Universidad de Zaragoza CSIC



The goal of this service is the simultaneous determination of the percentage of carbon (C), hydrogen (H), nitrogen (N), and sulfur (S) on a given sample, being either in liquid or in solid state. 

This technique is based on the complete combustion of the sample, under optimal conditions (1000-1300 ºC, O2 atmosphere), in order to transform the target elements (C, H, N, S) into CO2, H2O, N2 and SO2, respectively.

AnalizadorThese gases, after frontal crhomatographic separation, are detected, quantified, and processed taking onto account the weight of the sample and the calibration performed with a standard reference. This process finally affords the percentage of each element in the problem sample.


Elemental microanalyser CHNS Perkin-Elmer EA-2400 Series II.


  • Determination of the basic stoichiometry of organic and organometallic compounds of unknown composition.
  • Determination of the degree of purity of a sample with known stoichiometry.


Petrochemical, pharmaceutical, agrochemical of food industries, amongst others.

Universities and Research Institutes, dealing with either applied or fundamental research.