标准摘要
[中文适用范围]： 本文件描述了一种高效液相色谱 (HPLC) 方法，用于测定己内酰胺环状低聚物（按质量计 0.01% 以上）和己内酰胺线性低聚物（5 mg/kg 以上）的浓度，最高可达并包括聚酰胺 6、己内酰胺和重排产物在水中的混合物样品中的己内酰胺六聚体 (n = 6)。 第二种方法明显更快，用于测定己内酰胺及其环状二聚体，该方法基于与第一种方法相同的原理并使用相同的设备。 [外文原描述]： This document describes a high-performance liquid chromatography (HPLC) 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. A second, significantly faster, HPLC method is included for determination of caprolactam and its cyclic dimer, based on the same principle and using the same equipment as the first method.
英文名称Plastics — Determination of caprolactam and its cyclic and linear oligomers by HPLC