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SOLID PHASE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2005-04-13

English

Subject field(s)
  • Combustion and Fuels (Fireplaces)
  • Fires and Explosions
  • Fire Detection
CONT

Combustion actually consists of three more or less distinct but overlapping phases: Preheating Phase ... Distillation or Gaseous Phase. ... Charcoal or Solid Phase - The presence of combustible vapours above the fuel is too low to support a persistent flame. The residual solid fuel or char burns away slowly.

French

Domaine(s)
  • Combustion et combustibles (Foyers)
  • Feux et explosions
  • Détection des incendies
OBS

Comportement du feu. [...] La première étape est le préchauffage [...] La deuxième étape comprend la volatilisation continue des gaz [...] La troisième étape du processus de combustion est l'incandescence. Le charbon qui reste après la seconde étape brûle avec une combustion couvante et laisse une petite quantité de cendres résiduelles.

Spanish

Save record 1

Record 2 2002-03-21

English

Subject field(s)
  • Analytical Chemistry
CONT

The mass transfer term is influenced by the partition coefficient and, therefore, by the relative solubility of the sample in the liquid phase (i.e, by the type and amount of liquid phase as well as the temperature). Or, in the case of gas-solid chromatography, it is influenced by the adsorbability of the solute on the solid phase.

OBS

Traditionally, in partition chromatography, the solid particles were deposited upon the liquid stationary phase ... this meaning must now be extended to include the inside surfaces of capillary columns.

OBS

In liquid-liquid partition TLC [thin-layer chromatography] the solid sorbent for the stationary phase is sometimes known as the carrier rather than as the support.

OBS

There are two main groups of supports: diatomaceous earths and nondiatomites. The former group includes celite, firebrick and kieselguhr while the latter includes carbon, detergents, polymers, glass beads and silica gel.

Key term(s)
  • carrier

French

Domaine(s)
  • Chimie analytique
DEF

Vecteur, liquide ou gazeux, qui déplace le soluté.

OBS

Les supports sont presque toujours des matériaux à base de silice (silice ou diatomite), dont les pores ont un diamètre de l'ordre de 0,1 à 1[mu]m et la surface spécifique une valeur de 0,3 à 10 m²/g.

OBS

Normalement un solide inerte, poreux, qui adsorbe la phase liquide. Le domaine de la granulométrie du support intervient sur l'efficacité de la colonne et sur la différence de pression nécessaire à l'obtention d'un débit gazeux donné. Dans le cas de séparations spéciales, on a modifié la méthode en remplaçant le support solide inerte par un solide actif. Dans les colonnes capillaires, la paroi interne de la colonne joue le rôle de support solide, ce qui élimine les solides poreux.

PHR

Mise en suspension, site actif du support solide.

PHR

Support solide entièrement poreux, pelliculaire.

Key term(s)
  • support de chromatographie

Spanish

Campo(s) temático(s)
  • Química analítica
Save record 2

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