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. Author manuscript; available in PMC: 2021 Oct 15.
Published in final edited form as: Rapid Commun Mass Spectrom. 2020 Oct 15;34(19):e8898. doi: 10.1002/rcm.8898

Table 5.

Precision of quality control materials.

Analyte Low
Concentration
(STD1, μg/L)		 Medium
Concentration
(STD3, μg/L)		 High
Concentration
(STD5, μg/L)
Mean (STDEV) % CV Mean (STDEV) % CV Mean (STDEV) % CV
n-Hexane 0.062 (0.007) 10.6 0.250 (0.010) 3.82 3.56 (0.114) 3.21
n-Heptane 0.058 (0.010) 18.1 0.220 (0.021) 9.73 2.89 (0.301) 10.4
n-Octane 0.073 (0.007) 9.88 0.334 (0.007) 1.98 4.73 (0.257) 5.44
Methylcyclopentane 0.023 (0.002) 6.58 0.122 (0.006) 5.30 1.49 (0.050) 3.34
Cyclohexane 0.019 (0.001) 6.04 0.109 (0.002) 1.98 1.39 (0.038) 2.75

STDEV: Standard deviation