This document specifies a method for determining the total content of the following cyclosiloxanes in chemicals for the leather tanning industry:

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octamethylcyclotetrasiloxane (D4);

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decamethylcyclopentasiloxane (D5);

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dodecamethylcyclohexasiloxane (D6);

This method requires the use of gas chromatography (GC) equipped with a single quadrupole mass spectrometer (MS) to identify and quantify the cyclosiloxanes.