摘要
介绍了一种测定对苯醌中微量氯的方法 ,以碱性H2 O2 溶液为吸收液 ,用HNO3溶液调节 pH值为 7～ 9.5 ,以K2 CrO4溶液为指示剂 ,用AgNO3 标准溶液滴定 ,回收率在 97%～10 1% ,相对标准偏差为 1.8%～ 4 .7%。
A method for determination of microamount chlorine in p-benzoquinone is proposed. With alkaline H_2O_2 solution as absorption liquid, the solution containing p-benzoquinone sample was adjusted to pH 7～9.5 by nitric acid, and then titrated by standard silver nitrate solution with potassium chromate as indicator. The recovery efficiency is in the range of 97 %～101 %, and the relative standard deviation is 1.8 %～4.7 % .
出处
《当代化工》
CAS
2004年第5期301-304,共4页
Contemporary Chemical Industry
基金
江苏省高校自然科学研究项目 (0 2KJB15 0 0 0 4)
关键词
对苯醌
微量氯
测定
氧瓶燃烧法
p-Benzoquinone
microamount chlorine
titrate
oxygen-flask combustion method
