ISO 6588-1-2005 纸、纸板和纸浆.水提物pH值的测定.第1部分:冷萃取

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                   【英文标准名称】:     Paper, board and pulps - Determination of pH of aqueous extracts - Part 1: Cold extraction            【原文标准名称】:     纸、纸板和纸浆.水提物pH值的测定.第1部分:冷萃取            【标准号】:     ISO 6588-1-2005            【标准状态】:     现行            【国别】:     国际            【发布日期】:     2005-05    【实施或试行日期】: 【发布单位】: 国际标准化组织(ISO)【起草单位】: ISO/TC 6【标准类型】: ()【标准水平】: ()【中文主题词】: 萃取;纸;冷萃取;纸板;纸浆;纸浆;pH值;测定;试验【英文主题词】: Board (paper);Cold extraction;Determination;Extractionaperaper pulp;pHulp;Testing;Tests【摘要】: 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).【中国标准分类号】: Y30【国际标准分类号】: 85_040;85_060【页数】: 6P;A4【正文语种】: 英语