有機微量分析に関する研究 (第8報)

燃焼法による有機水銀微量分析

抄録

Microdetermination of organic mercurials by combustion method is described. The sample is weighed into a quartz boat and burned in a quartz combustion tube having two inlets, while passing oxygen. Mercury in organic compound will change into mercuric oxide or further undergo decomposition by the temperature inside the heating furnace to form mercury vapor which will be adsorbed on gold wire filled in the absorption funnel. The amount of mercury is calculated from changes in the funnel weight. Test carried out with purified mercury showed that the amount of mercury is completely adsorbed on the gold wire. If the sample does not contain halogen or sulfur, empty combustion tube (Fig. 1) is used, while a tube filled with calcium oxide is used when one or two of these elements is present (Fig. 2). This method is more simple in procedure than the existing method and takes shorter time, requiring only about 40 minutes.