Characterization and Uncertainty Evaluation on Reference Material of Available Iodine in Disinfectants

Objectives To conduct the characterization and uncertainty evaluation on reference material of available iodine in developed disinfectants.

Methods After experiments of homogeneity and stability, multiple laboratories were adopted to carry out the characterization and uncertainty evaluation on reference materials to complete the calculation of uncertainty and expansive uncertainty of synthetic criterion, and provide the final characteristic value of available iodine reference materials.

Results The characteristic value of available iodine reference material in disinfectants is expressed as (0.508±0.004)%(k=2).

Conclusions The available iodine reference material has relatively good homogeneity and stability. The result of characterization is accordance with the requirement of reference material, which could be used on quality control and capability validation of available iodine determination in disinfectants.