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Detection in the Air

What are the available instrumentations to measure in the air?

To measure nanoparticles in the air, two types of instrumentation exist: the specific instruments which analyze some particles or the totality. Among those, it needs to be distinguished counters and granulometers, transportable (monitors, samplers) or portable. The counters provide a global number of particles and the granulometers specify the size distribution. A global count of the particles will be less precise and will not permit the detection of small leaks. Measures may perform in real or deferred time.

Specific measurement protocol

223-mesure-specifiques-gb

Specific measures.

If the characteristics of the powders produced are known, one detects a possible contamination:

  • by a formal solution in a liquid environment of the particles collected, followed by a continuous analysis by chromatography,
  • by sampling on a filter, or in a liquid, of the particles suspended in the air for later analysis in the laboratory. The sample may be total (all particles are held on a single filter) or segmented (particles are selected according to their size class).