Influence of salts in the Hofmeister series on the physical gelation behavior of gelatin in aqueous solutions

The effect of various inorganic salts on the physical gelation behavior of the gelatin solutions was investigated by Fourier transform infrared (FTIR) spectrometer, polarimeter, rheometer, X-ray diffraction and differential scanning calorimetry. It was found that strongly hydrated anions, such as SO42− and H2PO4−, facilitated the gelation of the biopolymer solutions, evidenced by the increases of the length and content of triple helices. On the...