Table 4 compares the
characteristic data for the proposed method with those of other
reported techniques such as SPE, SPME, Headspace solid-phase
microextraction, Polymer monolith microextraction, and Tenax
TA trap coupled to a UV-ion mobility spectrometer. Compared to
reported methods that some of them needs more preparation steps before determination, our results suggested that the ultrasoundassisted
back-extraction coupled with gas chromatography–flame
ionization detection methods provided a reliable and effective
solution to direct extraction and determine low concentrations of
mentioned aldehydes in heated vegetable oil samples. It is clearly
noticed that the represented method gives comparable analytical
results and can afford good sensitivity and quantification
extraction efficiency, wide linear range, good limit of detections
with advantages of better reproducibility relative to the other
techniques.