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Determination of Carbonyl Groups of Pulp by Headspace Gas Chromatography
  
DOI：10.11980/j.issn.0254-508X.2014.10.007
Key Words:headspace gas chromatograph  carbonyl groups  pulp  sodium borohydride  hydrogen
Fund Project:教育部博士基金(20110172110026)。
Author NameAffiliation
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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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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