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. Author manuscript; available in PMC: 2024 May 15.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2023 Apr 21;1223:123725. doi: 10.1016/j.jchromb.2023.123725

Table II.

Inter-day and intra-day PEth PQC statistics.

Inter-assay Statistics Intra-assay Ranges
Nominal Concentration (ng/mL) 23.9 44.8 217
Mean 24.4 45.7 225 Low
PQC		 Medium
PQC		 High
PQC
SD 1.76 1.97 13.6 %CV, min 4.4 1.6 2.7
CV (%) 7.2 4.3 6.1 %CV, max 7.0 4.7 4.9
Deviation from Nominal (%) 2.3 2.0 3.8 %error,
min		 −3.5 −0.8 −1.8
n 18 18 18 %error,
max		 8.5 4.5 9.4