摘要
经过实验探索,发现一定条件下配制的硫代硫酸钠滴定液,配制后放置5天过滤标定,在4℃保存,与存放6个月内标定浓度基本一致,6个月内无需复标。标定过程中加酸后的放置时间,放置5 min与放置10 min标定结果基本一致,可将加酸后的放置的时间改进为5 min。
Through experiment, we found that the sodium thiosulfate titration solution prepared under certain conditions when filtrated and Calibratd after five days, preserved at 4 ℃, the calibration concentration keep the same and does not require to be re-marked within six months, we also/bund that the titration solution added Acid in the calibration process can keep the calibration results identical with the storage time 5 minutes and 10 minutes. So the storage time of Storage time .
出处
《广东化工》
CAS
2012年第16期68-68,72,共2页
Guangdong Chemical Industry
关键词
硫代硫酸钠
实验条件改进
存放时间
放置时间
sodiumthiosulfate
improvement of experimental conditions： preservation time
the titration solution added Acid can be improved to 5 minutes.
