At the end of the heating period the bomb temperature is rapidly lowered from 1055 °C to < 650 °C. As a last step the gaseous products are removed from the bomb and the volumes of CO and H2 are determined. From these values the percentage of oxygen can be calculated providing an appropriate blank is obtained. Compounds con¬taining carbon, hydrogen, nitrogen, sulfur, iodine, and chlorine have been successfully analyzed for oxygen. Organic compounds containing fluorine cannot be analyzed for oxygen by this method, because fluorine reacts with quartz to form oxygen and silicon tetrafluoride.
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