Li Hailong, Zhan Huaiyu, Fu Shiyu, Liu Mengru, Chai Xin-Sheng
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China.
J Chromatogr A. 2007 Dec 14;1175(1):133-6. doi: 10.1016/j.chroma.2007.10.040. Epub 2007 Oct 22.
This paper reported a full evaporation headspace gas chromatographic (GC) technique for determination of methanol content in black liquors (pulping spent liquor). In this method, a very small volume (10-20 microL) of liquor sample is introduced into a headspace sample vial (20 mL) and heated up to a temperature of 105 degrees C. A near-complete mass transfer of methanol from the liquid phase to vapor phase (headspace), i.e., a full evaporation, can be achieved within 3 min. The methanol in the headspace of the vial is then measured by GC. The present method is simple, rapid and accurate.
本文报道了一种全蒸发顶空气相色谱（GC）技术，用于测定黑液（制浆废液）中的甲醇含量。在该方法中，将非常少量（10 - 20微升）的液体样品引入顶空进样瓶（20毫升）中，并加热至105摄氏度。甲醇可在3分钟内从液相几乎完全转移至气相（顶空），即实现全蒸发。然后通过气相色谱法测定进样瓶顶空中的甲醇。本方法简单、快速且准确。
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