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INSTANTANEOUS SAMPLING [2 records]

Record 1 2004-02-16

English

Subject field(s)
  • Environmental Studies and Analyses
  • Air Pollution
DEF

An atmospheric analysis method involving manual collection of air in evacuated containers such as glass flasks and stainless-steel bottles.

OBS

The containers are pumped down in the laboratory and then carried to the field, where the sample is instantaneously collected by merely opening a valve. The vessels containing the gaseous samples are then brought back to the laboratory for analysis.

French

Domaine(s)
  • Études et analyses environnementales
  • Pollution de l'air
CONT

Méthodes de mesure et de contrôle de la pollution de l'air [...]. Échantillonnages instantanés. Dans certains cas, il peut être intéressant de capter des «bouffées d'air pollué». Suivant les cas, on utilisera des flacons de verre ou des enveloppes en caoutchouc ou en matière plastique. L'air aspiré dans le flacon ou le ballon peut être ramené en laboratoire et analysé si les concentrations de polluants sont suffisantes.

OBS

«Prélèvement» sous-entend «prélèvement d'échantillons».

Spanish

Save record 1

Record 2 1975-03-11

English

Subject field(s)
  • Work Study
  • Operations Research and Management
OBS

--a work study sampling technique in which a large number of planned instantaneous observations is made over a given period of time of a group of machines, processes or workers.

French

Domaine(s)
  • Étude du travail
  • Recherche et gestion opérationnelles
OBS

--utilisation d'un échantillonnage simple, au hasard pour estimer la proportion du temps passé entre diverses activités par des exécutants ou des équipements.

Spanish

Save record 2

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