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6 PILS Overview
6.1 Description
The Particle into Liquid Sampler (PILS) is used to measure the chemical composition
of water-soluble components of the ambient aerosol. Brechtel has integrated the PILS
droplet impactor and steam generator systems into a complete aerosol sampling system
that can be operated autonomously. The PILS has been extensively tested and a sum-
mary of the tests and historical field data may be found in the paper by Sorooshian et al.,
2006, Aerosol Science & Technology, 40: 396-409 and other references. The PILS can
be directly connected to a user-supplied Ion Chromatography (IC) system, Total Organic
Carbon (TOC) analyzer, an Optical Waveguide, or other analytical systems to provide on-
line composition measurements. Alternatively, the Auto-collector produced by Brechtel
may be used with the PILS to allow liquid sample collection into vials.
The major components of the complete PILS system are shown in figure 2 and include:
1. a steam generation system to produce and inject steam into the condensation
chamber,
2. the condensation chamber and droplet impactor for growing sampled particles
into collectable droplets and collecting them on the quartz impactor plate,
3. a peristaltic pump to supply liquid to the steam generator, provide the impactor
washflow and liquid sample flow, and handle waste liquid,
4. a debubbler to remove air from the liquid sample flow,
5. a critical orifice to maintain constant sample air flow,
83-00009-01A
PILS 4001-115V and 4001-230V
6
PILS Overview
Figure 2: Photo of the PILS.
Shown with Auto-collector
and PC.
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