ISO 6588-1:2005 纸、纸板和纸浆 水萃取物的pH值测定-第1部份： 冷萃取

标准编号：ISO 6588-1:2005

中文名称：纸、纸板和纸浆 水萃取物的pH值测定-第1部份： 冷萃取

英文名称：Paper, board and pulps — Determination of pH of aqueous extracts — Part 1: Cold extraction

发布日期：2005-05

标准范围

This part of ISO 6588 specifies a method for the determination of the pH-value defined by the electrolytes extractable by cold water from a sample of paper, board or pulp.This part of ISO 6588 is applicable to all types of paper, board and pulp.As the quantity of extractable ionic material approaches zero, as in the case of highly purified pulps, the precision of the method becomes poor because of the difficulties encountered in making pH measurements on water containing little electrolytic material.Since the extraction in this part of ISO 6588 is performed with distilled or deionised water, the pH-value measured will sometimes be different (e.g. for fully bleached pulp) from the pH-value measured under mill process conditions in which various types of process waters, e.g. chemically treated river water containing electrolytes, are used.ISO 6588-2 differs from this this part of ISO 6588 only as regards the extraction conditions. No general guidance can be given as to which of the two procedures (hot or cold) is best suited in a particular situation.For cellulosic papers used for electrical purposes, the method used should be that given in IEC 60554-2 (see [4] in the Bibliography).

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