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利用14C-正十六烷示踪技术、水稻盆栽和溶剂连续化学提取方法,研究了正十六烷在土壤水稻系统中的某些行为。结果表明,正十六烷容易进入水稻并累积于籽实,对人类健康产生不良影响。实验还探讨了土壤和水稻体内14C-正十六烷的存在和代谢转化过程。土壤中的正十六烷14C主要以溶剂可提取形式存在,大约占总14C的39%,其次是存在于土壤未分解的植物残体(大约占25%)和富啡酸组分(大约占23%)。以无机碳酸盐存在的大约占10%,进入胡敏酸(包括胡敏素)结构的数量较少,总计约占3%。正十六烷在水稻体内主要以结合残留态存在,大约占植物体总14C的98%,石油醚、乙醇和乙醇等有机溶剂可提取部分大约占2%。正十六烷进入水稻系统后,经历时间愈短,结合残留态愈少,溶剂可提态愈多。在石油醚提取液中,Rf值大于正十六烷的极性代谢物占21%。
Some behaviors of n-hexadecane in soil-paddy rice system were studied by 14C-n-hexadecane tracing technique, continuous potted rice and solvent chemical extraction. The results showed that n-hexadecane easily entered rice and accumulated in the seeds, which had an adverse effect on human health. The experiment also discussed the soil and rice body 14 C-n-hexadecane the existence and metabolic transformation process. The n-hexadecane 14C in the soil mainly exists as a solvent extractable form, accounting for about 39% of the total 14C, followed by plant undecomposed plant residues (about 25%) and fulvic acid components ( About 23%). About 10% of the inorganic carbonate present, the amount of humic acid (including humin) into the structure of the less, accounting for a total of about 3%. N-Hexadecane mainly exists in the bound residues in rice, accounting for about 98% of the total 14C of the plant body. About 2% of the extractable parts of the organic solvent such as petroleum ether, ethanol and ethanol are partial. After the n-hexadecane enters the rice system, the shorter the duration of the reaction, the smaller the residual amount of the combination is, and the more the solvent can be made. In petroleum ether extracts, polar metabolites with Rf values greater than n-hexadecane accounted for 21%.