采用顶空气相色谱法测定回收白水中的微粘性物质。
Determination of microstickies in recycled whitewater by headspace gas chromatography.
作者信息
Chai X-S, Samp J C, Yang Q F, Song H N, Zhang D C, Zhu J Y
机构信息
School of Light Industrial and Food Engineering, Guangxi University, Nanning, Guangxi 530004, China.
出版信息
J Chromatogr A. 2006 Mar 3;1108(1):14-9. doi: 10.1016/j.chroma.2005.12.108.
This study proposed a novel headspace gas chromatographic (HS-GC) method for determination of adhesive contaminants (microstickies) in recycled whitewater, a fiber containing process stream, in the paper mill. It is based on the adsorption behavior of toluene (as a tracer) on the hydrophobic surface of microstickies, which affects the apparent vapor-liquid equilibration partitioning of toluene. It was found that the equilibrium concentration of toluene in the vapor phase is inversely proportional to the apparent effective surface area of microstickies that remain in the corresponding solution. Thus, the amount of microsticky materials in the recycled whitewater can be quantified by HS-GC via indirect measurement of the toluene content in the vapor phase of the sample without any pretreatment. The presented method is simple, rapid and automated.
本研究提出了一种新颖的顶空气相色谱（HS-GC）方法，用于测定造纸厂中回收白水中的粘性污染物（微粘性物质），回收白水是一种含纤维的工艺流。该方法基于甲苯（作为示踪剂）在微粘性物质疏水表面的吸附行为，这会影响甲苯的表观气液平衡分配。研究发现，气相中甲苯的平衡浓度与相应溶液中残留的微粘性物质的表观有效表面积成反比。因此，通过对样品气相中甲苯含量的间接测量，无需任何预处理，即可利用HS-GC对回收白水中的微粘性物质含量进行定量。所提出的方法简单、快速且自动化。
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