May 15, 2013 · Each vial was labeled and a light layer of fluorinated grease (Dupont TM Krytox® LVP, Sigma-Aldrich) was applied to the lip of the vial to aid in sealing. The empty 2 mL vial was tared on the balance, approximately 1 mL of liquid was added, and the mass of liquid added, m L 0 , was determined by reweighing the vial plus liquid.