Limits on the accuracy
(Preston, 1996, 2001) and resolution (only four broad C types
defined) of the technique are clear, but perhaps more importantly
the division of C types is not at the most appropriate scale to adequately
capture the features of soil organic matter chemistry that
are likely to influence sorption affinity (Salloum et al., 2001b).
Chemical shift, the parameter used to define the four different C
types, is a measure of the chemical environment at the atomic
scale