1 Scope
This document specifies a method for determining ε‑caprolactam and ω‑laurolactam in
polyamides by gas chromatography. It is applicable particularly to the determination
of ε‑caprolactam in polyamide 6 and ω‑laurolactam in polyamide 12.
Two variants of the basic method are specified.
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— Method A is an extraction method with boiling methanol, and the extract is injected into a gas chromatograph.
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— Method B is a method using a solvent, and the solution is injected into a gas chromatograph.