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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Forensic Sci Int. 2015 Oct 26;257:435–441. doi: 10.1016/j.forsciint.2015.10.021

Table 4.

Ion suppression or enhancement percentages calculated at the high and low QC concentrations using ten different lots of whole blood extracts and run in duplicate compared to six un-extracted samples.

Drug
Concentration		 Fentanyl
0.0005 mg/L		 Norfentanyl
0.0005 mg/L		 Acetyl Fentanyl
0.001 mg/L		 Acetyl Norfentanyl
0.001 mg/L
% suppression/enhancement 1 −25 −18 −4
% CV 15 14 14 14
Concentration 0.040 mg/L 0.040 mg/L 0.080 mg/L 0.080 mg/L
% suppression/enhancement −4 −3 −10 −8
% CV 14 7 12 9
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