2.4. Fourier transform infrared spectroscopy
An FT-IR spectrometer (Bruker Vetex70 FTIR instrument, Germany)
was employed to investigate the characteristic spectra of the
extracted pectins. Dried sample (1 mg) and potassium bromide
(100 mg) was mixed, ground and pressed into tablets, thereafter it
was scanned within the range of 4000e400 cm1 (