Abstract：To propose that highpurity water which producted by microfilter,recerse osmosis and electrodeionzation technology is used as calibration medium and as a substitute for tapwaterTo correcte the density of water for factors as the water isotopic abundance，teperature gradient and dissolved air，the isotopic abundance，teperature gradient and atmosphere environmental parameters (t,p,RH) are measuredThe water quality report shows that the water be producted is in accord with the GB/T 11446.1 EW-I standardThe standard measurement uncertainty of water density is reduced to 7×10-3kg/m3,and the measurement uncertainty of the volume primary standard Urel is less than 3×10-5（k=3）.
郭立功,刘子勇,王金涛,佟林,暴雪松. 检定介质制备与静力称重法容量测量不确定度研究[J]. 计量学报, 2013, 34(6): 537-540.
GUO Li-gong,LIU Zi-yong,WANG Jin-tao,Tong Lin,Bao Xu-song. Study on Uncertainty of Volume Measerment by Hydrostatic Weighing Method and Production of Calibration Medium. Acta Metrologica Sinica, 2013, 34(6): 537-540.
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2013, Vol. 34 
