A new apparatus for canning radiation dosimeter solution （Patent No. ZL200320174.9） has been developed. Experiments on the background stability and dispersity showed that the canning mode was a main factor making the background values dispersive. The uncertainties of the absorbed dose were comparatively estimated for the two modes. The dose verifications for different canning modes and under different environmental conditions indicate that the total uncertainty of the absorbed dose for this canning apparatus is less than 1 %.