You are here: Home / Using the Lab / Analysis / Soils / 320

320

Total Nitrogen And Carbon - Combustion Method

Fertility: N, C

Summary

This analytical method quantitatively determines the total amount of nitrogen and carbon in all forms in soil using a dynamic flash combustion system coupled with a gas chromatographic (GC) separation system and thermal conductivity detection (TCD) system. The analytical method is based on the complete and instantaneous oxidation of the sample by “flash combustion” which converts all organic and inorganic substances into combustion gases (N2, NOx, CO2, and H2O). The method has a detection limit of approximately 0.02% for carbon and nitrogen.

Sample material must be ground to the consistency of fine powder for these analyses.
Sample amount requested: 2 g
Questions concerning limited sample size can be answered by the UC Davis Analytical Laboratory.

AOAC Official Method 972.43, Microchemical Determination of Carbon, Hydrogen, and Nitrogen, Automated Method, in Official Methods of Analysis of AOAC International, 16th Edition (1997), Chapter 12, pp. 5-6, AOAC International, Arlington, VA.