Walter M. Lauer

An adaptation of Pregl’s microcombustion to a semi-microcombustion method for the determination of nitrogen

1. A semi-micro method based uponPregl’s excellent micromethod for the determination of nitrogen in organic compounds has been described.

An adaptation of Pregl’s microcombustion to a semi-microcombustion method for the determination of carbon and hydrogen

1. A semi-microcombustion method for the determination of carbon and hydrogen, which is a combination of the method ofWise, of the more recent method ofPregl, together with some modifications, has been described. 2. The results obtained by its use in the case of compounds containing only carbon, hydrogen and oxgen are as satisfactory as those obtained by the methods of micro-combustion, and they are more conveniently obtained.