紫外-可见光谱法测定黑液中木素含量  

Determination of lignin content in black liquor from straw pulp by UV-visible spectrometry method

作　　者：卜令习[1] 鲁杰[1] 杨瑞丰[1] 殷腾飞[1] 周景辉[1] 

机构地区：[1]大连工业大学辽宁省制浆造纸工程重点实验室,辽宁大连116034

出　　处：《化工学报》2010年第12期3266-3271,共6页CIESC Journal

基　　金：辽宁省教育厅项目(2008079;2009S012)~~

摘　　要：通过对3,5-二硝基水杨酸(DNS)及草浆黑液木素溶液紫外-可见特定波长区域光谱图的研究,建立了一种快速、简便、准确的草浆黑液中木素含量测定方法。研究结果表明,草浆黑液木素在520nm处DNS溶液吸光度值与木素溶解量二者具有较高的线性关系。该方法在测量时可以排除草浆黑液中还原糖及亚硫酸钠的干扰。不但能测定碱法草浆黑液中木素含量,还可以测定碱性亚硫酸盐法草浆黑液中木素含量。采用该方法测定草浆黑液中木素相对含量是准确可靠的。A fast,simple and accurate method for determination of lignin content in black liquor from straw pulp（BLSP）was proposed,based on an analysis for the typical absorption of 3,5-dinitrosalicylic acid（DNS） as well as black liquor in a fixed UV-visible wavelength region.The analysis indicated that,at wavelength 520 nm,a high linear relationship was found between the contents of lignin dissolved in BLSP and absorbance values of DNS.The interference of glucose and Na2SO3 in black liquor from straw pulp on measuring value could be eliminated.So,this method proposed can be used not only for the accurate determination of lignin content in BLSP but also for lignin content determination in BLSP that produced from basic Na2SO3 process.

关 键 词：木素含量 黑液 紫外-可见光谱法 3 5-二硝基水杨酸 

分 类 号：TS79[轻工技术与工程—制浆造纸工程]