Estimation of Uncertainty of Air Buoyancy Correction for Establishment of Primary Mass Standards


Abstract: The most accurate value of air density is obtained by a calculation based on the equation using measured atmospheric parameters approved by the International Committee for Weights and Measures in 1981. When a 1-kg steel weight was calibrated against the prototype kilogram using the international expression for determining the density of air, experimental results showed that the estimated uncertainty of the air density was $1.45x10^{-4}$ mg.$cm^{-3}$ and the uncertainty of air buoyancy was 11.3 $\mu$g.

Keywords: air density, air buoyancy correction, primary mass standard.

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