1. Appendix 3. Cape Verde VOC standards and QC/A
GC-FID
ch1
GC-MS
GC-FID
ch2
Instrument
Species measured
C2-C7 NMHC
O-VOCs, DMS, BTEX
Halocarbons, COS, BTEX
Benzene
butane
DMS, BTEX
NMHC
DMS, OVOCS
involatiles
halocarbons
COS
Operational standard
NPL
NMHC
standards
Permeation sources
DMS, BTEX, halocarbons
CH3CN, OVOCs, CCl4
Bristol
Halocarbon
standards
In air
COS
In air
CCl4
BTEX
NMHC
External
Validation
NMHC
OVOC
All UK
NETCEN
EU wide
comparison
ACCENT
NIST traceable
weights
AGAGE
NASA,
NOAA
Others?
Apel Riemer
NCAR
UCI
AGAGE
others
NPL
Species for internal inter- instrument consistency
Species for operational standards internal consistency
External national and international validation of calibration