coeluting) non
PCB substances. To obtain the PCB content, the intermediate sum from six congeners needs to be
multiplied by a multiplication factor. Calculation Method B can be used predominantly for the analysis of
liquids from used and waste materials of unknown origin and for samples with low PCB contents.
Diese Norm legt zwei Berechnungsverfahren ("Verfahren A" und "Verfahren B") für den PCB-Gehalt fest. Die Basis für diese Gehaltsbestimmung ist den chromatographischen Ergebnissen aus EN 12766-1 entnommen. In EN 12766-1 sind alle notwendigen experimentellen Schritte für die spezifische Analyse von ungebrauchten, gebrauchten und behandelten (z. B. entchlorierten) Mineralölerzeugnissen, einschließlich synthetischer Schmieröle und Mischungen von Pflanzenölen, beschrieben. Die Verfahren sind ebenfalls anwendbar auf Mineralölerzeugnisse und synthetische Schmierstoffe, die in geeigneter Weise aus anderen Materialien, z.B. aus Abfallstoffen, gewonnen werden. Beide Berechnungsverfahren haben unterschiedliche Stärken und Schwächen, welche in den einzelnen Abschnitten beschrieben sind und die vor Anwendung in einem bestimmten Fall zu berücksichtigen sind. Die richtige Anwendung entweder des Verfahrens A oder des Verfahrens B muss sorgfältig ausgewählt werden, bevor man es in einer bestimmten Situation einsetzt.