TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A radiation-counter tube in which an appropriate atmosphere is maintained by a flow of gas through the tube.  1, record 1, English, - gas%2Dflow%20counter%20tube

Record number: 1, Textual support number: 1 OBS

gas flow detector : term extracted from the “Glossaire de l'énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  5, record 1, English, - gas%2Dflow%20counter%20tube

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Tube-compteur de rayonnement dans lequel une atmosphère appropriée est maintenue par circulation lente d'un gaz dans l'enceinte.  3, record 1, French, - compteur%20%C3%A0%20flux%20gazeux

Record number: 1, Textual support number: 1 OBS

détecteur à circulation de gaz : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  3, record 1, French, - compteur%20%C3%A0%20flux%20gazeux

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A detector that measures the difference in thermal conductivity between two gas streams when a sample (gas mixture) passes through the sample channel.  6, record 2, English, - thermal%20conductivity%20detector

Record number: 2, Textual support number: 1 OBS

[It] is a dual channel detector, requiring a reference flow of pure carrier gas through the reference channel.  6, record 2, English, - thermal%20conductivity%20detector

Record number: 2, Textual support number: 2 OBS

The detector consists of a bridge circuit; the change in resistance in the sample channel during the passage of the sample produces an out-of-balance signal that is the basis of the detection. The detector responds to all components except the carrier gas and it is non-destructive.  6, record 2, English, - thermal%20conductivity%20detector

Record number: 2, Textual support number: 3 OBS

thermal conductivity detector; hot wire detector: terms and definition standardized by ISO in 2014.  7, record 2, English, - thermal%20conductivity%20detector

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Détecteur qui mesure la différence de conductivité thermique entre deux courants de gaz dont l’un (le mélange de gaz échantillon) passe par la voie d’échantillonnage.  3, record 2, French, - d%C3%A9tecteur%20%C3%A0%20conductivit%C3%A9%20thermique

Record number: 2, Textual support number: 1 OBS

[Il s'agit d']un détecteur à deux voies dont l’une, dite voie de référence, est réservée au flux de référence du gaz vecteur.  3, record 2, French, - d%C3%A9tecteur%20%C3%A0%20conductivit%C3%A9%20thermique

Record number: 2, Textual support number: 2 OBS

Le détecteur se compose d’un circuit en pont. La variation de résistance dans le canal d’échantillonnage pendant le passage de l’échantillon produit un déséquilibre du signal qui constitue le point de départ de la détection. Le détecteur, qui est non-destructif, répond à tous les constituants excepté le gaz vecteur.  3, record 2, French, - d%C3%A9tecteur%20%C3%A0%20conductivit%C3%A9%20thermique

Record number: 2, Textual support number: 3 OBS

détecteur à conductibilité thermique; détecteur à filament chaud : termes et définition normalisés par l'ISO en 2014.  8, record 2, French, - d%C3%A9tecteur%20%C3%A0%20conductivit%C3%A9%20thermique

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 OBS

... Winefordner et al. described a special, more sensitive cell based on changes in dielectric constant and constructed to allow gas flow between the plates of a capacitor which is a part of the tank circuit of a 70-Mc/sec Clapp oscillator, the output of which is beat against that of a reference oscillator. With the difference frequency between oscillators adjusted to zero with pure carrier gas flowing through the detector, the presence of a foreign vapor in the cell will produce a different frequency which is linearly related to the amount of material introduced through an injection port in the carrier gas stream and inversely proportional to the absolute temperature for a given component at a constant density or concentration in the cell and for a particular operating frequency.  2, record 3, English, - Clapp%20oscillator

Record number: 3, Textual support number: 1 PHR

Reference, sample Clapp oscillator.  3, record 3, English, - Clapp%20oscillator

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

Instrument used to monitor and quantify the products eluted from a chromatography column. Techniques used are based on the physical, chemical or biological properties of the molecules and may involve prior conversion by chemical or enzymic means to produce a coloured or fluorescent complex. Physical methods include the use of spectrophotometers, colorimeters, spectrophotofluorometers, refractometers, polarimeters, etc.  3, record 4, English, - chromatographic%20detector

Record number: 4, Textual support number: 1 CONT

Biological molecules may be monitored using enzyme-linked reactions specific for the required class of compound. Such detectors often include a flow cell so that the fluid passes continuously from the column through the detector. Several types of detector have been developed specifically for use with gas/liquid chromatographs. These include flame ionization and electron capture devices or, where information is required on the exact structure of the compounds, a mass spectrometer. Many are linked to microprocessors for control of the chromatographic analysis, as well as direct computation of results.  3, record 4, English, - chromatographic%20detector

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Appareil servant à déceler, à révéler la présence d'un corps dans un échantillon.  2, record 4, French, - d%C3%A9tecteur

