National Repository of Grey Literature 8 records found  Search took 0.00 seconds. 
The study of influence of atmospheric pollutants on the determination of nitrous acid with the preconcentration in the cylindrical wet diffusion denuder
Motyka, Kamil ; Večeřa, Zbyněk ; Mikuška, Pavel
The effect of pollutants which commonly occur in polluted air on the chemiluminescent determination of nitrous acid with preconcentration in cylindrical wet diffusion denuder was investigated.
Application of difusion denuder for sampling of carbonaceous aerosols and analysis of OC/EC
Mikuška, Pavel ; Večeřa, Zbyněk ; Bartošíková, Anna ; Maenhaut, W. ; Chi, X.
Annular diffusion denuder for sampling of carbonaceous aerosols on quartz filter without interferences of gaseous organic pollutants and atmospheric oxidants is described. Exposed filters are analysed off-line for content of orgnic and elementar carbon in collected aerosols.
Continuous measurement of chemical composition of atmospheric aerosols
Mikuška, Pavel ; Večeřa, Zbyněk
New continuous collector of atmospheric aerosols using deionized water is described.Collector allows on-line analysis of chemical composition in water soluble aerosol components in real time with time resolution of a few minutes without interferences of gaseous pollutants.
Application of diffusion denuder for elimination of sampling artefacts of carbonaceous aerosols
Mikuška, Pavel ; Večeřa, Zbyněk ; Broškovičová, Anna ; Maenhaut, W. ; Chi, X.
An annular diffusion denuder was developed, enabling elimination of positive sampling artefacts and inteference of oxidants during sampling of organic aerosols on a quartz filter, placed in series behind the denuder at sampling flow-rate 16,6 l/min.
New sampler for continuous determination of soluble fraction of atmospheric aerosols
Mikuška, Pavel ; Večeřa, Zbyněk
A new sampler, enabling continuous sampling of atmospheric aerosols by deionized water, was developed. Using fast and sensitive detection methods, the analysis of water soluble aerosol components is possible on-line, in real time with low time resolution. By the combination of the sampler and the anular diffusion denuder, the interferences of gas pollutants are elimined. The aerosols withparticle diameter > 0.3 .mi.m are quantitatively collected at flow rates of air 5 l/min, and water 0.5 l/min, respectively. The applicability of the sampler was successfully verified.
Analýza produktů degradace škrobu a jiných karbohydrátů ze smrkového jehličí použitím různých analytických technik
Cabálková, J. ; Chmelík, Josef
Starch degradation products were analysed by AsFlFFF-MALS-RI and SEC-MALS-RI for determination of molar mass distribution. Separation of low molecular weight fractions of carbohydrates using HPLC-RI led to the identification of various mono-, di-, tri and tetrasaccharides. MALDI-TOF MS spectra showed the presence of higher oligosaccharides
Continuous determination of trace concentrations of ammonia in air
Hrdlička, Jan ; Večeřa, Zbyněk ; Mikuška, Pavel ; Opekar, F.
The determination of ammonia by means of the contactless conductivity detector is presented. For preconcentration of atmospheric amonia, a cylindrical wet effluent diffusion denuder was used.
Chemiluminescence determination of formaldehyde in air
Motyka, Kamil ; Mikuška, Pavel ; Večeřa, Zbyněk ; Hrdlička, Jan
A new method for continuous determination of formaldehyde in air based on preconcentration of formaldehyde in the cylindrical wet effluent diffusion denuder and subsequent chemiluminescence detection of formaldehyde in the denuder concentrate is presented.

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