Site Description
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Transcript of Site Description
Site Description
October 18 to November 5, 2004 for continuous hourly measurements.
October 16 to November 11, 2004 for 24 flask samples collecting.
Instrumentation
Dual sorbent trap, dual column,
dual detector (FID), Agilent 6890 GC
Dual sorbent trap, dual column,
dual detector (FID), Agilent 6890 GC
SystemSystem
PLOT : Al2O3/KCl(30m x 0.32mm, df=8µm)
DB-1 (J&W, USA)
PLOT : Al2O3/KCl(30m x 0.32mm, df=8µm)
DB-1 (J&W, USA)
ColumnColumn
Calibration was performed before
and after the campaign by 50 species.
Calibration was performed before
and after the campaign by 50 species.
CalibrationCalibration
Result and Discussion
VOC Comparison and LPG car exhaust
LPG alkane:propane
iso-butanen-butane
In-situ : 24%Canister : 27%
R2 = 0.9High coherence
In Taipei, RIn Taipei, R22 = 0.3 = 0.3
RR22 = 0.9 = 0.9
Effect of LPG vehicles on OFP
LPG is a better choice LPG is a better choice
of fuel than gasoline becauseof fuel than gasoline because
of its low OFP.of its low OFP.
Conclusion
LPG is the major source of VOC in downtown Guangzhou.
The synchronicity of LPG alkanes
with NO and propylene suggest
LPG linked to vehicular exhaust.
The LPG alkanes accounts for 24% of TVOC in Guangzhou,
its contribution to OFP only 7%.
LPG emissions are increasing in morning and evening rush hlurs, as well the nootime break.