Record number: 4, Textual support number: 1 CONT

Les détecteurs en chromatographie [...] mettent en évidence les constituants du mélange. Un bon détecteur doit être stable, sensible, linéaire, pratique d'emploi et ne doit pas altérer les séparations réalisées par la colonne.  2, record 4, French, - d%C3%A9tecteur

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A non-destructive detector which measures the frequency of a beat between two opposing ultrasonic vibrations placed at the outlets of a reference gas flow and the column gas flow respectively; the changes in frequency arising when solutes are eluted with the column gas stream are converted into a series of impulses corresponding to the solute concentrations.  2, record 5, English, - ultrasonic%20detector

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

ultrasonique : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).  3, record 5, French, - d%C3%A9tecteur%20ultrasonique

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Any regular change occurring in the baseline signal from the detector in g. c. [gas chromatography] or h. p. l. c. [high-performance liquid chromatography]. It commonly arises from changes in the flow rate of the mobile phase or from deterioration of the detector such as might occur if the stationary phase is bleeding off the column.  2, record 6, English, - baseline%20drift

Record number: 6, Textual support number: 1 OBS

[Detector drift] is represented as a continuous up-scale or down-scale excursion of the baseline, which tends to camouflage both noise and small peaks.  3, record 6, English, - baseline%20drift

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

Flame Emissivity Detector. Another detector based on monitoring a specific property of a flame, its emissivity, was developed by Grant, who mixed coal gas in constant proportions with the effluent from a chromatographic column; this coal gas/effluent mixture burned at a wide stainless steel jet. The emissivity of the flame, changing as the flame's carbon content is varied, is measured with the aid of a metal reflector, glass condensing lens, and selenium photocell; these are held in place from each other at their proper optical distances.... For low background emissivity values, response is nonlinear. However, by controlling the coal gas flow rate to maintain emissivity between 0. 60 and 0. 80 mV, detector response is linear over a wide temperature range.  1, record 7, English, - flame%20emissivity%20detector

Record number: 7, Textual support number: 1 OBS

For the determination of combustible components of organic origin in gas chromatographic effluents, various principles of detection based on flame reactions have been utilized, namely, the hydrogen flame temperature, flame emissivity, and flame ionization detectors. In all reported systems, specific flame properties were monitored. Whereas Scott measured the flame temperature of the exit gas at a small jet and Grant the flame’s emissivity by optical means, Mc William and Dewar and Harley et al. advanced new detection concepts based on the electrical or ionization properties of hydrogen/oxygen flames.  1, record 7, English, - flame%20emissivity%20detector

Record 7,  Textual support,  French

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

Guillemin et al., in their study of the influence of various operating parameters on the Gow-Mac detector, have shown that response is a function of(1) the nature of the carrier gas and(2) the ratio of the flow rates in the reference and measuring circuits...  1, record 8, English, - Gow%2DMac%20detector

Record 8,  Textual support,  French

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 CONT

Semiconductive Thin Film Detector. Using the known principle that the adsorption and desorption of gases cause a change in electrical conductivity of semiconductors, Seiyama et al. developed a new chromatographic detector for gaseous components.... The current, depending upon the resistance of the film, is converted to voltage by the variable resistance, which is fed without amplification to a recorder. Resistance also adjusts the input voltage of the recorder at desired sensitivity. Using zinc oxide as an example of a typical film material, the conductivity of its film maintains a fixed value when the nitrogen carrier gas is passed at a constant flow rate throught the borosilicate glass tube. When a small amount of another gas or vapor is added to the carrier gas, its conductivity is changed.  1, record 9, English, - semiconductive%20thin%20film%20detector

Record 9,  Textual support,  French

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

Thermionic or Electron Impact Detector. In 1957, Ryce and Bryce described a sensitive ionization gauge based on the ionization potentials of vapors. It comprised a filament, a grid, and a plate. The potential difference between the filament and grid accelerated electrons which may ionize any gas in their path. If the grid potential is maintained at a level insufficient to ionize the helium carrier gas... no current flows in the plate circuit. If a potential difference of 18 V is maintained between the filament and the grid, compounds of lower ionization potential in the helium will be ionized and the positive ions produced will yield a cathode current, the current noted being a measure of the ion concentration. Into the modified ionizing chamber, operated at reduced pressure, a small fraction of the column effluent gas stream(less than 0. 5%) was allowed to flow into the gauge through a controlled leak. Over a 0. 02-l. 5 mm Hg pressure range, the sensitivity was approximately proportional to the pressure, and sensitivities in the range of 10[ minus superscript 12] mole were claimed.  1, record 10, English, - electron%20impact%20detector

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish