宋燕婷,胡会超,柴欣生.顶空气相色谱法检测纸浆中羰基含量的研究[J].中国造纸,2014,33(10):36-39 本文二维码信息
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顶空气相色谱法检测纸浆中羰基含量的研究
Determination of Carbonyl Groups of Pulp by Headspace Gas Chromatography
收稿日期：  
DOI：10.11980/j.issn.0254-508X.2014.10.007
关键词:  顶空气相色谱  羰基基团  纸浆  硼氢化钠  氢气
Key Words:headspace gas chromatograph  carbonyl groups  pulp  sodium borohydride  hydrogen
基金项目:教育部博士基金(20110172110026)。
作者单位
宋燕婷1 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 
胡会超2 2.福建农林大学,福建福州,350002 
柴欣生1,3，* 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；3.国家纸制品质量监督检验中心,广东东莞,523080 
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摘要:研究了一种顶空气相色谱法检测纸浆中羰基含量的方法。该方法以一定量的NaBH4与纸浆中的羰基基团在碱性介质(0.1 mol/L NaOH)中发生反应，样品瓶中未参与反应的NaBH4在加入H2SO4后全部转化为H2，以气相色谱中的热导检测器检测H2含量，从而间接检测出纸浆中羰基基团的含量。该方法稳定、灵敏、精确，且重现性相对标准偏差小于1.0%，灵敏度检测最低定量检测限为1.26 μmol，回收率范围为97%~105%。
Abstract:A headspace gas chromatographic (HS-GC) method has been developed for the determination of carbonyl groups in pulp. The method is based on the reaction between sodium borohydride and carbonyl groups of pulp at an alkaline medium (0.1 mol/L NaOH), and the excess sodium borohydride is quantitatively converted to hydrogen after the solution is acidified by sulfuric acid. The released hydrogen is then determined by GC equipped with a thermal conductivity detector. Thus, the carbonyl groups of pulp can be indirectly quantified. The relative standard deviations in the reproducibility test are within 1.0%, and a sensitivity whose limit of quantification (LOQ) is 1.26 μmol, and a demonstrated recovery ranging from 97% to 105%. The present method is simple, rapid, and practical.
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