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SAMPLE PREPARATION FOR 15 K SHPOLSKII FLUORIMETRY OF POLYNUCLEAR AROMATIC HYDROCARBONS USING A CLOSED-CYCLE HELIUM CRYOSTAT. APPLICATION TO THE ANALYSIS OF METHYLPHENANTHRENES IN A CRUDE OIL.

UTILISATION D'UN CRYOGENERATEUR A CYCLE FERME POUR L'ANALYSE FLUORIMETRIQUE DES HYDROCARBURES AROMATIQUES POLYNUCLEAIRES (HAP) EN MATRICE SHPOLSKII A 15 K. APPLICATION A L'ANALYSE DES METHYLPHENANTHRENES DANS UN PETROLE.

Author(s) : GARRIGUES P.

Type of article: Article

Summary

A SIMPLE PROCEDURE IS DESCRIBED FOR ANALYSIS BY HIGH RESOLUTION FLUORIMETRY OF POLYNUCLEAR AROMATIC HYDROCARBONS (PAH) AT 15K IN SHPOLSKII MATRICES USING A COMMERCIAL CRYOGENERATOR. THE SAMPLES ARE FIRST IMMERSED IN LIQUID NITROGEN TO GUARANTEE FAST COOLING CONDITIONS, NECESSARY IN SOME CASES, TO OBSERVE THE QUASILINE STRUCTURE. PROVIDED THAT GOOD THERMAL CONTACTS ARE ESTABLISHED THE SPECTRA OBTAINED AT 15 K ARE QUITE SIMILAR TO THOSE OBTAINED AT 4.2 K USING A CONVENTIONAL LIQUID HELIUM CRYOSTAT. THE METHOD IS APPLIED TO THE IDENTIFICATION OF EACH OF THE FIVE MONOMETHYLPHENANTHRENE ISOMERS IN A NATURAL OIL EXTRACT.

Details

  • Original title: UTILISATION D'UN CRYOGENERATEUR A CYCLE FERME POUR L'ANALYSE FLUORIMETRIQUE DES HYDROCARBURES AROMATIQUES POLYNUCLEAIRES (HAP) EN MATRICE SHPOLSKII A 15 K. APPLICATION A L'ANALYSE DES METHYLPHENANTHRENES DANS UN PETROLE.
  • Record ID : 1982-1446
  • Languages: French
  • Source: C. R. Acad. Sci., Sér. II - vol. 293 - n. 8
  • Publication date: 1981/11/02
  • Document available for consultation in the library of the IIR headquarters only.

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