The most important unsolved problems of the Kjeldahl method for total nitrogen are
concerned with digestion conditions. The quantity of sulfuric acid used in comparison to the�…

The analysis of nitrogen has been of great concern to various workers in the field of biology
and chemistry, and a great deal of effort has been spent in the development of methods for it�…

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Since the spectacular success of Wilfarth and of Gunning in re-ducing the time required for
Kjeldahl digestions, many chem-ists have attempted to increase the speed of the reactions�…

From time to time, reviews (14, 16, 66) have been published cover-ing both macro- and
micromethods. Comprehensive reports on microchemical methods have been made by�…

The effect of temperature on the rate of Kjeldahl digestions in the absence of catalyst and
oxidizing agent has been studied. Both the clearing time and the minimum time for complete�…

The publications on Kjeldahl's method for determining nitrogen that have appeared since
Kjeldahl's (1) original paper in 1883 perhaps outnumber those on any other analytical�…

An account is given of the development of a system making maximum use of automated
equipment in the routine determination of nitrogen in biological samples when the desired�…

T without sacrificing accuracy. In cereal work this is especially true. While on work of an
entirely different nature, the analysis of rare earths, the author hit upon a solution of the�…

In 1883 Kjeldahl devised a method for the determination of nitrogen, which has become a
classical measurement in analytical chemistry and has been used extensively over the past�…