Centrifugation (μg/ml) Filtration (μg/ml) Standard     Mean 4.98 4.89 S.D 0.023 0.023 %RSD 0.463 0.471 Sample     Mean 4.79 4.73 S.D 0.036 0.026 %RSD 0.752 0.559 n= 3

Table 7: Filter evaluation data.