Naslov
Analysis of triazine and phenylurea herbicides in soil by microwave-assisted extraction and liquid chromatography

Autori
Mendaš, Gordana ; Habinovec, Iva ; Drevenkar, Vlasta ; Dvoršćak, Marija ; Fingler, Sanja ; Stipičević, Sanja ; Vasilić, Želimira

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

Izvornik
24. hrvatski skup kemičara i kemijskih inženjera, Knjiga sažetaka, Book of Abstracts / Ukić, Šime ; Bolanča, Tomislav - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2015, 135-135

ISBN
978-953-6894-54-3

Skup
24. hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Zagreb, Hrvatska, 22.04.2015. - 24.04.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
liquid chromatography; microwave-assisted extraction; phenylurea herbicides; soil; triazine herbicides

Sažetak
A microwave-assisted extraction procedure was designed for the extraction of phenylurea herbicides isoproturon, chlortoluron, diuron and linuron, triazine herbicide terbuthylazine, and its degradation product deethylterbuthylazine from soil. The sample preparation was optimized for final analysis by high-performance liquid chromatography with a UV diode array detector. The limit of detection for all the analytes in standard mixture prepared in deionized water was 5 ng/ml, whereas the limit of quantification was 18 ng/ml. The effects of the extraction solvent, temperature, and water content in soil on microwave extraction efficiency of triazines and phenylurea herbicides from soil were investigated by analysing spiked soil samples. The analytes were added to a forest soil in mass fractions ranging from 93 to 113 ng/g. The best results were achieved by extraction of soil with solvent mixture ψ(acetone, n-hexane)= 1:1 at 60 °C and at soil water content of 20 %. The extraction efficiency from Cmrok wet soil was 84 % for isoproturon, 80 % for chlortoluron, 60 % for diuron, 85 % for linuron, 93 % for terbuthylazine, and 95 % for dethylterbuthylazine. Extraction efficiency and reproducibility of triazine and phenylurea herbicides with ψ(acetone, n-hexane) = 1:1 at 60 °C was also tested by extracting analytes from two agricultural dry and wet soils to which they were added at different mass fraction levels ranging from 37 to 45 ng/g, from 93 to 113 ng/g, and from 374 to 450 ng/g. The extraction efficiency of analytes was not dependent on their mass fractions in soil. The recoveries ranged from 72 % for isoproturon and diuron to 79 % for deethylterbuthylazine with relative standard deviation between 7 and 10 %. The limit of detection for all of the analytes in soil was 10 ng/g.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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