The intrinsic viscosity, [], of xanthan in 1 × 10−1mol/L NaClsolution at 25◦C was determined as being 13.99 dL/g (Table 1) byusing Rao method [38]
which will be
discussed in
Section
3.1.Inorganic
monovalent salts
(NaCl and KCl) purchased fromSigma-Aldrich were used as-received.