[en] Compared to heavy ion AMS at large tandem accelerators (TV≥8 MV) and for cases where stable isobar interference is absent, a small facility like VERA (TV=3 MV) is shown to be able to offset the disadvantage of lower ion energy. After testing the system with ²¹⁰Pb/²⁰⁸Pb isotope ratio measurements, we prove this by a measurement of ²³⁶U at natural levels in a material separated before 1918 and therefore free from anthropogenic contamination. An isotopic ratio of ²³⁶U/²³⁸U=(6.1±0.4)x10^-11 was found for this material