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%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2003年第6期342-343,348,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
