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Korea Research Institute of Standards and Science
What leads to “particulate” researches in KRISS
Sangil Lee Center for Gas Analysis
Korea Research Institute of Standards and Science
Particulate Workshop in CCQM GAWG April 15, 2015
BIPM
Korea Research Institute of Standards and Science
Regulations for Particulate Matter in Korea
• Ambient air quality standards for PM10 & PM2.5 – mass-based standards μg/m3
• Emission standards for diesel vehicles
– mass-based standards for vehicles prior to 2014 g/km or g/kWh
– mass/number-based standards for vehicles since 2014 g/km or g/kWh, #/km or #/kWh
Korea Research Institute of Standards and Science
Ambient Air Quality Monitoring Network
Species Traceability
CO CRMs
NO2 CRMs
SO2 CRMs
O3 KRISS O3 SRP
PM10 -
PM2.5 -
More than 300 monitoring sites Ambient air quality standards
Nonattainment occurrence
Korea Research Institute of Standards and Science
Reference Methods for Ambient PM Measurement
Reference method Continuous measurement (for non-/attainment & PM warning)
PM10 Beta ray attenuation Beta ray attenuation
PM2.5 Filter sampling/Gravimetry Beta ray attenuation
Korea Research Institute of Standards and Science
Ambient PM Measurement
classify PM size: collection efficiency
determine mass: traceability
Beta ray attenuation PM monitor
Korea Research Institute of Standards and Science
Evaluation of PM Size Classifiers
(Lee et al., 2013) KRISS Aerosol Wind Tunnel
Col
lect
ion
effic
ienc
y (%
)
Korea Research Institute of Standards and Science
Harmonizing Continuous PM Measurement
Reference PM monitor Mass absorption
coefficient (μ)
Reference films
Reference films certified (CRFs) by Reference PM
monitor Uncertainty analysis QA/QC with CRFs for
ambient PM monitors
Korea Research Institute of Standards and Science
Harmonizing Continuous PM Mass Measurement
1. Weigh a blank filter 2. Load the filter into the reference PM monitor 3. Collect particles on the filter 4. Weigh the sampled filter
Blank filters
Sample filters
Slope = μ
Reference films
Derive mass absorption coefficient and certify reference films
Korea Research Institute of Standards and Science
Harmonizing Continuous PM Mass Measurement
Certify reference films (areal mass) with the reference PM monitor
Uncertainty of Certified Reference Films
Uncertainty analysis
Korea Research Institute of Standards and Science
Organic Carbon, Elemental Carbon (or Black Carbon)
Ions 41%
OC, EC 38%
Soils, Metals
21%
PM2.5 Composition
OC/EC determined by thermal optical method - operational definition
Harmonize OC/EC (BC) data - develop standardized analysis protocols (on-going) - develop filter-based OC/EC reference materials - develop reference materials for elemental/black carbons
(Ho et al., 2010)
Korea Research Institute of Standards and Science
Particle Number Concentration Measurement
(Kittelson, 1998)
Calibration needed for automobile industries and aerosol research communities
(Buzea et al., 2007)
• Automobile emission regulations • Health studies
• Particle formation and growth
(Kumala et al., 2012)
Korea Research Institute of Standards and Science
Thank you for your attention