Campaign
Valencia, EUPHORE (CEAM Foundation), 2011.06.23 - 2011.07.06
Program:
The scenario of this campaign has comprised a set of experiments simulating typical urban and semi-rural conditions. In this regard, the following topics were proposed to be addressed:
- Intercomparison of techniques. A study of interferences will be conducted, investigating the impacts that the presence of potential interferants (i.e. seed aerosol, water vapour, NOx, short chain carbonyls and ozone) in the sample matrix, has on measurement. In addition, an experiment will be conducted in which diesel soot will be introduced as seed aerosols and GLY and MGLY will be added directly to the chamber or produced in-situ by reaction of OH with acetylene or propyne, respectively. The gas and aerosol phase evolution/composition will be monitored simultaneously.
- Sources of a-dicarbonyl compounds - photooxidation of isoprene. The primary and secondary yields of GLY and MGLY and other co-products such as methyl vinyl ketone and methacrolein will be determined under different experimental conditions (isoprene/NOx=134-380 ppt/5-60 ppb, relative humidity = 0, 25, 50%) in order to evaluate whether isoprene photooxidation is an important source of dicarbonyls under typical urban and semi-rural conditions.
The following instruments were installed and used during this campaign apart from other instrumentation already in place in EUPHORE:
Table 1. List of the instruments that will be used during intercomparisonInstrument | Participant | Species |
---|---|---|
ATOFMS (Aerosol Time of Flight Mass Spectrometry) | Dr Maria Teresa Baeza and Dr Andrew Rickard, University of Leeds, UK | On line analysis of size and composition of aerosols |
Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR-MS), liquid chromatography-ion trap mass spectrometry (LC-MSn) | Dr Jacqueline Hamilton, University of York, UK | Off line analysis of aerosol composition |
Blue LED-CE-DOAS instrument | Prof Rainer Volkamer, University of Colorado, US | GLY, MGLY in gas phase |
Real time chemical ionization MS system (CIRTOFMS) | Prof Paul Monks, University of Leicester, UK | GLY, MGLY, MACR + MVK in gas phase |
Long-path DOAS | CEAM, Spain | GLY/MGLY in gas phase |
SPME technique is used with GC and GC/MS | CEAM, Spain | GLY /MGLY in gas phase |
Fourier Transform Infrarred (FTIR) | CEAM, Spain | GLY/MGLY in gas phase |
Gas Chromatography-(GC-PAN) | CEAM, Spain | MGLY |
Broadband cavity enhanced absorption spectroscopy (BBCEAS technique) | Prof , Steve Ball, University of Leicester, UK | GLY in gas phase |
Laser induced phosphorescence (LIP) | Prof Frank Keutsch, University of Wisconsin, US | GLY and MGLY in gas phase |
The experiments described in Table 2 were carried out during this campaign:
Table 2. List of experiments carried out during alfa-dicarbonyl intercomparison campaignDate | Name of the experiment | Objective | Brief description of the experiment |
---|---|---|---|
24/06/2011 | GLY intercomparison open | 1 | GLY freshly synthetysed were introduced in the chamber in high concentration (~40 ppb) and all the instruments started to measure, several dilutions were done until reach the range of tens of ppt |
27/06/2011 | MGLY intercomparison open | 1 | MGLY freshly synthetysed were introduced in the chamber in high concentration (~25 ppb) and all the instruments started to measure, several dilutions were done until reach the range of hundred ppt |
28/06/2011 | O3 + o-xylene. Open | 1,2 | GLY and MGLY were generated in situ and in the presence of O3. Cross interference GLY and MGLY. Interference of O3. Check of time resolution of different instruments. |
29/06/2011 | Isoprene. NOx control. Blind | 2 | Formation of GLY, MGLY and other producst like methylvinylketone was monitored when isoprene was added in the presence of a controlled amount of NOx. In this experiment the NOx control failed. |
30/06/2011 | O3+C2H2. Blind | 1,2 | Formation of GLY and MGLY from this reaction was monitored in the presence of high concentrations of ozone. |
01/07/2011 | Ambient air. Blind | 1 | Ambient air was introduced in the chamber |
04/07/2011 | Isoprene. NOx control. Blind | 2 | A repetition of the experiment carried out on 29/06/2011 but this time with a good control of NOx. |
05/07/2011 | GLY intercomparison. Blind | 1 | A repetition of the experiment carried oun on 24/06/2011 but this time it was a blind experiment. NO2 was added to check the effect of this interferant. |
06/07/2011 | MGLY intercomparison. Blind | 1 | A repetition of the experiment carried oun on 27/06/2011 but this time it was a blind experiment. NO2 was added to check the effect of this interferant. |
NOTE: Open were experiments where different participants share their data while blind experiments where those where not sharing of data happened.
