Abstract
Flow field-flow fractionation (FFF) has previously been used in successful fractionation and characterisation of the ultra-large wheat protein glutenin. The many parameters, which may influence the retention behaviour, especially when analysing extremely high-molecular-mass samples such as glutenin, are here reported. Size determination from the sample retention time, using FFF theory, will as a result have a very low accuracy. The need for direct molecular mass determination, such as by light scattering, in combination with FFF, in order to do accurate size measurements of glutenin is pointed out as well as the importance to minimise the overloading.
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