The de Haas-van Alphen effect has been studied in a series of dilute alloys of tin with antimony at field strengths below 10 000 gauss. Over the range of compositions studied (0-0.23 atomic percent Sb) there was no observable change in the parameters characterizing the de Haas-van Alphen effect other than the collision broadening parameter X, which increased uniformly with concentration of antimony. The temperature dependence of the amplitude of the susceptibility oscillations agrees with the theoretical predictions, but there is evidence that the field dependence does not. An angular dependence of X was observed and interpreted in terms of the lattice geometry. The room temperature magnetic anisotropy was also measured and found to increase by approximately 25 percent for an antimony concentration of 0.23 atomic percent.