Quantitative parameters of the DLLME – GC-MS method for the determination of the selected PEs.

Compound	Linearity range (μg mL−1)	r 2	LODa (μg mL−1)	LOQb (μg mL−1)	RSDc %		EFd	Recoverye (%)
					Intra-day	Inter-day
DMP	0.0010–1.0	0.9998	5.0 × 10−6	2.0 × 10−5	1.36	2.75	510	91.8
DEP	0.0010–1.0	0.9998	6.0 × 10−6	2.2 × 10−5	1.77	2.39	513	92.3
DBP	0.0010–1.0	0.9996	3.0 × 10−6	1.3 × 10−5	3.66	3.46	476	85.6
BBP	0.0015–1.0	0.9985	7.0 × 10−5	2.0 × 10−4	3.01	4.12	487	87.6
DEHP	0.0010–1.0	0.9987	4.0 × 10−6	1.5 × 10−5	2.25	3.33	532	95.8

^aLimit of detection (S/N = 3).

^bLimit of quantification (S/N = 10).

^cRelative standard deviation for (n = 3) at concentration of 0.02 μg mL⁻¹ of each PEs.

^dEnrichment factor.

^eFor water sample spiked with 0.02 μg mL⁻¹ PEs.