Predicting the Leachability of Pesticides from Soils Using Near-Infrared Reflectance

详细信息    查看全文

• 作者：Staffan Bengtsson ; Tomas Berglö ; f ; and Tore Sjö ; qvist
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：1996
• 出版时间：August 1996
• 年：1996
• 卷：44
• 期：8
• 页码：2260 - 2265
• 全文大小：278K
• 年卷期：v.44,no.8(August 1996)
• ISSN：1520-5118

文摘

The purpose of this study was to investigate if near-infraredreflectance (near-IR) spectroscopy andchemometric methods can be used as a rapid and simple procedure topredict the leachability ofpesticides from soil samples. The intention was to replace theoften tedious determination of anumber of chemical and physical parameters used to characterize soils.For selection of calibrationsamples, near-IR spectra were obtained for 76 different agriculturalsoil samples. Principalcomponent analysis of the spectra was used to select a subset of 20samples which were fortifiedwith six pesticides. Extraction was performed with supercriticalfluid extraction (SFE) or solidphase microextraction (SPME). Partial least-squares regression ofthe near-IR data could predict76% and 77% of the matrix-analyte interactions found by the SFE andSPME methods, respectively.The results clearly indicate that near-IR can be used tocharacterize soils for the prediction of theleachability of pesticides.Keywords: Predicting leachability; soil; pesticides; supercritical fluids;solid phase microextraction;near-infrared reflectance spectroscopy; multivariateanalysis