Naslov
Examination of the MCPA and MCPP Mobility in Soils by Thin Layer Chromatography

Autori
Petrović, Mira ; Barbarić, Željka ; Kaštelan-Macan, Marija ; Ivanković, Danijela ; Horvat, Alka J.M.

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

Izvornik
6th International Symposium "New Achievements in Chromatography" / Smolec, Sonja ; Rogošić, Marko - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2000, 75-75

Skup
New Achievements in Chromatography

Mjesto i datum
NP Plitvička jezera, Hrvatska, 11.10.2000. - 13.10.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
MCPA; MCPP; mobility; soil; thin layer chromatography

Sažetak
The widespread use of pesticides for agricultural purposes and their increasingly frequent occurrence in underground waters have fostered research of their leaching from soils and development of improved methods for studying their mobility. MCPA and MCPP are hormone-type herbicides widely used as a mixture for the control of annual and perennial weeds in cereals. MCPA, MCPP, and their salt forms are soluble in water and very mobile in a variety of soils, so they may potentially leach into groundwater. Their mobility in soil largely depends on soil texture, organic matter content and soil pH. The aim of this work was to examine how the herbicides mobility is altered by the presence of fertilizers when both coexist in soil as a result of human activity. To correlate the pesticides mobility with their adsorption properties one of the most frequent methodes, soil thin-layer chromatography (STLC) is used, since it straghtforward, rapid and inexpensive. Sandy loam and clay loam soils used in this study were collected from the A horizon and their physico-chemical properties (sand, clay, silt and organic matter content, pH(H2O), pH(KCl), cation exchange capacity) were determined by standard methods. Soil TLC plates were prepared by drying, grinding and sieving the soil, preparing the slurry and spreding it as a 0.5 mm thick layer. The influence of NPK and KAN fertilizers, as well as, the fertilizers components KCl, (NH4)2HPO4, NH4NO3, NH4OH, on the mobility of MCPA and MCPP in sandy loam and clay loam soils was studied. Frontal RF-values were measured as the ratio of distance moved by the herbicide to that by developer. It can be concluded that the percentage of sand, silt and clay, as well as chemical structure properties of the herbicides influence the rate of propagation of the herbicide solution through the soil. Increased fertilizer content result in increasing mobility in both types of examined soils.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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