Liquid Supply And Drain Bottles - BRECHTEL 4001-115V Instrument Manual

6.4 Liquid Supply and Drain Bottles

fully inserted and before inserting the metal clamping plate that squeezes the O-ring. If
the impactor plate is inserted more deeply into the impactor housing, the wick will be
damaged.
The debubbler removes air bubbles from the liquid sample flow drawn from the PILS.
Periodic cleaning of the debubbler and replacement of the porous teflon membrane is
recommended. Spare membranes can be purchased from BRECHTEL .
6.4 Liquid Supply and Drain Bottles
There are two 1000 ml liquid supply polyethylene bottles used in the PILS (see figure 10).
One bottle is used to store the MilliQ water with LiF or LiBr internal standard and supplies
the peristaltic pump impactor wash flow channel. The second bottle is used to hold pure
MilliQ water for the steam generation system (labelled "Pure H2O"). A third 1 liter bottle
is used to collect waste liquid from the PILS (labelled Drain bottle). The steam generation
system operates at a nominal flow rate of 1.5 ml/min. The peristaltic pump draws water
from the bottle and pumps it through the steam generation system. The liquid supply
bottles supplied with the PILS may be replaced with larger volume containers as long
as the required high water purity is maintained. It is the users responsibility to verify
background concentrations in the water used to operate the PILS.
The MilliQ water used in the washflow should be spiked with either LiF or LiBr as an in-
ternal standard so that evaporative loss or condensational dilution of water vapor during
droplet collection inside the PILS can be corrected for during data processing. Typical
concentrations of the internal standard are between 50 and 200 ppb, however, the user
should adjust the concentration to match the anticipated liquid sample concentration
range of the PILS samples. Note that the response of the chemical detection system that
will be used to analyze the PILS liquid samples must be characterized for the internal
standard species as well as the species analyzed in the actual samples.
83-00009-01A PILS 4001-115V and 4001-230V Page 27 of 74