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. 1972 Mar-Apr;76A(2):141–142. doi: 10.6028/jres.076A.015

Table 1.

Results of methyl group determination from compensated spectra

Absorptivity K’, cm2/g Sample standard deviation of K’ CH3 groups per 100 C atoms
1.74 0.053 0.15

K’ in cm2/g is the reduced absorptivity of methyl groups, at com-plete compensations for the absorption due to methylene groups determined for SRM 1475.