Comparison of the proposed DLLME – GC-MS method with other methods for the determination of PEs in perfumes and/or cosmetics.

Method	Matrix	Extractiontime	Extraction Solvent volume	Detection method	LODs (ng mL−1)	Linearity (ng mL−1)	Ref.
UAE-DLLMEa	Cleaning and PCPsb	20 s	150 μL CCl4 + 3 mL acetonitrile	LC-MS-MS	0.04–0.45	0.4–50	24
UAE-DLLME	Cleaning and PCPs	20 s	150 μL CCl4 + 3 mL acetonitrile	LC-DAD	0.13–1.0	2.0–50	24
DLLME-SFO	Waters and cosmetics	10 min	20 μL 1-dodecanol + 30 μL acetone	LC-DAD	20.0–170.0	500.0–50 000	25
USAEME-SFOc	Waters and cosmetics	12 min	30 μL 1-undecanol	LC-DAD	0.005–0.01	0.05–1000	26
USESSMd	Waters and cosmetics	1 min	4 mL THF containing 30 mg decanoic acid	LC-UV	0.1–0.7	0.5–100	27
SPMEe	Perfumes	23 min	—	GC-MS	0.513–0.770	0.75–24	31
DLLME	Perfumes	30 s	20 μL C6H5Cl + 0.5 mL acetone	GC-MS	0.003–0.070	1.0–1000	Represented work

^aUltrasonic-assisted extraction.

^bPersonal-care products.

^cUltrasound-assisted emulsification microextraction with solidification of floating organic droplet.

^dUltrasonically enhanced supramolecular solvent microextraction.

^eSolid phase microextraction.