Many sample preparation
methods such as solid-phase extraction (SPE), solid phase
microextraction (SPME) and headspace solid phase microextraction
(HS-SPME) have been reported for the pretreatment
of aldehydes in different samples. However, in addition
to time consuming, tedious and dependent on large volumes of
samples, SPE may cause environmental pollution by using and discarding
abundant organic solvents.