After the conversion, the cation content of the sodium type KC
was determined by atomic absorption spectrometer: 6.32% Na+,
0.067% K+, 0.0027% Mg2+, 0.0083% Ca2+. The number and weight
average molar mass, Mn = 389 kDa and Mw = 467 kDa, were determined
by GPC–MALLS with 0.1 M sodium iodide solution as both
solvent and eluent.