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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/amtd-2-237-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
04 Feb 2009
Review status
This discussion paper is a preprint. It has been under review for the journal Atmospheric Measurement Techniques (AMT). The revised manuscript was not accepted.
Determination of water-insoluble light absorbing matter in rainwater using polycarbonate membrane filters and photometric detection
J. E. Engström and C. Leck Department of Meteorology, Arrhenius Laboratory, Stockholm Univ., 10691 Stockholm, Sweden
Abstract. A method for determination of water-insoluble light absorbing matter in rainwater has been developed. After collection the rainwater samples were filtered using polycarbonate membrane filter in the laboratory. After drying the filter in filtered air, the amount of water-insoluble light absorbing matter (soot) on the filters was determined with photometry at a wavelength of 555 nm. The precision for the method was better than 10% calculated as relative standard deviation. The overall loss of soot due to adsorption during collection and filtration was 22±2%. The detection limit was estimated to 0.025 in optical density, or 2 ng/ml expressed as a concentration assuming a filtration volume of 30 ml. Analysis of environmental samples have been successfully performed with the described method at the Maldives Climate Observatory Hanimaadhoo and Nepal Climate Observatory. At Maldives the average soot concentration in rain was 0.048 μg/ml and at the Nepal obseravtory 0.086 μg/ml.

Citation: Engström, J. E. and Leck, C.: Determination of water-insoluble light absorbing matter in rainwater using polycarbonate membrane filters and photometric detection, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amtd-2-237-2009, 2009.
J. E. Engström and C. Leck
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC S41: 'uncertain application', Anonymous Referee #2, 22 Mar 2009 Printer-friendly Version 
 
RC S67: 'Review', Anonymous Referee #1, 01 Apr 2009 Printer-friendly Version 
 
AC S125: 'Author Comment', Erik Engström, 08 May 2009 Printer-friendly Version 
J. E. Engström and C. Leck
J. E. Engström and C. Leck

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