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为评价农药助剂壬基酚聚氧乙烯醚(NPnEO)在香蕉上使用的安全性,于2009-2010年在海南采用田间试验和超高效液相色谱-荧光分析方法研究了NPnEO及其降解产物壬基酚(NP)在香蕉及土壤中的消解动态和最终残留。结果表明:NPnEO在香蕉及土壤中的消解规律符合一级动力学模型,其半衰期分别为8.8～12 d和6.9～8.5 d,而其降解产物NP在香蕉和土壤中的半衰期分别为16～18 d和24～26 d。在香蕉收获期,NPnEO及NP在香蕉中的残留量均低于0.01 mg/kg。通过计算得出每人每天从香蕉中所摄入的NP仅为0.09μg,风险商值(RQ)为0.003,处于安全水平。
In order to evaluate the safety of nonylphenol polyoxyethylene ether (NPnEO) used on bananas, a field experiment and ultra performance liquid chromatography-fluorescence analysis of NPnEO and its degradation products were conducted in Hainan during 2009-2010. Digestion dynamics and final residues of nonylphenol (NP) in banana and soil. The results showed that the digestion law of NPnEO in banana and soil accorded with the first-order kinetic model, and the half-lives of NPnEO were 8.8-12 d and 6.9-8.5 d respectively. The half-lives of NPs in banana and soil were 16-18 d and 24 ~ 26 d. In the banana harvest, NPnEO and NP residues in bananas were less than 0.01 mg / kg. By calculation, the daily intake of NP from banana per person was only 0.09 μg, and the risk quotient (RQ) was 0.003, which was at a safe level.