3.2. Product characterization
The FTIR spectrum was employed to confirm the presence of
solketal in the purified solketal products. The FTIR spectrum of a
typical solketal product is shown in Fig. 3. A strong IR band at
around 3400–3600 cm
1
was observed which ascribes to the
OAH stretching band resulted in the intermolecular and intramolecular hydrogen bonds present in the solketal. The IR absorption
peaks at around 1000–1100 cm
1
can be attributed to the symmetrical stretching of CAO band in solketal molecular structure[25],
confirming the production of solketal in the experiments. In this
work, GC–MS and FT-IR were conducted for qualitative analysis
of the products. The molecular weight of 132 of solketal is confirmed by MS, and the m/z signal at 43 was assigned to the loss
of dioxolane group[26