ISO 6588-2-2005 纸、纸板和纸浆.水提物pH值的测定.第2部分_热萃取.pdf

标准号：ISO 6588-2-2005
实施状态：作废
中文名称：纸、纸板和纸浆.水提物pH值的测定.第2部分:热萃取
英文名称：Paper, board and pulps - Determination of pH of aqueous extracts - Part 2: Hot extraction
发布日期：2005-05
被替代标准：ISO 6588-2-2012
代替标准：ISO 6588-1981;ISO/FDIS 6588-2-2005
采用标准：BS ISO 6588-2-2005,IDT
起草单位：ISO/TC 6
标准简介：This part of ISO 6588 specifies a method for the determination of the pH-value defined by the electrolytes extractable by hot water from a sample of paper, board or pulp.
This part of ISO 6588 is applicable to all kinds 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. 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 6588-1 differs from 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).
文件格式：PDF
文件大小：161.50KB
文件页数：14
（以上信息更新时间为：2019-11-22）



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