标准摘要
[中文适用范围]： 本国际标准规定了一种以铂钴单位 (Pt-Co 单位) 为单位评估清澈液体颜色的分光光度法。它适用于颜色特征与附录 A 中规定的铂钴色标相似的清澈液体。对于颜色比 Pt-Co 原液更浓的产品，适用 ISO 4630 中规定的方法。分光光度法提供了一种比人眼目测样品比较更精确的 Pt-Co 颜色测量方法。注：此处使用的术语“Pt-Co 颜色”优于术语“Hazen 颜色”和“APHA 颜色”。 [外文原描述]： ISO 6271:2015 specifies a spectrophotometric method for estimating the colour of clear liquids in terms of platinum-cobalt units (Pt-Co units). It is applicable to clear liquids having a colour characteristic similar to those of the platinum-cobalt colour scale specified in Annex A. For products with colours more intense than the Pt-Co stock solution the method specified in ISO 4630 applies. The spectrophotometric method provides a more precise way of measuring Pt-Co colour than a visual sample comparison by human eyes. NOTE The term "Pt-Co colour" used here is preferred over the terms "Hazen colour" and "APHA colour".
英文名称Clear liquids — Estimation of colour by the platinum-cobalt colour scale