紫外可见光谱测定马尾松纸浆树脂中甘油三酯含量  

Measurement of Triglyceride Content of Resin in Masson Pulp by UV Spectral Method

作　　者：石海强[1] 何北海[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广州510640

出　　处：《中国科技论文》2006年第1期68-72,共5页China Sciencepaper

基　　金：教育部科学技术重点项目"造纸清洁生产循环流中非过程元素的富集与调控机制研究";教育部高等学校博士点学科点专项科研基金(20050561006)资助项目

摘　　要：用紫外光谱法测定马尾松 TMP 浆和酸性亚硫酸盐浆正己烷抽出物中甘油三酯的含量,探讨了三油酸甘油酯标准物与纸浆树脂的紫外吸光谱图特征与特征峰位置以及及测试时间对吸光度值的影响。结果表明在本实验试剂用量与浓度范围内,三油酸甘油酯在412nm 的吸光度与浓度成线性关系,线性相关系数为0.971;吸光度随测试时间呈线性降低关系,相关系数为0.9902。再现性实验回收率98%-104%,精确度为1.27-4.03%。利用该方法测定了纸浆与酶处理后纸浆抽提物中甘油三酯的含量,评价了酶处理纸浆降解甘油酯的效果。结果表明马尾松 TMP 与酸性亚硫酸盐浆中甘油三酯含量较高,约占总抽提物的50%。酶处理后 TMP 浆与酸性亚硫酸盐浆中甘油三酯降解率分别达到46.31和35.55%。Pitch deposite is one of the most troublesome problems for the paper mills in South China that use the Masson pine as a raw material to make paper.The triglyceride has been identified as the main compositions accounting for pitch problem.In order to set down on effective pitch control scheme,the triglyceride content in papermaking process must be measured quantitatively.A method to measure the content of triglyceride in masson wood pulp was developed based on UV spectrophotometer in this work.The UV spectrogram and characteristic peak location of standard glycerol trioleate were discussed as well as the effect of measuring time to absorbency. The results showed that at 412nm,the relation between absorbency and consistency of glycerol trioleate was linear and the pertinent coefficient reached 0.971 under the range of reagent dosage and consistency in this experiment. The absorbency was decreased linearly with measuring time and the pertinent coefficient reached 0.99.The results of reproductive experiment showed that the recoveries were 98-104% and the accuracy was 1.27-4.03%.With this method,the content of triglyceride in hexane extractive of masson TMP and acidic SP were measured respectively.In this work,the degradative effect of triglyceride before and after enzyme treatment for masson wood pulp was also evaluated.The results showed that the triglyceride content was relatively high,about 50% both in the total extractive of Masson TMP and acidic SP.After enzyme treatment,the content of triglyceride in masson TMP and acidic SP was reduced by 46.31% and 35.55% respectively.

关 键 词：紫外光谱 树脂控制 甘油三酯 显色 酶 测量方法 

分 类 号：TS77[轻工技术与工程—制浆造纸工程]