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PERSISTENCE OF TERBUFOS AND ITS METABOLITES IN SOIL AND MAIZE

机译:土壤和玉米中Terbufos及其代谢产物的持久性

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Degradation of ~(14)C terbufos was studied under greenhouse conditions. A mixture of ~(14)C labelled compound (2.48 × 10~4 Bq of O-ethyl-1-~(14)C) und unlabelled compound (0.09 g of the granule formulation Counter 10 G) was applied to pots containing 750 g of sandy loam clay Ultisol soil with 4.9% organic matter and a cation exchange capacity of 7.6. Two treatments were established, one where maize (cultivar Cristiani) was grown and the other without plants. The soil and plants were extracted at 0, 4, 8, 16, 32 and 64 days and analysed by a liquid scintillation counter, gas chromatography-flame photometric detector (GC-FPD) and autoradiography. The total ~(14)C compounds extracted on day 64 were 31 ± 5.6% of the radioactivity applied in the treatments with plants and 46.1 ± 1.1% without plants. From the autoradiography results it can be concluded that at all times the compounds identified by this technique were terbufos, terbufos sulphoxide and terbufos sulphone. These results will be compared with those to be obtained by GC-FPD and another extraction method. Plant extracts are currently being analysed.
机译:在温室条件下研究了〜(14)C Terbufos的降解。将〜(14)℃的混合物(2.48×10〜4bq的O-乙基-1-〜(14)c)施加未标记的化合物(0.09g颗粒配方计数器10g)施用于含有750的盆G含沙土粘土Ultisol土壤,有机物质4.9%和阳离子交换能力为7.6。建立了两种治疗方法,种植玉米(品种康西氏虫)的玉米和其他没有植物的治疗。在0,4,8,16,32和64天中萃取土壤和植物,并通过液体闪烁计数器,气相色谱 - 火焰光度检测器(GC-FPD)和放射自显影分析。在第64天提取的总〜(14)C化合物的放射性在植物治疗中的31±5.6%,46.1±1.1%没有植物。从放射向量结果中可以得出结论,在所有时间通过​​该技术鉴定的化合物是Terbufos,Terbufos硫代硫氧化物和Terbufos砜。将与通过GC-FPD和另一种提取方法获得的结果进行比较这些结果。目前正在分析植物提取物。

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