GASOMETRIC MICRO-KJELDAHL DETERMINATION OF NITROGEN

Adaptation of the Micro-kjeldahl Method for the Determination of Nitrogen in Plant Tissues.

The micro-Kjeldahl method for nitrogen determination has been widely used in organic chemistry laboratories in recent years. The value of this method, developed through the brilliant researches of PiLcH, BANG, PARNAS and WAGNER, PREGL, and coworkers, has justified its application to industrial and clinical problems. Plant physiologists have not generally adopted quantitative micro-methods for n...

Formed Measurements of the Ammonia Titrimetric and Gasometric Mercury as Catalyst, and Description of Methods with Nitrogen in Proteins: Kjeldahl Determination of a Study of Conditions

A study of conditions for Kjeldahl determination of nitrogen in proteins; description of methods with mercury as catalyst, and titrimetric and gasometric measurements of the ammonia formed.

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 method in the same period of time.1 The diversity of papers is attributable to the immense usefulness of the method, to its need for modifications for applications to various types of organic and inorganic compounds, and to...

Determination of dissolved organic nitrogen in seawater using Kjeldahl digestion after inorganic nitrogen removal

RÉSUMÉ M. D. DOVAL *,Fernando FRAGA and Fiz F. PEREZ Instituto de Investigaciones Marinas de Vigo (CSIC), Eduardo Cabello, 6, E-36208 Vigo, Spain. * Corresponding author. E-mail:[email protected] Received 15/02/96, in revised form 04/12/96, accepted 16/01/97. An update of the Kjeldahl method is presented for the direct determination of dissolved organic nitrogen (DON) in seawater. Dissolved in...

A Comparison of the Urea Nitrogen Content of Cutaneous and Venous Blood by Micro Gasometric Analysis.

Svensgaard (1) using the micro urea method of Rehberg (2) compared the urea concentrations in blood from the arm vein with that of cutaneous blood from the lobe of the ear. In 29 of 32 analyses of the blood of normal fasting subjects she found the urea of the capillary blood higher thamn that of the venous blood. The average difference was 10 per cent of the venous urea content, but individual ...