Central California Ozone Study (CCOS) - Desert Research Institute
Central California Ozone Study (CCOS) - Desert Research Institute
Central California Ozone Study (CCOS) - Desert Research Institute
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<strong>CCOS</strong> Field Operations Plan Version 2: 5/31/00<br />
Table 2.4-2<br />
Detection Limits, Ranges, and Averaging Times for <strong>CCOS</strong> Supplemental Measurements<br />
Observable<br />
Method (Instrument)<br />
Expected 1 s<br />
Precision<br />
Detection Limit Range Averaging or Samplng Time<br />
O 3 UV absorption (API 400A) ± 10% 0.6 ppb 500 ppb 1 minute, 5 minutes, and 1 hour<br />
NO/NOy<br />
NOy/NOy*<br />
chemiluminescence (TEI 42C TL with<br />
external converter)<br />
chemiluminescence (TEI 42C TL with dual<br />
external converters and HNO3 denuder)<br />
± 10% 0.1 ppb 500 ppb 1 minute, 5 minutes, and 1 hour<br />
± 10% 0.1 ppb 500 ppb 1 minute, 5 minutes, and 1 hour<br />
NO/NOx chemiluminescence (TEI 42C TL) ± 10% 0.1 ppb 500 ppb 1 minute, 5 minutes, and 1 hour<br />
CO infrared gas filter correlation (TEI 48C TL) ± 10% 0.04 ppm 10 ppm 1 minute, 5 minutes, and 1 hour<br />
CO 2 infrared gas filter correlation (TEI 41C HL) ± 10% 0.1 ppm 1000 ppm 1 minute, 5 minutes, and 1 hour<br />
NO 2<br />
, PAN and PAcNs chemiluminescence and luminol (CE-CERT) ± 20% 1 ppb 500 ppb One instantaneous sample every 5<br />
minutes<br />
HCHO<br />
dihydrolutidine derivative fluorescence<br />
(Alpha-Omega MA-100)<br />
± 20% 0.5 ppb 50 ppbv One 3 minute sample and 7<br />
minute zero every 10 minutes<br />
PM 2.5<br />
nitrate flash volatilization (R&P) ± 15% 0.1 µg/m3 100 µg/m3 10 minutes and 1 hour<br />
Light scattering nephelometers (Radiance <strong>Research</strong> M903) ± 10% 1 Mm-1 200 Mm-1 5 minutes and 1 hour<br />
Light absorption<br />
aethalometers (Andersen RTAA-1000, ± 5 to 20% 35 ng (black 1000 µg (black 5 minutes and 1 hour<br />
Magee Scientific AE31)<br />
carbon)/m3 carbon)/m3<br />
Actinic flux (280-700 nm) spectro radiometer (Metcon 2-pi diode array<br />
spectrometer)<br />
± 0.1% flux,<br />
± 2.5 nm λ<br />
1 % of full scale<br />
W/cm2/sec/nm<br />
1000 W/m2 for<br />
entire λ range<br />
10 sec, 5 minutes, 1 hour<br />
averages in 512 λ bins<br />
C 2<br />
-C 12<br />
hydrocarbons and<br />
oxygenated organic compounds<br />
C 2<br />
-C 12<br />
hydrocarbons from<br />
canisters<br />
C 8<br />
-C 20<br />
hydrocarbons from<br />
Tenax cartridges<br />
automated GC/MS (Varian 3800 GC/ Saturn<br />
2000 Ion Trap MS with Entech 7100<br />
preconcentrator)<br />
gas chromatography with flame ionization<br />
detection<br />
thermal desorption into GC with FID or<br />
MSD (HP 5890 GC with HP 5970 MSD)<br />
± 10% 0.2 ppbC 100 ppbC for<br />
individual HC<br />
± 10% 0.2 ppbC 100 ppbC for<br />
individual HC<br />
± 10% 0.2 µg/m3 50 µg/m3 for<br />
individual species<br />
One hour<br />
One three hour sample four times<br />
on intensive period days<br />
One three hour sample four times<br />
on intensive period days<br />
C 1<br />
-C 7<br />
carbonyls from DNPH<br />
cartridges<br />
HPLC with UV detection ± 10% 0.2 ppbv 50 ppbv per<br />
compound<br />
One three hour sample four times<br />
on intensive period day<br />
Wind speed anemometer ± 0.3 m/s 0.3 m/s 44.7 m/s 5 minutes and 1 hour<br />
Wind direction wind vane ± 10° from North 1 degree 0 to 360 5 minutes and 1 hour<br />
Temperature platinum resistance or thermister ±0.1 °C 0.1 °C -30 to 50 °C 5 minutes and 1 hour<br />
Relative humidity capacitance ±2% 100% 5 minutes and 1 hour<br />
Chapter 2: FIELD MEASUREMENTS 2-15
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