The first 3 experiments were set up as informal intercomparison and the rest of the experiments will be part of the formal intercomparison. In any case, it was agreed that, for a better dissemination of data, the results would be introduced in the EUROCHAMP database, therefore the data would be provided in text format (EDF).
Set up:
You can see some photographs.Organizers:
- Maria Teresa Baeza Romero
- Andrew Rickard
Local organizers:
- Amalia Muñoz
- Teresa Vera
- Mónica Vázquez
Experts committee:
- Andrew Rickard, University of Leeds, UK
- Stephen Ball, University of Leicester, UK
- Rainer Volkamer, University of Colorado, US
- Frank Keutsch, University of Winsconsin, US
- Amalia Muñoz, CEAM Foundation, Spain
- Maria Teresa Baeza Romero, Universidad de Castilla la Mancha, Spain
Technical support (campaign preparation):
- Amalia Muñoz
Technical support (during experiments):
EUPHORE staff- Teresa Vera
- Mila Ródenas
- Paco Alacreu
- Amalia Muñoz
- Mónica Vázquez
- Esther Borrás
- Pilar Sánchez
- Joaquín Valero
- Montse Raro
- Asier Ibáñez
- Marta Monteagudo
Referee:
- Maria Teresa Baeza Romero (mariateresa.baeza@ uclm.es), Universidad de Castilla la Mancha
Modelling:
- Andrew Rickard, University of Leeds
Participants:
Instrument | Institution | Person |
---|---|---|
Blue LED-CE-DOAS instrument | University of Colorado | Volkamer, Rainer |
Thalman, Ryan | ||
BBCEAS | Univ. Leicester | Ball, Stephen |
Daniels, Mark | ||
DOAS | CEAM Foundation | Ródenas, Mila |
CIRTOFMS | University of Leicester | Goodall, Iain |
LIP | University of Winsconsin | Keutsch, Frank |
Henry, Samuel | ||
FTIR | CEAM Foundation | Ródenas, Mila |
SPME technique is used with GC and GC/MS | CEAM Foundation | Sánchez, Pilar |
Complementary instrumentation:
Instrument | Institution | Person |
---|---|---|
ATOFMS | University of Leeds | Baeza Romero, Maria Teresa |
Peppe, Salvatore | ||
FT-ICR-MS and LC-MSn | University of York | Hamilton, Jacqueline |
Finessi, Emanuela | ||
HCHO | CEAM Foundation | Muñoz, Amalia |
SMPS | CEAM Foundation | Borrás, Esther |
DNPH cartridges - LC/MS | CEAM Foundation | Vera, Teresa |
O3 Monitor | CEAM Foundation | Vázquez, Mónica |
NO/NO2 Monitor | ||
J(NO2) Monitor | ||
CO Monitor | ||
SO2 Monitor | ||
Metcon 2-PI Spectroradiometer Spectral Radiometry | University of Leicester | Goodall, Iain |
Rickard, Andrew | ||
TEOM | University of Leeds | Peppe, Salvatore |
Supported by
CEAM Foundation, supported by Generalitat Valenciana