Verifying the symmetry of ultra-fast scanning calorimeters using liquid crystal secondary temperature standards

► Phase transitions of 8OCB, HP53 and BCH52 were investigated by chip calorimeters. ► Phase transitions critically depend on the stability of the crystalline state. ► Peak temperature of the N-I transition of 8OCB is continuous and symmetric. ► Suggest 8OCB as a candidate for the symmetry verification of chip calorimeters.