In all cases, the concentrations of Snomax in the high-density isolates were less than 1% of those in the unprocessed Snomax suspensions. density isolate with an average recovery of 27% (median = 23%, 25 th -75 th percentile = 17% -34%) (Figure and Figure ). There was variability in recovery from experiment to experiment (see different symbol types in Figure ), which can likely be explained, at least in part, by inhomogeneity in the Snomax solutions, which leads to variability from experiment to experiment, even within unprocessed suspensions.