电位滴定法测岩心中水溶性有机酸的含量  

Potentiometric Titration Measuring Water-soluble Organic Acids in Rock Core

作　　者：张红娟[1] 张在龙[1] 庞志华[1] 宋明芝[1] 张翠侦[1] 

机构地区：[1]中国石油大学化学化工学院,青岛266555

出　　处：《科学技术与工程》2010年第7期1744-1746,共3页Science Technology and Engineering

基　　金：山东省自然科学基金(ZR2009EM011)资助

摘　　要：采用返滴定方式,电位滴定测定了胜利油田部分岩心中的水溶性有机酸含量,考察颗粒大小、萃取时间、滴定方式等因素对测定结果的影响。实验结果表明,岩心颗粒越小,萃取率越高,萃取时间对有机酸的测定结果有一定影响,加热煮沸60min即可达到萃取平衡。与直接滴定法相比较,电位返滴定法测定具有萃取率高、终点易观察、结果重复性好等优点。A convenient and rapid method was developed for the determination of water-soluble organic acids in rock core of Shengli Oilfield by back potential titration. The influence of particle size, extraction time and titration pattern on the extraction of the organic acids was investigated. The better experimental conditions were obtained. The diameter of rock core is 160 meshes, and extraction time is sixty minutes. The back potential titration method has many advantages over the direct-titration method. It has high extraction rate and precision, and the titration point is easy to be found.

关 键 词：岩心 有机酸 电位滴定法 返滴定法 

分 类 号：O656.35[理学—分析化学]