酸碱电位滴定法测定生物油中总酸含量  

Determination of total acids in bio-oil by potentiometric acid-base titration

作　　者：崔洪友[1] 王景华[1] 魏书芹[1] 马成亮[1] 禚淑萍[1] 王丽红[2] 李志合[2] 易维明[2] 

机构地区：[1]山东理工大学化工学院,山东淄博255091 [2]山东理工大学山东省清洁能源工程技术中心,山东淄博255091

出　　处：《可再生能源》2010年第6期36-39,44,共5页Renewable Energy Resources

基　　金：国家"863"项目(2009AA05Z401);山东省自然科学基金(ZR2009BL023)

摘　　要：建立了一种快速测定生物油总酸含量的滴定方法。试验考察了生物油中醛、酮、酚等对分析结果的影响。结果表明,生物油的糠醛、乙酰丙酮、2-甲氧基苯酚等物质不会对滴定分析产生干扰作用。加标试验表明,乙酸的回收率为98.32%～101.9%,与GC-MS法相比,滴定法分析生物油的总酸含量更准确。该法用于生物油总酸含量测定时,具有很高的准确度,相对标准偏差为1.03%,可简便、灵敏地用于生物油总酸度的测定。A method for quantitative determination of the total acids in bio-oil is established based on a combination of acid-base titration and potentiometric titration.Ethanal,acetylacetone and 2-methoxyphenol have little interference effect on the determination accuracy.The addition experiment shows that the recoveries of acetic acid were among 98.32%～101.9%.When the method is employed to determine the total acids amount in bio-oil,the relative standard deviation is about 1.03%.Compared with GC-MS,the analysis results of acids in bio-oil by titration is more accurate.Therefore,the established method is simple,sensitive and accurate for determining the total amount of acids in bio-oil.

关 键 词：酸碱电位滴定 生物油 酸度 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.2[农业科学—农业机械化工程]