Lee W O, Wong S K
Government Laboratory, Homantin, Kowloon, Hong Kong.
Analyst. 1995 Oct;120(10):2475-8. doi: 10.1039/an9952002475.
A simple and rapid method for the determination of bitertanol, metalaxyl, oxadixyl, propiconazole and triadimefon residues in cucumbers has been developed. The fungicide residues were extracted from the sample with ethyl acetate and determined, after an automated gel permeation chromatographic clean-up, by GC with nitrogen-phosphorus detection. Cucumbers fortified with fungicides in the laboratory were analysed using the proposed method and that of Luke, Frooberg, Masumoto and Doose (J. Assoc. Off. Anal. Chem., 1981, 64, 1187). For the proposed method, mean recoveries ranged from 87.9% for bitertanol to 96.5% for oxadixyl. For the method of Luke et al. mean recoveries ranged from 79.8% for triadimefon to 97.8% for bitertanol. Cucumbers treated with the fungicides in the field were also analysed by these two methods. For the determination of all these five fungicides, no difference was observed at the 5% significance level.
已开发出一种简单快速的方法，用于测定黄瓜中双苯三唑醇、甲霜灵、恶霜灵、丙环唑和三唑酮的残留量。用乙酸乙酯从样品中提取杀菌剂残留，经自动凝胶渗透色谱净化后，采用带氮磷检测器的气相色谱法进行测定。使用所提出的方法以及Luke、Frooberg、Masumoto和Doose的方法（《官方分析化学家协会杂志》，1981年，64卷，1187页）对实验室中添加了杀菌剂的黄瓜进行分析。对于所提出的方法，双苯三唑醇的平均回收率为87.9%，恶霜灵为96.5%。对于Luke等人的方法，三唑酮的平均回收率为79.8%，双苯三唑醇为97.8%。还用这两种方法分析了田间用杀菌剂处理过的黄瓜。对于所有这五种杀菌剂的测定，在5%的显著性水平上未观察到差异。
