本国际标准规定了测定工业己内酰胺高锰酸盐吸收值的光谱测定方法。高锰酸盐吸收值是己内酰胺中可氧化杂质的测量值，在固定条件下，在缓冲中性水介质中测定。 该方法适用于碱性或酸性低于0.50 mmol/kg且PAN值高达35的纯化己内酰胺（以及己内酰胺纯化过程中的中间体）。

This International Standard specifies a spectrometric method for the determination of the permanganate absorption number of caprolactam for industrial use. The permanganate absorption number is a measure of the oxidizable impurities in caprolactam, determined in a buffered neutral aqueous medium under fixed conditions. The method is applicable to purified caprolactam (and intermediates in the caprolactam purification process) with an alkalinity or acidity lower than 0,50 mmol/kg and a PAN value of up to 35.