摘要
利用浓硫酸的高沸点及氯化氢挥发性的特点,以H2SO4∶AgCl(重量比)=3 5∶1,在加热的条件下制备硫酸银,反应时间约需半小时;以硫酸银在Ag2SO4∶Cl-(重量比)≥40∶1的条件下掩蔽氯离子干扰,其误差与标准法相比小于3%。
Taking advantage of the volatile characteristic of HCl and the high boiling point of H_2SO_4, we produced silver sulphate. Under the condition of H_2SO_4∶AgCl(wt.)> 3.5∶1,heating the mixture .The results showed that the react time is short, only about a half of an hour; meanwhile, when Ag_2SO_4∶Cl^-(wt.)>40∶1, we can eliminated the interfrence of Cl^- with Ag_2SO_4 as a masking agent .Compared with standard method,its relative standard deviation was less than 3%.
出处
《中国环境监测》
CAS
CSCD
北大核心
2004年第6期23-24,30,共3页
Environmental Monitoring in China
关键词
COD分析
硫酸银
掩蔽剂
COD analysis
silver sulphate
masking agent
