一种基于COD法测定溶解浆反应性的新方法

IF 0.6 4区 农林科学 Q4 MATERIALS SCIENCE, PAPER & WOOD Tappi Journal Pub Date : 2019-06-01 DOI:10.32964/TJ18.5.279
Chen Gong, Li Yanzhao, Niu Jianping, Yang Xiaobo, T. Chao
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引用次数: 0

摘要

讨论了一种根据水的化学需氧量(COD)测定溶解浆反应性的新方法。首先,对溶解浆样品进行丝光和黄原化处理,以获得溶解的纤维素部分。接下来,用COD程序中应用的测试溶液消化级分。最后,通过紫外-可见分光光度法(UV-Vis)对所得液体进行快速测试。通过定量Cr3+在600nm波长下的吸光度,间接计算了溶解纸浆的反应性。通过这种新型COD方法测量的结果与最公认的Fock测试结果具有良好的相关性,相对差异小于10%。同时,与Fock试验相比,这种新开发的COD方法所需的程序耗时较少。
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A novel approach for determining the reactivity of dissolving pulp based on the COD method
A novel approach for determining the reactivity of dissolving pulp according to the chemical oxygen demand (COD) of water has been discussed. First, a sample of dissolving pulp was subjected to mercerization and xanthation in order to obtain dissolved cellulose fractions. Next, the fractions were digested with a testing solution as applied in COD procedures. Finally, the resulting liquid was rapidly tested by ultraviolet-visible spectrophotometry (UV-Vis). By quantifying the absorbance of Cr3+ at a wavelength of 600 nm, the reactivity of dissolving pulp was indirectly calculated. The results measured by this novel COD method correlated well with the most accepted Fock test results with less than 10% relative difference. Meanwhile, this newly developed COD method required less time-consuming procedures as compared to the Fock test.
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来源期刊
Tappi Journal
Tappi Journal 工程技术-材料科学:纸与木材
CiteScore
1.30
自引率
16.70%
发文量
59
审稿时长
6-12 weeks
期刊介绍: An internationally recognized technical publication for over 60 years, TAPPI Journal (TJ) publishes the latest and most relevant research on the forest products and related industries. A stringent peer-review process and distinguished editorial board of academic and industry experts set TAPPI Journal apart as a reliable source for impactful basic and applied research and technical reviews. Available at no charge to TAPPI members, each issue of TAPPI Journal features research in pulp, paper, packaging, tissue, nonwovens, converting, bioenergy, nanotechnology or other innovative cellulosic-based products and technologies. Publishing in TAPPI Journal delivers your research to a global audience of colleagues, peers and employers.
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