一种快速测定草类原料制浆黑液中硅含量的新方法  

Rapid Determination of Silicon Content in Black Liquor of Straw Fibrous Material

作　　者：李海龙[1] 柴欣生[1] 詹怀宇[1] 刘梦茹[2] 付时雨[1] 孙立金[3] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]华南理工大学工业技术研究总院,广东广州510640 [3]广西大学轻工与食品工程学院,广西南宁530004

出　　处：《光谱学与光谱分析》2012年第6期1681-1684,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(21006034;31100438);中央高校基本科研业务费专项(2011ZM0096);制浆造纸工程国家重点实验室开放基金项目(201154)资助

摘　　要：应用基于α-型硅钼黄显色的分光光度法进行草类原料蒸煮黑液中硅含量的测定。测定波长360nm,pH 4.0,时间10min。实验中采用过氧化氢-硝酸消解法消除样品中木素成分对光度检测的干扰。研究表明:该方法的相对偏差及回收率分别为0.9%和99.0%～102%。该方法具有操作简便、快速,稳定性好,准确性高,试剂干扰少的优点,可用于黑液中高硅含量的日常快速分析。The present paper reports a novel method for the determination of silicon content in straw fibrous material black liquor based on α-Si—Mo heteropoly acid spectrophotometry.The selected conditions were as follows： detection wavelength 360 nm,pH 4.0,and reaction time 10 min.It was found that the acidic soluble lignin in the sample liquor was the major interference species in the silicon content determination.The interference of acidic soluble lignin can be eliminated by hydrogen peroxide-nitric acid digestion method.The present method is not only simple,rapid,stable and less interferential,but also of good measurement precision and accuracy,with the relative standard deviations of 0.9%,and recoveries of 99.0%～102%.It is suitable for use in high silicon content of black liquor routine rapid analyses.

关 键 词：α-型硅钼黄 分光光度法 黑液 硅含量 

分 类 号：O613.7[理学—无机化学] O657.3[理学—化学]