Multiresidue analysis of pesticides in vegetables and fruits using a high capacity absorbent polymer for water.
Multiresidue analysis of pesticides in vegetables and fruits using a high capacity absorbent polymer for water.
复制标题
使用高容量吸水性聚合物对蔬菜和水果中的农药进行多残留分析。
DOI：
10.1039/a903297e
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Hori
中科院分区：
文献类型：
--
作者：
H. Obana;K. Akutsu;M. Okihashi;S. Kakimoto;S. Hori
建立了一种非脂肪类蔬菜和水果中农药多残留分析的单一提取和单一清理方法。该方法涉及使用高容量吸收性聚合物作为干燥剂从湿食品样品中提取水，并使用石墨化碳柱进行清理。将切碎均匀的食物样品（20 g）和聚合物（3 g）混合，以吸收样品中的水分，然后10分钟后用乙酸乙酯（100 ml）大力提取混合物。提取液（50ml）经过滤分离后，装在石墨化碳柱上不加浓度。额外的乙酸乙酯（50 ml）也被洗脱，两种洗脱液浓缩到5 ml进行分析。样品制备在2 h内完成。在回收率试验中，添加107种农药，芦笋、橘子、土豆和草莓的平均回收率均在80%以上。6次试验中，大多数农药回收率在70 ~ 120%之间，RSD通常小于10%。结果表明，在聚合物存在下，乙酸乙酯单次萃取法可用于食品中农药残留的监测。
A single extraction and a single clean-up procedure was developed for multi-residue analysis of pesticides in non-fatty vegetables and fruits. The method involves the use of a high capacity absorbent polymer for water as a drying agent in extraction from wet food samples and of a graphitized carbon column for clean-up. A homogeneously chopped food sample (20 g) and polymer (3 g) were mixed to absorb water from the sample and then 10 min later the mixture was vigorously extracted with ethyl acetate (100 ml). The extract (50 ml), separated by filtration, was loaded on a graphitized carbon column without concentration. Additional ethyl acetate (50 ml) was also eluted and both eluates were concentrated to 5 ml for analysis. The procedure for sample preparation was completed within 2 h. In a recovery test, 107 pesticides were spiked and average recoveries were more than 80% from asparagus, orange, potato and strawberry. Most pesticides were recovered in the range 70-120% with usually less than a 10% RSD for six experiments. The results indicated that a single extraction with ethyl acetate in the presence of polymer can be applied to the monitoring of pesticide residues in foods.