Artefacts in the sampling of nitrate studied in the "INTERCOMP" campaigns of EUROTRAC-AEROSOL

被引:108
作者
Schaap, M
Spindler, G
Schulz, M
Acker, K
Maenhaut, W
Berner, A
Wieprecht, W
Streit, N
Müller, K
Brüggemann, E
Chi, X
Putaud, JP
Hitzenberger, R
Puxbaum, H
Baltensperger, U
ten Brink, H
机构
[1] Univ Utrecht, Inst Marine & Atmospher Sci, IMAU, NL-3508 TA Utrecht, Netherlands
[2] Leibniz Inst Tropospharenforsch eV, Leipzig, Germany
[3] Lab Sci Climat & Environm, Gif Sur Yvette, France
[4] BTU, Berlin, Germany
[5] Univ Ghent, Inst Nucl Sci, B-9000 Ghent, Belgium
[6] Univ Vienna, Inst Expt Phys, Vienna, Austria
[7] Paul Scherrer Inst, Villigen, Switzerland
[8] Joint Res Ctr, I-21020 Ispra, Italy
[9] Vienna Univ Technol, Inst Chem Technol & Analyt, Vienna, Austria
[10] Energy Res Ctr Netherlands, ECN, Petten, Netherlands
关键词
nitrate; evaporation; adsorption; filter type; temperature dependence;
D O I
10.1016/j.atmosenv.2004.08.026
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Sampling of aerosol-nitrate can be problematic because of evaporative loss of the semi-volatile ammonium nitrate or adsorption of nitric acid gas. Such artefacts, which depend on filter type and ambient conditions, are not well documented for the filters in use in Europe and this was the reason to study these in a series of intercomparison trials. The trials were performed within the "INTERCOMP" programme of the AEROSOL subproject of EUROTRAC-2. The major effort was a 2-week field campaign at the rural site of Melpitz, a village near Leipzig in eastern Germany (INTERCOMP2000). Samplers were used containing the most common filter types in use in Europe, i.e. quartz, Teflon, (mixed) cellulose ester and cellulose. The concentration of nitrate in PM2.5, mainly present as ammonium nitrate, was on average 3.3 mugm(-3). The variability in the concentrations stemming from the samplers appeared to be rather constant: +/- 0.5 mugm(-3) from the average of all samplers. The reason for the constant (but random) variability remains unexplained. Thus, the concentrations stemming from the samplers agreed very well at the average level with relative differences of 15% and less for higher concentrations. This is evidence that the influence of the mentioned artefacts was negligible. The absence is explained by extrapolation of results of tests on the artefacts in a laboratory setting (INTERCOMP99). It was found there that the loss of ammonium nitrate from Teflon and quartz filters is only substantial when temperatures are much higher than those during the field campaign. Cellulose and cellulose-acetate filters quantitatively collected both ammonium nitrate and nitric acid in the laboratory study, but in Melpitz measured nitric acid concentrations were too low to identify its adsorption. Possible artefacts due to adsorption of nitrous acid were negligible. We also used the laboratory information to evaluate the results of a further intercomparison (INTERCOMP98) in the Po-Valley, performed at much higher temperatures than at Melpitz. We found evidence of adsorption of nitric acid by cellulose filters and evaporational loss of aerosol-nitrate from quartz filters. For the conditions encountered during the campaign we parameterised the evaporational loss in a general way as a function of temperature, as follows. There is complete evaporation at temperatures exceeding 25degreesC and full retention at temperatures less than 20degreesC. At temperatures between 20 and 25degreesC the retention is on average 50%, but with high variability. A main conclusion from this study is that under central European conditions quartz is a suitable filter material for sampling nitrate as long as the temperature does not exceed 20degreesC during sampling. Cellulose-type filters quantitatively collect aerosol nitrate and nitric acid, but negligible amounts of nitrous acid. Teflon filters were more vulnerable for evaporation losses than quartz. Indications for losses from Teflon below 10degreesC (at Melpitz) were not obtained.(C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:6487 / 6496
页数:10
相关论文
共 30 条
[1]   INTERFERENCE EFFECTS IN SAMPLING PARTICULATE NITRATE IN AMBIENT AIR [J].
APPEL, BR ;
WALL, SM ;
TOKIWA, Y ;
HAIK, M .
ATMOSPHERIC ENVIRONMENT, 1979, 13 (02) :319-325
[2]   Urban and rural aerosol characterization of summer smog events during the PIPAPO field campaign in Milan, Italy -: art. no. 8193 [J].
Baltensperger, U ;
Streit, N ;
Weingartner, E ;
Nyeki, S ;
Prévôt, ASH ;
Van Dingenen, R ;
Virkkula, A ;
Putaud, JP ;
Even, A ;
ten Brink, H ;
Blatter, A ;
Neftel, A ;
Gäggeler, HW .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2002, 107 (D22)
[3]  
BEHLEN A, 1996, SCHRIFTENREIHE ANGEW, V29
[4]  
Berner A., 1998, Contributions to Atmospheric Physics, V71, P101
[5]   SIZE DISTRIBUTION OF THE URBAN AEROSOL IN VIENNA [J].
BERNER, A ;
LURZER, C ;
POHL, F ;
PREINING, O ;
WAGNER, P .
SCIENCE OF THE TOTAL ENVIRONMENT, 1979, 13 (03) :245-261
[6]   Changes of some components of precipitation in East Germany after the unification [J].
Brueggemann, E ;
Rolle, W .
WATER AIR AND SOIL POLLUTION, 1998, 107 (1-4) :1-23
[7]  
BRUGGEMANN E, 2000, K ID ANT VERSCH QUEL
[8]   MEASUREMENT METHODS TO DETERMINE COMPLIANCE WITH AMBIENT AIR-QUALITY STANDARDS FOR SUSPENDED PARTICLES [J].
CHOW, JC .
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 1995, 45 (05) :320-382
[9]   COMPARISON OF ANNULAR DENUDERS AND FILTER PACKS FOR ATMOSPHERIC SAMPLING [J].
DASCH, JM ;
CADLE, SH ;
KENNEDY, KG ;
MULAWA, PA .
ATMOSPHERIC ENVIRONMENT, 1989, 23 (12) :2775-2782
[10]   COMPARISON OF 6 DENUDER METHODS AND A FILTER PACK FOR THE COLLECTION OF AMBIENT HNO3(G), HNO2(G), AND SO2(G) IN THE 1985 NSMC STUDY [J].
EATOUGH, NL ;
MCGREGOR, S ;
LEWIS, EA ;
EATOUGH, DJ ;
HUANG, AA ;
ELLIS, EC .
ATMOSPHERIC ENVIRONMENT, 1988, 22 (08) :1601-1618