Analysis of the particle mass spectrum PDG-2016

The discreteness in particle masses and parameters of the Standard Model with the period $\delta$=16$m_e$ was derived earlier from masses of the muon, the pion and nucleons. Corresponding integer values of this parameter (n=13,17 and 115) were redetermined from the exactly known relation between the nucleon masses and the electron mass in CODATA evaluation. For an independent check of these empirical relations the analysis of nuclear data and particle masses from the recent Particle Data Group Compilation PDG-2016 was performed. On the distribution of differences $\Delta M$ between 137 mass values known with an accuracy better than 8 MeV the grouping effect in masses was found at $\Delta M$=2$\delta$, 6$\delta$, 17$\delta$=142\,MeV=$m_\pi$, 12$m_\pi$, 24$m_\pi$, the constituent quark masses 445-460\,MeV and at the b-quark mass (about 4\,GeV). Stability of the common CODATA mass--intervals observed in different mass regions and exactly expressed as 16 electron rest mass (the tuning effect) is a unique property of particle mass spectrum. This is in accordance with the suggestion by Y.\,Nambu that empirical relations in particle masses are important for the development of the Standard Model.