Halimah Muhamad, Ismail B Sahid, Nashriyah Mat, Maznah Zainol
Analytical and Quality Development Unit, Product Development and Advisory Services Division, Malaysian Palm Oil Board, No. 6, Persiaran Institusi, Bandar Baru Bangi, 43000, Kajang, Selangor, Malaysia.
School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia.
Bull Environ Contam Toxicol. 2016 Jan;96(1):120-4. doi: 10.1007/s00128-015-1685-3. Epub 2015 Nov 6.
The mobility of (14)C-chlorpyrifos using soil TLC was investigated in this study. It was found that chlorpyrifos was not mobile in clay, clay loam and peat soil. The mobility of (14)C-chlorpyrifos and non-labelled chlorpyrifos was also tested with silica gel TLC using three types of developing solvent hexane (100%), hexane:ethyl acetate (95:5, v/v); and hexane:ethyl acetate (98:2, v/v). The study showed that both the (14)C-labelled and non-labelled chlorpyrifos have the same Retardation Factor (Rf) for different developing solvent systems. From the soil column study on mobility of chlorpyrifos, it was observed that no chlorpyrifos residue was found below 5 cm depth in three types of soil at simulation rainfall of 20, 50 and 100 mm. Therefore, the soil column and TLC studies have shown similar findings in the mobility of chlorpyrifos.
本研究考察了（14）C-毒死蜱在土壤薄层层析中的迁移性。结果发现，毒死蜱在黏土、黏壤土和泥炭土中不具有迁移性。还使用硅胶薄层层析，采用三种展开溶剂己烷（100%）、己烷：乙酸乙酯（95:5，v/v）和己烷：乙酸乙酯（98:2，v/v），对（14）C-毒死蜱和未标记毒死蜱的迁移性进行了测试。研究表明，对于不同的展开溶剂系统，（14）C标记的毒死蜱和未标记的毒死蜱具有相同的阻滞因子（Rf）。通过对毒死蜱迁移性的土柱研究发现，在模拟降雨量为20、50和100毫米时，在三种类型的土壤中，5厘米深度以下均未发现毒死蜱残留。因此，土柱和薄层层析研究在毒死蜱迁移性方面显示出相似的结果。
