Direct mass measurements of neutron-deficient nuclides around the N=50 shell closure below 100Sn were performed at FRS Ion Catcher (FRS-IC) GSI, Germany. The nuclei produced by projectile fragmentation 124Xe, separated in fragment separator and delivered to FRS-IC. masses 14 ground states two isomers measured with relative uncertainties down 1×10−7 using multiple-reflection time-of-flight spect...