Introduction
Partisol 2000i-D Configuration
1-12
Partisol 2000
i
and Partisol 2000
i
-D Instruction Manual
Thermo Fisher Scientific
particles using the anisokinetic sampling theory. Simply stated, the 16.7
L/min total air flow is split into a 1.67 L/min
coarse
fraction flow and 15
L/min
fine
fraction flow (
Figure 1–3
). This mismatch in flow rates allows the
coarse
particle fraction to follow the straight path of the minor (1.67 L/min)
flow, while the
fine
particle fraction follows both the minor and major (15
L/min) flow paths.
The Dichotomous Partisol Sampler maintains the two constant volumetric
flow rates (15.0 L/min and 1.67 L/min), and automatically determines the
sampled volumes (m³) in volumetric and standard terms for each filter
exposed, and stores this information internally for later viewing or
downloading.
Three formulas are required for the mass concentration ( g/m³) computation
of
fine
PM (PM
2.5
),
coarse
PM (PM
10
minus PM
2.5
), and PM
10
:
For
fine
PM:
For
coarse
PM:
For PM
10
(in volumetric terms):
To calculate the PM-10 value in standard terms:
The symbols in equations (1), (2), and (3) represent:
C
f
= mass concentration [ g/m³] of
fine
particle fraction
C
c
= mass concentration [ g/m³] of
coarse
particle fraction
C
t
= mass concentration [ g/m³] of PM-10
std
t
c
f
std
t
V
M
M
C
