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Table 3 Purity of extracts in routine casework using Microsep 30 K and Amicon Ultra 30 K

From: Purification of crime scene DNA extracts using centrifugal filter devices

Sample type Inhibition following Microsep 30 K purification (1 May 2011 to 31 August 2011) Inhibition following Amicon Ultra 30 K purification (1 October 2011 to 29 February 2012)
Rape case samples 41% (n = 1,432) 16% (n = 2,094)
Hairs 31% (n = 94) 26% (n = 130)
Touch stains on mini-tape 43% (n = 1,439) 26% (n = 2,641)
Organically extracted samples 52% (n = 21) 11% (n = 18)
  1. Crime scene DNA extracts are defined as PCR-inhibitory if they generate a shift of the Quantifiler Human IPC Cq compared to the normal value for pure reactions.