Optimization of SPE/GC/HPLC Analytical Procedure for Determination of Phenol, Quinones, and Carboxylic Acids in Water Samples

Table 3

LOD and LOQ determined for each compound in SPE/GC/HPLC procedure taking the recovery on SPE sorbents into consideration (μg/mL of water sample).

COMPOUND	BM-DVB		DMN-DVB		MEDDE-DVB		MEMDE-DVB		SDB-1
	LOD	LOQ	LOD	LOQ	LOD	LOQ	LOD	LOQ	LOD	LOQ
Phenol-acetic deriv.	13.00	42.92	13.43	44.31	18.56	61.25	23.83	78.65	11.98	39.52
Hydroquinone-acetic deriv.	16.71	55.15	16.71	55.13	21.46	70.82	23.63	78.00	16.78	55.36
Benzoquinone	0.043	0.143	0.044	0.156	0.047	0.155	0.050	0.165	0.042	0.138
Maleic acid	4.58	15.13	4.47	14.75	4.80	15.85	4.91	16.21	4.59	15.15
Fumaric acid	6.88	22.37	7.40	24.41	6.50	21.45	6.78	22.37	6.45	21.30