Rapid Determination of Silicon Content in Black Liquor of Straw Fibrous Material
LI Hai-long1, CHAI Xin-sheng1*, ZHAN Huai-yu1, LIU Meng-ru2, FU Shi-yu1, SUN Li-jin3
1. State Key Lab of Pulp & Paper Engineering，South China University of Technology，Guangzhou 510640，China 2. Industrial Technology Research Institute，South China University of Technology，Guangzhou 510640，China 3. School of Light Industrial and Food Engineering，Guangxi University，Nanning 530004，China
Abstract：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.
李海龙1，柴欣生1*，詹怀宇1，刘梦茹2，付时雨1，孙立金3 . 一种快速测定草类原料制浆黑液中硅含量的新方法 [J]. 光谱学与光谱分析, 2012, 32(06): 1681-1684.
LI Hai-long1, CHAI Xin-sheng1*, ZHAN Huai-yu1, LIU Meng-ru2, FU Shi-yu1, SUN Li-jin3 . Rapid Determination of Silicon Content in Black Liquor of Straw Fibrous Material . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(06): 1681-1684.
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