Abstract
A method is presented for determining arylmethoxyl groups which involves oxidative degradation with trifluoroperoxyacetic acid. Vitrinites from all coal ranks contain a small and constant amount of arylmethoxyl. There is little if any arylmethoxyl in sporinite or resinite. No arylmethoxyl was detected in fusinite and semifusinite, but the results are less certain because of the insolubility of these macerals in the reagent. The amount of arylmethoxyl in vitrinites is proposed as a measure of the extent of aerobic biodegradation in coalification.
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