The ultrasound radiation is a powerful tool to facilitate emulsi- fication and homogenization, which provides an efficient contact between sample matrix and extractant, accelerates the mass transfer between two immiscible phases in the extraction process, leading to enhancement of extraction efficiency with a minimum equilibrium time [30]. A detailed application of the UAE technique to the environmental and food samples has been published specifically [31]. The solvent extraction-based methods including LLE, dispersive liquid–liquid extraction (DLLE), and DLLME, etc., can easily be modified or combined with other sample preparation techniques for particular purposes. In this way, ultrasound- assisted dispersive liquid–liquid extraction (UADLLE) [29], ultrasound-assisted matrix solid-phase dispersive liquid extraction (UAMSPDLE) [32] and dispersive derivatization liquid–liquid extraction (DDLLE) [33] have been developed as good alternatives to conventional LLE. An ultrasound-assisted emulsification micro- extraction (UAEME) enjoying the performance advantages of both UAE and DLLME has been applied to the determination of triclosan [34], phthalate ester [35], formaldehyde [36] and nitrite [37] in cosmetics. However, large amounts of organic compounds in cosmetics can also be co-extracted along with the target analytes that will cause the serious matrix interferences. Moreover, cen- trifugation of large-volume samples is too difficult to carry out. Therefore, these modified DLLE and DLLME approaches are still unsuitable for the direct detection of alkanolamines and alkyla- mines in cosmetics, and additional clean-up procedures are gen- erally needed. Considering the characteristic ingredients of cosmetics, the dominant organic compounds can be efficiently removed by using an appropriate organic solvent while the target analytes are still remained in the acid solutions. It can significantly simplify the operation step and obtain extracts clean enough for direct injection. Thus the development of a simple, rapid and high selectivity DLLE procedure combining extraction and cleanup in one single step is of great significance.