Abstract
A variety of chemical and/or physical procedures has been used in the past to isolate or concentrate the “insoluble” organic matter (commonly called kerogen) present in a sedimentary rock. Chemical methods of removing inorganic mineral matter are reviewed with particular reference to the action of hydrochloric acid, hydrofluoric acid, nitric acid, lithium aluminium hydride, sodium borohydride and zinc/hydrochloric acid. Possible reactions of organic functional groups with these compounds, resulting in a chemically altered kerogen, are indicated.
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