Naslov
Electroanalytical Methods In Aerosols Particulate Matter Characterization

Autori
Cvitešić Kušan, Ana ; Frka, Sanja ; Tasić, Viša ; Ciglenečki, Irena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Izvornik
WeBIOPATR2017 Particulate Matter: Research and Management : Abstracts of the 6th WeBIOPATR Workshop & Conference / Jovašević‐Stojanović Milena ; Bartonova Alena - Beograd : Public Health Institute of Belgrade, 2017, 18-18

Skup
The 6th International WeBIOPATR Workshop & Conference:Particulate Matter: Research And Management

Mjesto i datum
Beograd, Srbija, 06.09.2017. - 08.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
electrochemical methods ; dissolved organic carbon ; indoor and outdoor school air environments ; marine aerosols

Sažetak
In this work simple, direct, and nondestructive electrochemical methods, that are developed in our group, were applied for rough and rapid characterization of dissolved organic matter (DOM) with surface active properties (SAS) (Frka et al., 2012) in water soluble particulate matter fractions of marine aerosols (PM2.5), and indoor and outdoor school air environments (PM2.5, PM10). In parallel in some samples presence of sulphur species (RSS) that accumulate at the Hg electrode (Krznarić et al. 2001) were determined as well. Carbonaceous aerosol (organic carbon- OC, and elemental carbon-EC) makes up a large fraction of air particular matter. Therefore, electrochemistry measurements were combined with measurements of total and dissolved organic carbon (TOC, DOC) by high temperature catalytic oxidation (HTCO). Mass concentrations of indoor and outdoor PM fractions were measured with low volume sampler Sven/Leckel LVS3 with size-selective inlets for PM10 and PM2.5fractions (2.3 m3/h, sampling time: 24 h) in the school Vožd Karađorđe in the city of Niš, Serbia (Kovačević et al. 2015). Quartz fiber filters (Whatman QMA, 47 mm diameter) were used for this ambient air sampling. The marine aerosol samples (PM2.5) were collected seasonally on GF/F filters (47 mm diameter) by low volume sampler Sven/Leckel SEQ 47/50 (2.3 m3/h, sampling time: 24 h) in the central Dalmatia (Middle Adriatic). Concentrations of the marine aerosol mass fluctuated from around 2.5 to 50 μg/m3, while average daily school outdoor PM2.5 concentration was 22 μg/m3, and indoor 32 μg/m3. The water-soluble particulate fractions from both aerosol location was extracted by placing half of the filters in 0.13–0.2 dm3 of high purity deionised MilliQ water (Millipore Corp.) for 24 h. The extracts were then filtered through 0.7 μm GF/F filters pre- combusted at 450 °C for 5 h and directly used for electrochemical measurements and water soluble organic carbon analysis. Study on the SAS and DOC in water soluble fraction of PM provides an important insight in the content and type of the complex mixture of organic matter with mainly hydrophobic and hydrophilic characteristics. Characterization of sulfur fraction, based on measurements of inorganic and organic RSS, comprise a group of compounds that contain sulfur in nominally -II and 0 oxidation states (sulfide, organic thiols, inorganic and organic di- and polysulfides, polysulfanes, dissolved molecular S0) (Orlović et al. 2016, 2017). Preliminary results, as expected showed diference among marine and urban air PMs organic matter content, that will be compared and discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA