Uncertainty evaluation on the concentration of Potassium dichromate volumetric solution

Objective: To established a method for uncertainty evaluation on the concentration of volumetric solution. Methods: The calculation formula of uncertainty was deduced in the procedure of preparation of the solution. Results: Each components of uncertainty was calculated by analyzing the various variable parameters in the procedures．The combined uncertainty was then finally obtained by synthesizing the uncertainties of various component variables.Conclusion: The mathematic model of uncertainty measurement established in this paper is reasonable and reliable.