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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Clin Biochem. 2019 Nov 7;75:70–77. doi: 10.1016/j.clinbiochem.2019.10.009

Table 4.

IS Precision

LOD %CV (n=20) 200 ng/mL %CV (n=20) 2000 ng/mL %CV (n=20) Combined %CV (n=60)
6-Monoacetylmorphine-d6 16.0 8.4 13.4 20.2
Codeine-d6 15.0 13.6 18.5 21.8
Hydrocodone-d3 19.4 10.6 16.2 24.0
Hydromorphone-d6 21.1 13.5 14.4 18.9
Methamphetamine-d9 15.9 10.3 12.3 15.2
Morphine-d3 13.6 16.7 19.5 20.3
Naloxone-d5 16.3 17.3 17.3 17.5
Noroxycodone-d3 21.7 13.0 23.5 26.6
Oxymorphone-d3 21.1 10.0 29.6 23.5