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. Author manuscript; available in PMC: 2008 Nov 18.
Published in final edited form as: J AOAC Int. 2004;87(1):1–14.

Table 3.

Single-laboratory validation data: Accuracya

NE
 EP
 PS
 ME
 MP
Spike
level, μg/g		 Recovery,
%		 Spike
level, μg/g		 Recovery,
%		 Spike
level, μg/g		 Recovery,
%		 Spike
level, μg/g		 Recovery,
%		 Spike
level, μg/g		 Recovery,
%
 97.5 88.7 4045 86.6 488 87.2 109 80.4 103 83.0
195 85.6 8100 84.3 975 84.6 218 77.2 206 81.0
592 86.8 12100 85.8 1460 85.7 327 77.6 309 83.4
a

NE = Norephedrine; EP = ephedrine; PS = pseudoephedrine; ME = methylephedrine; MP = methylpseudoephedrine. (Note: Accuracy of NP was not determined as laboratory did not have required DEA license.)