  Mass measurements of $^{49,50}$Sc, $^{70}$As, $^{73}$Br and $^{196}$Hg
nuclides produced at CERN's radioactive-ion beam facility ISOLDE are presented.
The measurements were performed at the ISOLTRAP mass spectrometer by use of the
multi-reflection time-of-flight and the Penning-trap mass spectrometry
techniques. The new results agree well with previously known literature values.
The mass accuracy for all cases has been improved.
