# ISO 15033:2007 — Withdrawn and superseded ISO standards For ISO 15033:2007, item title is Plastics — Determination of caprolactam and its cyclic and linear oligomers by HPLC; status code is 9599; successor is ISO 15033:2018; withdrawn / published date is 2007-03-06, recorded from its source on 2026-08-05. - **Identifier:** ISO 15033:2007 _(verified: appears in the quote below)_ - **Item title:** Plastics — Determination of caprolactam and its cyclic and linear oligomers by HPLC _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 15033:2018 - **Withdrawn / published date:** 2007-03-06 _(verified: appears in the quote below)_ ## What the source says > 40095,IS,,ISO 15033:2007,Plastics — Determination of caprolactam and its cyclic and linear oligomers by HPLC,Plastiques — Détermination du caprolactame et de ses oligomères cycliques et linéaires par CLHP,2007-03-06,2,['83.080.01'],ISO/TC 61/SC 5,9599,[26269],[70036],['en'],11,"
ISO 15033:2007 describes an HPLC (high-performance liquid chromatography) method for determining the concentrations of cyclic oligomers of caprolactam, from 0,01 % by mass upwards, and linear oligomers of caprolactam, from 5 mg/kg upwards, both up to and including the hexamer of caprolactam (n = 6), in samples of polyamide 6, caprolactam and mixtures of rearrangement products in water.
" ## Source - https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv Last verified: 2026-08-05. Review by: 2027-02-01. Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).