Author(s): CHEN Juan, SHEN Jie, ZHU Jing, WANG Min
Pages: 62-64
Year: 2014 Issue:  2
Journal: Journal of Huaihai Institute of Technology(Natural Sciences Edition)
Keyword:  disodium edetate; relative deviation; expiry period; validation;
Abstract: The concentration variation of disodium edetate titrating solution,which is commonly used in laboratories,was evaluated to determine its expiry period under storage and common use conditions.Relative deviation of zero-to-five-month sample concentration was evaluated through concentration titration,and the expiry period of the solution was determined to be three months. This experiment provides an accurate and reliable validation method for expiry period of titrating solution which can satisfy experiment requirements.