Residue Analysis of Fungicide Boscalid in Cucumbers Following Applications of Boscalid 50% Water Dispersible Granule

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, 18, and 21 d a...

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Published in藥物食品分析 Vol. 15; no. 2; pp. 174 - 177
Main Authors 陳妙帆(Miao-Fan Chen), 黃振文(Jenn-Wen Huang), 簡秀保(Hsiu-Pao Chien)
Format Journal Article
LanguageEnglish
Published 衛生福利部食品藥物管理署 01.06.2007
Subjects
分析
小黃瓜
消退
cucumber
boscalid
殘留
analysis
dissipation
residue
白克列
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ISSN1021-9498

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Summary: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, 18, 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/μ-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 μg/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.
ISSN:1021-9498