Naslov
Monitoring of triazine herbicides in waters, river sediments and soils

Autori
Drevenkar, Vlasta ; Štengl, Božena ; Fröbe, Zlatko ; Vasilić, Želimira

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

Izvornik
Euroanalysis IX - European Conference on Analytical Chemistry, Book of Abstracts / Palmisano, F ; Sabbatini, L ; Zambonin, P.G. - : FECS, Working Party on Analytical Chemistry, 1996, FrP87- FrP87

Skup
Euroanalysis IX - European Conference on Analytical Chemistry

Mjesto i datum
Bologna, Italija, 01.09.1996. - 07.09.1996

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
atrazine; simazine; prometryn; ametryn; analysis; water; soil; sediment

Sažetak
Due to their relatively high water solubility triazine herbicides are classified as agents involving a potentially high risk of leaching into the surface and ground waters. A systematic investigation of those herbicides in different waters in Croatia was initiated in 1992. Atrazine, prometryn, simazine and ametryn were analysed in river, streamlet, ground and drain waters, drinking waters from municipal water supplies, river sediments and surface soils. Samples were collected in rural agricultural areas and in the city of Zagreb. Triazine herbicides were accumulated from 500-mL water samples by C18 reversed phase adsorption and from 5-g from soil/sediment samples was performed by multiple extraction of 5-g with acetone:n-hexane 2:1 mixture. Qualitative and quantitative analyses were performed by capillary gas chromatography using the nitrogen/phosphorus and ion trap detectors. The accumulation efficiencies of herbicides from water at concentrations ranging from 0.2 to 2.0 ľg/L, were (%ąS.D.) 83ą15 for atrazine, 83ą13 for prometryn, 51ą13 for simazine and 79ą16 for ametryn. The respective recoveries from soil/sediment samples, spiked with 10-350 ľg/kg of individual herbicides, were (%ąS.D.) 56ą10, 61ą8, 60ą6 and 70ą8 . The detection limits of herbicides in water ranged from 10 to 50 ng/L and those in soil/sediment samples from 2 to 4 ľg/kg. In the 1992-1995 period triazine herbicides were analysed in altogether 87 river, 16 streamlet, 111 ground, 12 drain and 96 drinking water samples. Due to its intensive use in corn protection atrazine was detected the most frequently and in the highest concentrations in all types of water analysed. Traces of simazine, prometryn and ametryn were detected only occasionally. The highest atrazine concentrations in river (up to 3.02 ľg/L), streamlet (up to 8.28 ľg/L) and ground waters (up to 38.57 ľg/L) were measured in the spring months (May/June) shortly after its application in the fields. Traces of triazine herbicides were also detected in river sediments. Out of 24 analysed surface soil samples collected in an agricultural area where herbicides are regularly applied, 15 contained atrazine in concentrations ranging from 4 to 199 ľg/kg. Atrazine levels in drinking waters from municipal water supplies both in rural and urban areas often exceeded 0.1 ľg/L and no seasonal variations were observed. Atrazine was detected in all of 46 tap water samples collected in the Zagreb city area in concentrations ranging from 0.010 to 0.180 ľg/L (median 0.086 ľg/L). Those results confirm that more attention should be paid to the origins and levels of triazine herbicides in surface and ground waters that are intended for human consumption and used as drinking water supplies.

Izvorni jezik
Engleski

Znanstvena područja
Javno zdravstvo i zdravstvena zaštita

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