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National Chung Hsing University Institutional Repository - NCHUIR > 農業暨自然資源學院 > 農業暨自然資源學院 > 依資料類型分類 > 期刊論文 >  Residue analysis of fungicide boscalid in cucumbers following applications of boscalid 50% water dispersible granule

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標題: Residue analysis of fungicide boscalid in cucumbers following applications of boscalid 50% water dispersible granule
作者: Chen, M.F.;Huang, J.W.;Chien, H.P.
關鍵字: boscalid;residue;analysis;cucumber;dissipation;tandem mass-spectrometry;chromatography
日期: 2007
Issue Date: 2012-12-14 10:57:48 (UTC+8)
關連: Journal of Food and Drug Analysis, Volume 15, Issue 2, Page(s) 174-177.
摘要: This study determined the residue of fungicide boscalid in/on cucumbers following three applications of boscalid 50% water dispersible granule (WG). The fungicide was applied to cucumbers at two rates, 0.5 and 0.83 kg a.i./ha. Samples were collected at 0, 1, 2, 3, 4, 6, 7, 10, 12, 15, 19, and 21 d after the last application. The sample was extracted with methanol/H2O/(2) N HCl (70:25:5, v/v) and n-hexane and subject to GC analysis. Residues of boscalid were determined by GC/mu-ECD with DB-5 capillary column. Recoveries of boscalid in/on cucumbers ranged from 86.0 to 103.6% and the relative standard deviation (RSD) ranged from 1.2 to 4.8%. The limit of quantification was 0.01 mu g/mL (S/N>10). This analytical method was applied to study the dissipation of boscalid in/on cucumbers. The results indicated that the residues of boscalid were declined in/on cucumbers with time. Only 5 and 17% of the initial deposits were found in/on the cucumbers 6 d after the last application at the low and high dose, respectively.
Relation: Journal of Food and Drug Analysis
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 黃振文

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