3.
Results
3.1.
Concentrations
in
air
and
quartz
contents
of
organic
BPs
The
short-time
exposure
concentrations
of
organic
BPs
in
air
are
listed
in
Table
1.
The
concentrations
of
organic
BPs
in
air
in exposure
group
I
was
12.73
±
1.42
mg/m3,
which
was
significantly
higher
than
in
exposure
group
II
(7.73
±
0.81
mg/m3,
P
<
0.01).
All
measured
concentrations
of
organic
BPs
for
two
exposure
groups
were
greater
than
the
permissible
concentration
short
term
expo-
sure
limit
(PC-STEL)
of
BPs
in
China
(6
mg/m3).
The
quartz
contents
of
organic
BPs
from
the
two
factories
were
similar
(6.3
and
6.5%,
respectively).