Table 2. Figures of Merit for GC–MS/MS and GC–TOFMS.

		GC–TOFMS
	GC–MS/MS	m/z 537.2662	m/z 538.2676	m/z 540.2671
LOQa (μmol L–1)	0.01	0.04	0.06	1
sensitivity (ratio peak area analyte/ISTD per μmol L–1)	0.05	0.84	0.37	0.06
linear rangeb (μmol L–1)	0.03–200	0.04–10	0.06–100	1–200
correlation coefficientb	0.9993 (n = 9)	0.9995 (n = 6)	0.9998 (n = 8)	0.9998 (n = 5)
repeatability QC samples (c = 2.5 μmol L–1)	4% (n = 4,16 h)	9% (n = 7, 22 h)	9% (n = 7, 22 h)	5% (n = 7, 22 h)
repeatability samples (extracts)	1% (n = 6, 25 h)	4% (n = 5, 17 h)	4% (n = 5, 17 h)	12% (n = 5, 17 h)

^aCalculated according to Eurachem,²⁴n = 8, c = 0.05 μmol L^–1 for GC–MS/MS and c = 0.1 μmol L^–1 for TOFMS

^bCorresponding calibration graphs are depicted in Figure S7 for GC–TOFMS and Figure S8 for GC–MS/MS