From the results obtained in the optimisation of the variables
that affect the extraction efficiency of THMs, the analytical figures
of merit were investigated. The linearity range of the HS-SPME–
GC–ECD method was evaluated by constructing the calibration
curves of the height relative to the internal standard dichloromethane
versus concentration of CHCl3 and CHCl2Br, and internal standard
diiodomethane versus concentration of CHBr3 using a sample
of mineral water (free of THMs).