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Table 1 Results of the evaluation of linearity (slope (a), intercept (b), goodness-of-fit coefficient (g), correlation coefficient (r)), limit of quantification (LOQ), limit of detection (LOD) for the LC-MS/MS analysis of carnosine (CAR) and anserine (ANS) in human plasma

From: Ergogenic effect of pre-exercise chicken broth ingestion on a high-intensity cycling time-trial

Component Calibration Range (nM) a b g
(%)
r LOQ
(nM)
LODa
(nM)
CAR 5–10,000 0.035 ± 0.046 0.202 ± 0.017 8.5 ± 0.7 0.9961 ± 0.0006 50 5.7
ANS 5–10,000 0.006 ± 0.000 0.044 ± 0.021 6.0 ± 2.2 0.9978 ± 0.0015 50 10.6
  1. Note: acceptance criteria: r ≥ 0.99, g ≤ 20%; aLOD = 3 x Sres/a with Sres = residual standard deviation (corresponding with the standard deviation of the intercept (b) of minimal 3 calibration curves) and a = slope