Comparison of DPHSE with other leaching techniques

Comparison of DPHSE with other leaching techniques 

As in ASE, the efficiency of DPHSE for extracting compounds from soils has been compared with that of other techniques such as Soxhlet, microwave-assisted (MAE) and, especially, supercritical fluid extraction (SEE). 

The advantages of DPHSE over Soxhlet extraction include not only decreased solvent consumption and operation times [25,158,179], but also the avoidance of organic solvents as extractants (water is the usual leaching agent) and the amenability to coupling to other operations of the analytical process, as described in the previous section. 

As with ASE, the advantages and disadvantages of DPHSE with respect to MAE and SEE are not so clear and depend on the particular application. 

In fact, DPHSE has rarely been compared with MAE. The former has been found to provide results similar to [167] or better than [52] those of the latter in the extraction of Irganox from polypropylene, where prolonged microwave exposure resulted in degradation of the polymer. 

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