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HYDROGEN FLAME DETECTOR [9 records]

Record 1 2016-03-30

English

Subject field(s)
  • Analytical Chemistry
DEF

auxiliary gases : The gases required for detector operation, e. g. hydrogen and air for flame detectors.

OBS

Gas chromatography.

OBS

auxiliary gas: The plural form of this term (auxiliary gases) and the plural definition were standardized by ISO in 2014.

Key term(s)
  • auxiliary gases

French

Domaine(s)
  • Chimie analytique
DEF

Gaz nécessaire pour faire fonctionner le détecteur, par exemple l’hydrogène et l’air pour les détecteurs à flamme.

OBS

Chromatographie en phase gazeuse.

OBS

gaz auxiliaire : terme et définition normalisés par l'ISO en 2014.

Spanish

Save record 1

Record 2 2012-01-16

English

Subject field(s)
  • Analytical Chemistry
  • Phraseology
CONT

Karmen reported a hydrogen flame ionization detector sensitive only to compounds containing phosphorus, bromine, chlorine, and iodine. He noted that halogens or phosphorus increased the electrical conductivity of the flame in the presence of a wire, ceramic, or glass probe containing a sodium compound.

PHR

Glass probe.

French

Domaine(s)
  • Chimie analytique
  • Phraséologie

Spanish

Save record 2

Record 3 2004-07-14

English

Subject field(s)
  • Analytical Chemistry
CONT

A sensitive flame ionization detector was developed for capillary column gas chromatography. The detector used no make-up gas and lower flow-rates of hydrogen and air to suppress detector noise and to achieve maximum response. The detector was responsive down to the 10 SUP-SUP 1 SUP 3 g level for C SUB 2-C SUB 1 SUB 1 hydrocarbons. Atmospheric hydrocarbons could be determined at parts per billion or parts per trillion levels by using gas chromatography with the detector via cryogenic concentration of a small volume of air sample.(Pascal Data Base).

French

Domaine(s)
  • Chimie analytique
CONT

chromatographie à ionisation de flamme

OBS

Couplage de la chromatographie en phase dioxyde de carbone supercritique sur colonnes remplies avec la détection a ionisation de flamme. Applications à l'analyse des produits pétroliers. (Base de données Pascal).

Spanish

Campo(s) temático(s)
  • Química analítica
DEF

[Se díce de los instrumentos que determinan el grado de] contaminantes basados en la medida de los iones que se forman en un proceso de combustión de hidrógeno cuando se introduce un contaminante.

Save record 3

Record 4 2001-01-24

English

Subject field(s)
  • Analytical Chemistry
  • Scientific Instruments
  • Scientific Measurements and Analyses
DEF

A modified flame ionization detector in which the hydrogen flame is burnt at a jet with an alkali metal salt tip or with the alkali metal salt as a pellet just above the jet.

OBS

nitrogen phosphorous detector; NPD: term and abbreviation extracted from the "Disarmament and Peace Keeping" glossary with the permission of the United Nations Office at Geneva.

Key term(s)
  • alkalimetalflame ionization detector

French

Domaine(s)
  • Chimie analytique
  • Instruments scientifiques
  • Mesures et analyse (Sciences)
OBS

Le premier équivalent proposé dans SECHR est tiré d'un ouvrage intitulé : «Manuel pratique de chromatographie en phase gazeuse» de J. Tranchant et coll. publié chez Masson, Paris, 2e édition, 1968, p. xi-178.

OBS

Le deuxième équivalent proposé dans SECHR est tiré d'un article intitulé : «Méthodes de contrôle de la pollution des eaux. Les pesticides et leur détermination dans les eaux de surface», signé par J. Lamathe, G. Maire, Ch. Magurno, paru dans la Tribune de CEBEDEAU, 34 : 446, 1981, p. 15-50.

OBS

détecteur azote-phosphore; détecteur thermo-ionique : terme(s) tiré(s) du lexique «Désarmement et Maintien de la Paix» avec l'autorisation de l'Office des Nations Unies à Genève.

Key term(s)
  • DTI

Spanish

Save record 4

Record 5 1999-04-23

English

Subject field(s)
  • Analytical Chemistry
DEF

In this form of transport detector for h. p. l. c. [high-performance liquid chromatography], the eluate is deposited upon a fine stainless steel wire that has been cleaned by being heated at 850°C. The volatile solvent is evaporated and the solute oxidized at 700-800°C in air to a mixture of carbon dioxide and water. The oxidation products are mixed with hydrogen and passed over a nickel catalyst at 330°C to give methane which is burnt in a flame ionization detector to give an electrical signal that can be amplified and recorded. The detector gives a linear response over a wide concentration range [...] The sensitivity has been improved and the noise level reduced by using either a ceramic(kaolin) or ceramic-metal(kaolin and copper) coating to the wire.

Key term(s)
  • moving-wire detector
  • moving-filament detector

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 5

Record 6 1998-03-02

English

Subject field(s)
  • Analytical Chemistry
DEF

This is another g. c. detector in which the column effluent is destroyed by combustion in a hydrogen flame at a small glass capillary; the device measures changes in temperature of the flame detected by a thermocouple.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 6

Record 7 1996-11-07

English

Subject field(s)
  • Analytical Chemistry
CONT

In 1958, Primavesi et al. made a detailed investigation into the shape or thermal profile of the hydrogen/nitrogen flame as well as the response and noise of the detector at various heights above the jet.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 7

Record 8 1996-05-13

English

Subject field(s)
  • Analytical Chemistry
CONT

Kaye adapted a Beckman far-ultraviolet DK-2 spectrophotometer as a gas chromatographic effluent detector to record the spectra of eluted, absorbing materials. Using heated flow-through cells... coupled directly to the thermal conductivity cell' s outlet, he found that absorptivities of most organic vapors were sufficiently large to permit quantitative analysis, and in some instances identification, where specific absorption patterns could be attributed directly to a functional group in certain molecular species. Furthermore, the sensitivity of the far-ultraviolet detector for many compounds possessing intense absorption bands exceeds that of the normal thermal conductivity detector and, in some cases, the hydrogen flame ionization detector.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 8

Record 9 1996-03-08

English

Subject field(s)
  • Analytical Chemistry
CONT

This increase in electrical conductivity resulted from the release of sodium vapor from the probe. Using a two-stage flame detection system, one flame placed above the other but separated from it by a sodium hydroxide-treated wire mesh screen, hydrogen gas was added to the effluent of the column, and the carrier gas-air-hydrogen mixture was burned in the lower flame detector with its resulting electrical conductivity being the same as that of the usual flame detector.

French

Domaine(s)
  • Chimie analytique

Spanish

Save record 9

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