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1. WO1996006349 - IMPROVED FLAME IONIZATION DETECTOR

Publication Number WO/1996/006349
Publication Date 29.02.1996
International Application No. PCT/US1995/010895
International Filing Date 23.08.1995
IPC
G01N 27/62 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
62by investigating the ionisation of gases; by investigating electric discharges, e.g. emission of cathode
G01N 30/68 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
30Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography
02Column chromatography
62Detectors specially adapted therefor
64Electrical detectors
68Flame ionisation detectors
CPC
G01N 27/626
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
62by investigating the ionisation of gases; by investigating electric discharges, e.g. emission of cathode
626using heat to ionise a gas
G01N 30/68
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
30Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography
02Column chromatography
62Detectors specially adapted therefor
64Electrical detectors
68Flame ionisation detectors
Applicants
  • CALIFORNIA ANALYTICAL INSTRUMENTS, INC. [US/US]; 1238 West Grove Orange, CA 92665, US
Inventors
  • MATHEWS, Loren, T.; US
  • MEDICI, James, L.; US
Agents
  • VANDERBURGH, John, E.; 608 Sunset Road Louisville, KY 40206, US
Priority Data
08/294,26923.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVED FLAME IONIZATION DETECTOR
(FR) DETECTEUR A IONISATION DE FLAMMES AMELIORE
Abstract
(EN)
A flame ionization detector consisting of a burner assembly (10) which includes a precombustion chamber (54) for mixing the fuel and sample gas, a combustion chamber (56) having a burner nozzle (60) for fluid communication with the precombustion chamber. An annular collector ring (70) and a spring loaded electrode collector (73) to which a potential is applied for the collection of ions are disposed in the combustion chamber (56). The collector (70) is connected to an electrometer (78) for the amplification of a current created by the migration of carbon ions to the collector (70) during combustion. Critical flow orifices (14, 24 and 34) disposed in the lines (12, 22 and 32) are used to deliver fuel gas, air, and sample gas to the flame ionization detector. The sample line (32) communicates with a bypass line (42) and capillary (44) for a passage of a major portion the sample gas directly to an exhaust vent (58).
(FR)
Un détecteur à ionisation de flammes se compose d'un ensemble brûleur (10) qui comprend une chambre de précombustion (54) servant à mélanger le combustible et le gaz d'échantillon, une chambre de combustion (56) pourvue d'un ajutage (60) en communication fluidique avec la chambre de précombustion. Une bague collectrice annulaire (70) et un collecteur d'électrode (73) chargé par ressort, sur lequel est appliqué un potentiel pour la récupération d'ions, sont placés dans la chambre de combustion (56). Le collecteur (70) est raccordé à un électromètre (78) qui amplifie un courant créé par la migration des ions de carbone vers le collecteur (70) lors de la combustion. Des orifices à écoulement critique (14, 24 et 34) placés dans les conduites (12, 22, 32) servent à acheminer le gaz combustible, l'air et le gaz d'échantillon vers le détecteur à ionisation de flammes. La conduite de gaz d'échantillon (32) communique avec une conduite de dérivation (42) et un tube capillaire (44) pour permettre le passage d'une grande partie du gaz d'échantillon directement vers un orifice d'évacuation (58).
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