Table 2. Limits of detection (LOD), limits of quantification (LOQ), linear equations, regression coefficients (r²) and recovery rates of PAHs determined with GC-MS

PAH compounds	LOD (μg/kg)	LOQ (μg/kg)	Linear equation (y = a + bx)	r2	Recovery (%)
Naphthalene	1.984	6.613	y = 10.383 + 0.680x	0.9948	114.86
Acenaphthylene	0.651	2.170	y = –0.570 + 0.807x	0.9987	100.10
Acenaphthene	0.991	3.303	y = 0.001 + 0.337x	0.9988	99.04
Fluorene	0.329	1.097	y = –0.064 + 0.384x	0.9991	96.22
Phenanthrene	0.332	1.107	y = 0.100 + 0.392x	0.9987	91.66
Anthracene	0.658	2.193	y = –0.290 + 0.372x	0.9982	93.50
Fluoranthene	0.495	1.650	y = –0.259 + 0.318x	0.9978	97.92
Pyrene	0.503	1.677	y = –0.306 + 0.360x	0.9977	97.74
Benzo[a]anthracene	1.347	4.490	y = –0.858 + 0.353x	0.9908	112.86
Chrysene	1.650	5.500	y = –0.343 + 0.431x	0.9961	107.62
Benzo[b]fluoranthene	0.990	3.300	y = –1.220 + 0.465x	0.9959	102.46
Benzo[k]fluoranthene	1.623	5.410	y = –1.668 + 0.631x	0.9912	104.48
Benzo[a]pyrene	1.155	3.850	y = –1.786 + 0.562x	0.9916	108.44
Indeno[1,2,3-cd]pyrene	1.287	4.290	y = –0.891 + 0.241x	0.9930	102.96
Dibenzo[a,h]anthracene	1.169	3.897	y = –0.987 + 0.237x	0.9936	99.84
Benzo[ghi]perylene	0.821	2.737	y = –0.692 + 0.257x	0.9938	104.84

PAHs, polycyclic aromatic hydrocarbons; GC-MS, gas chromatography–mass spectrometry.