电位滴定法测定间羟基苯甲醛合成中残留的间甲酚  

POTENTIOMETRIC DETERMINATION OF UNREACTED m-CRESOL IN THE SYNTHESIS OF m-HYDROXY-BENZALDEHYDE

作　　者：刘俊峰[1] 陈安国[1] 田云丽[1] 

机构地区：[1]湘潭工学院化工系,湘潭411201

出　　处：《理化检验（化学分册）》2003年第6期342-343,348,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用直接电位滴定法配合亚硫酸氢钠加成法测定间羟基苯甲醛合成中残留间甲酚的含量 ,平行测定结果误差不大于 0 .2 % ,平均偏差在 0 .1%以下 ,方法简便易行 。Sum of contents of m cresol and m hydroxy benzaldehyde (A) was determined by titration with HCl titrating solution potentiometrically, and the content of m hydroxy benzaldehyde (B) was determined by titration of its addition product with standard iodine solution using starch as indicator. Unreacted m cresol in the reaction liquor was found by subtraction of value B from value A. As shown by the results obtained in the analysis of samples from 8 batches of the reaction liquor, the absolute deviations of results of two parallel determinations were less than 0.2%, and the RSD′s obtained were less than 0.1%.

关 键 词：电位滴定法 测定 间羟基苯甲醛 间甲酚 残留量 直接催化合成 香料 

分 类 号：TQ655[化学工程—精细化工]