Procedure for the Measurement of Soil Inputs of Plant-Protection Agents Washed off through Vineyard Canopy by Rainfall

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• 作者：Raquel Rial Otero ; Beatriz Cancho Grande ; Manuel Arias Est&eacute ; vez ; Eugenio Ló ; pez Periago ; and Jesú ; s Simal Gá ; ndara
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2003
• 出版时间：August 13, 2003
• 年：2003
• 卷：51
• 期：17
• 页码：5041 - 5046
• 全文大小：101K
• 年卷期：v.51,no.17(August 13, 2003)
• ISSN：1520-5118

文摘

Soil inputs produced by rainfall waters washed off through a Ribeiro vineyard (Galicia, northwesternSpain) confirmed that levels recovered are <5% of the added fungicides. Laboratory studies showedthat some fungicides were degraded in the ODS cartridge used for the collection of fungicides washedoff by rainfall. Procymidone wash-off data obtained in the vineyard can be explained by a first-orderrate mass transfer model. A procedure for the collection of wash-off waters based on octadecylsilanesolid phase extraction, followed by an analytical method of reverse-phase liquid chromatographywith diode array detection is presented for the evaluation of fungicide inputs into soils after beingwashed off vineyards by rainfalls. Quality parameters of the analytical method yielded good precision(RSD < 10%) and low detection limits (ranging between 1 and 21 g/L).Keywords: Plant-protection agents; vineyards; rainfall; soil inputs; reverse-phase liquid chromatography with diode array detection