Limit of detection (LOD) and limit of quantification (LOQ) for
Trp were calculated from the calibration line at the lowest
concentration using the following equations: LOD = 3 SD,
LOQ = 10 SD, (SD: standard deviation). LOD and LOQ values have
been shown in the Table 1. In practice, LOQ value was found to be
suitable compared to signal-to-noise ratio (10:1).