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A New Method for the Analysis of Soluble and Insoluble Oxalate in Pulp and Paper Matrices

机译:纸浆和造纸基质中可溶性和不溶性草酸盐分析的新方法

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摘要

A novel method has been developed for determining soluble and insoluble forms of oxalate in pulp and paper samples by ion chromatography. Methanesulphonic acid is used to dissolve insoluble oxalate, and total oxalate is then determined by ion chromatography with suppressed conductivity detection. Soluble oxalate is determined directly by ion chromatography, without prior chemical treatment. Insoluble oxalate is obtained by difference. The method was applied to samples of pulp, process liquors, filtrates, and scale deposits from kraft mills. In kraft mills, considerably higher levels of oxalate were found in the Eop samples compared to those in the brownstock and D_0 samples. In both brownstock and Eop samples, oxalate was mainly present in soluble form, whereas the D_0-stage contained relatively higher levels of insoluble oxalate.
机译:已经开发出一种新的方法,用于通过离子色谱法测定纸浆和纸张样品中草酸盐的可溶和不溶形式。使用甲磺酸溶解不溶性草酸盐,然后通过离子色谱法测定电导率,从而测定草酸总量。草酸根可通过离子色谱法直接测定,无需事先化学处理。通过溶解获得不溶性草酸盐。该方法适用于纸浆厂,制浆厂,滤液和牛皮纸厂的水垢沉积物的样品。与牛皮纸和D_0样品相比,牛皮纸厂在Eop样品中发现的草酸盐含量要高得多。在褐煤和Eop样品中,草酸盐主要以可溶性形式存在,而D_0级所含的不溶性草酸盐含量相对较高。

著录项

  • 来源
    《Journal of Wood Chemistry and Technology》 |2014年第1期|55-66|共12页
  • 作者单位

    Forestry and Forest Products Research Centre, University of KwaZulu-Natal/CSIR Natural Resources and the Environment, P. O. Box 17001, Congella, Durban 4013, South Africa Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban, South Africa;

    Department of Chemistry and Industrial Chemistry, Ekiti State University, Ado-Ekiti, Nigeria Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban, South Africa;

    Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban, South Africa;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Oxalate; soluble; insoluble; methanesulphonic acid; ion chromatography; pulp and paper;

    机译:草酸盐;易溶;不溶甲磺酸离子色谱纸浆和造纸;

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