GC-FID ch1. GC-MS. GC-FID ch2. Instrument. Appendix 3. Cape Verde VOC standards and QC/A . Species measured. C 2 -C 7 NMHC. O-VOCs, DMS, BTEX. Halocarbons, COS, BTEX. Benzene butane. DMS, BTEX. NMHC. involatiles. COS. halocarbons. DMS, OVOCS. Operational standard. NPL NMHC
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GC-FID ch1 GC-MS GC-FID ch2 Instrument Appendix 3. Cape Verde VOC standards and QC/A Species measured C2-C7 NMHC O-VOCs, DMS, BTEX Halocarbons, COS, BTEX Benzene butane DMS, BTEX NMHC involatiles COS halocarbons DMS, OVOCS Operational standard NPL NMHC standards Permeation sources DMS, BTEX, halocarbons CH3CN, OVOCs, CCl4 Bristol Halocarbon standards In air COS In air CCl4 BTEX NMHC OVOC NMHC All External Validation 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