PROCEDE DE DETECTION ET D'ANALYSE DE GAZ, NOTAMMENT POUR LA PREVENTION DES INCENDIES

PROCEDE DE DETECTION ET D'ANALYSE DE GAZ.ON UTILISE COMME ELEMENT DE DETECTION UN SEMI-CONDUCTEUR ORGANIQUE DU GROUPE COMPRENANT NOTAMMENT: LES DERIVES QUINONIQUES, LES AMINES, LES INDOPHENOLS, LES DERIVES PHENOLIQUES ET AZOIQUES, LES AMIDES, LES AMINO-ACIDES, LES POLYMERES DONNEURS, LES COMPLEXES ORGANIQUES A TRANSFERT DE CHARGE A POLYMERE DONNEUR.DETECTION D'INCENDIE. 1. A method for the detection and analysis of gas or vapour, applicable to the prevention of risks due to combustion and comprising controlling the medium to be protected by an elementary sensitive unit including an organic semiconductor element the conductivity of which changes in the presence of the gas or gases and/or vapours to be controlled, wherein the organic semiconductor belongs to one of the following groups : - aromatic amines or polyamines salifyed or not, -- indophenols, - phenolic derivatives containing or not nitrogenous functions and/or carboxylic groups, - aromatic azo or diazo derivatives containing or not other types of nitrogenous groupings, - amino acids, - polypropylenes or polyvinyl-pyridine as donor polymers, and wherein the organic semiconductor is subjected to a preparation with solutions or atmospheres having variable oxidation levels.