Short name:
GTHOS_HO2

Full name:
Ground-based Hydrogen Oxides Sensor reporting HO2 (Brune)

What is being measured:
Hydroperoxy radicals (HO2)

Sampling Protocol:
Online

Manufacturer:
Custom

Model:
Custom

Instrument year :
None specified

Data recording software:
Inquire with PI

Data analysis software:
Inquire with PI

Raw data time resolution:
Inquire with PI

Analysis data averaging:
Inquire with PI

Detection limit:
1.4e5 molec/cm3

Sensitivity to temperature (and correction method, if applicable): :
Inquire with PI

Sensitivity to relative humidity (and correction method, if applicable): :
Inquire with PI

Sampling method:
Direct sampling

Sample preparation method:
None

Sample residence time (chamber to instrument) (seconds):

Length of tubing (cm):
5

Instrument flow rate:
6 LPM

Tubing inner diameter:
Inquire with PI

Tubing material:
Stainless Steel

Chemical identification method:
HO2 is converted to OH by reaction with NO. Then OH is detected by Laser-Induced Fluorescence

Data analysis method:
Inquire with PI

Quantification method:
Applying the direct calibration factor for OH

Calibration method:
Producing known amounts of OH in a discharge flow tube, see Brune et al., J. Atmos. Sci., 1995

Calibration drift estimate:

Calibration schedule:

Uncertainty estimation method:
Total uncertainty based on calibration uncertainties

Known interferences:
Interference around instances of high biogenic activity that is temperature dependent (see Mao et al., ACP, 2012). This is corrected for by chemical zeroing.

Link to supplemental information:
https://journals.ametsoc.org/doi/pdf/10.1175/1520-0469%281995%29052%3C3328%3AMOAHIT%3E2.0.CO%3B2

Additional notes:
PI is William Brune from Penn State

Measurement uncertainty:

Measurement units: