The k0-standardization method of neutron activation analysis was applied for the multielement analysis of the NIST (National Institute of Standards and Technology) proposed Standard Reference Material (SRM) No. 1547 Peach Leaves. At the moment, 50 elements can be determined from a one day irradiation, using the TRIGA Mark II reactor of the Joef Stefan Institute, Ljubljana. Among them, 28 elements were determined quantitatively, and for the remaining 22 elements, less than values were obtained.