ISO 11337:2004
ISO 11337:2004


ISO 11337:2004 specifies a method for determining epsilon-caprolactam and omega-laurolactam in polyamides by gas chromatography. It is suitable particularly for the determination of epsilon-caprolactam in polyamide 6 and omega-laurolactam in polyamide 12. Bearing in mind that gas chromatography offers a wide range of possible conditions, the method specified is that shown to have been suitable in practice.

Two variants of the basic method are specified:

  1. Method A is an extraction method with boiling methanol, and the extract is injected into a gas chromatograph.
  2. Method B is a method using a solvent, and the solution is injected into a gas chromatograph.

Method A is suitable for the determination of epsilon-caprolactam and method B for epsilon-caprolactam and omega-laurolactam.

General information 

  •  :  Withdrawn
     : 2004-05
  •  : 1
     : 14
  •  : ISO/TC 61/SC 5 Physical-chemical properties
  •  :
    83.080.20 Thermoplastic materials

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