Determination of Nitrogen by Micro-Dumas Procedure

A Rapid Automatic Microdetermination of Nitrogen.

“…Instrumentation. The Shelberg (10) micro Dumas nitrogen procedure and its modifications lend themselves easily to automation (3). In principle, two combustion tubes separated by a threeway stopcock are used.…”

“…A significant advance was made with the successful introduction (2) of a commercial automatic nitrogen analyzer, and this led us to investigate the possibilities of constructing a similar unit from combustion equipment already existing in our laboratory. It was decided, at the outset, to automate the Shelberg (10) procedure for the analysis of nitrogen since its efficacy as a rapid method is well documented (3, 6, 7). This paper, to a large degree, will be limited to a description of the apparatus and its operation.…”

Determination of etherification levels in acrylamide interpolymers using alcohol exchange-gas chromatographic techniques

“…The moles of acrylamide present in the polymer were determined from the nitrogen content of the dried polymer as determined by the micro-Dumas technique (13). The acrylamide content is calculated using Equation 4.…”

Determination of Nitrogen in Petroleum and Shale Oil

“…In addition to the work reported, most laboratories compared the cooperative method with their current procedures on various types of stocks with entirely satisfactory correspondence. With adequate equipment, some 20 determinations per man per day may be made.…”