Sixty-one Augustan quadrantes were analysed for calcium, iron, nickel, copper, silver, tin, antimony, and lead by X-ray fluorescence. Most coins contained about 99.7% copper with the other seven elements present as trace impurities. Significant differences in composition were found for the three different issues of quadrantes minted in <i>c. 9 B.C. indicating that these issues were not minted exactly contemporaneously. Quadrantes minted in <i>c. 4 B.C. have trace element concentrations in ranges that differ from those of the 9 B.C. quadrantes. The precision is very good for all trace elements (the precision of calcium was not calculated): average standard deviations are 0.0021% for Fe, 0.0026% for Ni, 0.0038% for Ag, 0.0014% for Sn, 0.0031% for Sb, and 0.015 for Pb. -- AATA -- AATA